Effect of Nitrifiers Community on Fouling Mitigation and Nitrification Efficiency in a Membrane Bioreactor
Publication date: Available online 5 April 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Arsalan Sepehri, Mohammad-Hossein Sarrafzadeh Membrane fouling in membrane bioreactors (MBR) normally depends on the microbial cell density and microbial population structure. A nitrifying-enriched activated sludge (NAS) was obtained in this study through particular ammonium feeding of conventional activated sludge (CAS). Next, the dominance of autotrophic nitrifier population in NAS system was checked and compared with CAS system by its high nitrification efficiency (100% vs. 43%) and low COD re...
Source: Chemical Engineering and Processing: Process Intensification - April 6, 2018 Category: Chemistry Source Type: research

Parametric investigation on biomass gasification in a fluidized bed gasifier and conceptual design of gasifier
In this study, rice husk gasification process, in a bubbling fluidized bed gasifier, was investigated. To simulate gasification process, a kinetic model was used which comprises chemical kinetic and flow hydrodynamics. This model is based on two phase fluidized theory, in which, it is assumed that there are two phases in the bed which there is mass and energy transfer between them. These two phases are bubble phase and emulsion phase (containing solid particles). In this model, it is assumed that temperature remains constant along the reactor. Results had a satisfactory agreement with the existed experimental studies in th...
Source: Chemical Engineering and Processing: Process Intensification - April 6, 2018 Category: Chemistry Source Type: research

Synthesis, characterization, and application of ruthenium-doped SrTiO3 perovskite catalysts for microwave-assisted methane dry reforming
Publication date: May 2018 Source:Chemical Engineering and Processing - Process Intensification, Volume 127 Author(s): Lalit S. Gangurde, Guido S.J. Sturm, M.J. Valero-Romero, Reyes Mallada, Jesus Santamaria, Andrzej I. Stankiewicz, Georgios D. Stefanidis A series of ruthenium-doped strontium titanate (SrTiO3) perovskite catalysts were synthesized by conventional and microwave-assisted hydrothermal methods. The structure was analyzed by X-Ray diffraction (XRD) confirming the formation of the perovskite phase with some TiO2 anatase phase in all the catalysts. Microwave irradiation decreases the temperature and time of synt...
Source: Chemical Engineering and Processing: Process Intensification - April 6, 2018 Category: Chemistry Source Type: research

Major trends and roadblocks in CFD-aided process intensification of biomass pyrolysis
Publication date: Available online 3 April 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Qingang Xiong, Fei Xu, Yaoyu Pan, Yang Yang, Zhiming Gao, Shuli Shu, Kun Hong, Francois Bertrand, Jamal Chaouki Process intensification is critical to increase product yields and reduce external power consumption in biomass pyrolysis. Computational fluid dynamics offers great possibilities for fast and economical process intensification of biomass pyrolysis. This succinct but in-depth current-perspective feature article discusses the major trends and roadblocks with respect to CFD-aided process i...
Source: Chemical Engineering and Processing: Process Intensification - April 4, 2018 Category: Chemistry Source Type: research

Co-gasification of Indonesian coal and microalgae – A thermodynamic study and performance evaluation
Publication date: Available online 3 April 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Muflih A. Adnan, Mohammad M. Hossain A new integrated co-gasification of coal and biomass simulation model was developed using Aspen Plus. It consisted of three main processes: (i) gasification, (ii) reforming and (iii) CO2 absorption. The simulation exhibited a good accuracy when compared to the experimental values under same operating conditions. In co-gasification evaluation, a low-rank Indonesian coal and N. oculata microalgae biomass were considered as feedstocks. The parametric study was ca...
Source: Chemical Engineering and Processing: Process Intensification - April 3, 2018 Category: Chemistry Source Type: research

Greening the green ethylene with microwaves
Publication date: Available online 3 April 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): L.A. Jermolovicius, E.V.S. Pouzada, R.B. do Nascimento, E.R. de Castro, J.T. Senise, B.B. Mente, M.C. Martins, S.M. Yamaguchi, V.C. Sanchez This paper presents a study to develop a microwave irradiated fixed bed flow reactor for high temperature operations. One innovation introduced is the concept of catalytic bed sensitive to microwave heating which catalyzes the reaction and heats only the reaction site. Another innovation is on the cavity design, which is of a non-standard shape, which is a re...
Source: Chemical Engineering and Processing: Process Intensification - April 3, 2018 Category: Chemistry Source Type: research

Role of curvature of walls (concave/convex) for intensification of thermal processing with optimal exergy loss during natural convection of fluids
Publication date: Available online 3 April 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Damodara Priyanka, Tanmay Basak Based on its potential to develop more sustainable and energy efficient systems, process intensification is on increasing importance in various processing industries. The process intensification vs efficiency is carried out for natural convection in square enclosure and curved (concave/convex) wall enclosures via heatlines and entropy generation analysis for the development of sustainable process equipment design. As the selection of an optimal cavity is the main o...
Source: Chemical Engineering and Processing: Process Intensification - April 3, 2018 Category: Chemistry Source Type: research

Multi-fluid modeling biomass fast pryolysis with particle shrinkage model for complex reaction kinetics
Publication date: Available online 31 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Hanbin Zhong, Juntao Zhang, Yuqin Zhu, Shengrong Liang In the gas-solid fluidized bed reactors for biomass fast pyrolysis, the diameter of particles normally shrink with the process of reaction, which not only affects the hydrodynamics such as segregation/mixing and entrainment behavior, but also influences the yield and composition of the products. Since the particle shrinkage model developed by our previous work (Powder Technology, 2016, 294: 43-54.) could be only applied for the simplified no...
Source: Chemical Engineering and Processing: Process Intensification - April 1, 2018 Category: Chemistry Source Type: research

Innovative 3D-manufacture of structured copper supports post-coated with catalytic material for CO2 methanation
Publication date: Available online 29 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Simge Danaci, Lidia Protasova, Frans Snijkers, Wim Bouwen, Alain Bengaouer, Philippe Marty Innovative copper 3D-structures were manufactured by additive manufacturing (AM) technique for application as catalytic supports in CO2 methanation. The influence of the sintering temperature, atmosphere and technique (pulsed electrical current sintering (PEC) vs conventional furnace sintering) was investigated. The microstructural evolution of the support was analysed by low-temperature N2 adsorption, sca...
Source: Chemical Engineering and Processing: Process Intensification - March 30, 2018 Category: Chemistry Source Type: research

Numerical investigation of mixing enhancement for multi-species flows in wavy channels
Publication date: Available online 29 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Preetirekha Borgohain, Dikhsita Choudhary, Amaresh Dalal, Ganesh Natarajan The present study considers the mixing characteristics of gaseous species in a channel with wavy walls. Waviness imparted along the walls are uniquely defined by the wavelength (λ), amplitude (a) and phase difference (PD). A quasi-incompressible formulation in a three-dimensional collocated finite volume framework is employed for the numerical simulations. Results show that wavy channels lead to enhanced mixing, qu...
Source: Chemical Engineering and Processing: Process Intensification - March 30, 2018 Category: Chemistry Source Type: research

Flotation Technique: Its Mechanisms and Design Parameters
Publication date: Available online 29 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Ritesh Prakash, Subrata Kumar Majumder, Anugrah Singh A knowledge of hydrodynamic characteristics is important because it helps in design, control, analysis, optimization, operation, and modelling of the system, which enhances the performance of process unit. This paper aims to provide the evaluation of the techniques of flotation and design parameters, which is required improving the separation efficiency of the flotation processes. Different components of flotation columns, flotation mechanism...
Source: Chemical Engineering and Processing: Process Intensification - March 30, 2018 Category: Chemistry Source Type: research

Preparation of 3D graphene/iron oxides aerogels based on high-gravity intensified reactive precipitation and their applications for photo-Fenton reaction
Publication date: Available online 28 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Zhijian Zhao, Zhiyong Wang, Dan Wang, Jie-Xin Wang, Neil. R. Foster, Yuan Pu, Jian-Feng Chen In this work, we reported the preparation of 3D graphene/iron oxides aerogels (IO/GA) by in situ growth of iron oxide nanoparticles (IO) on the graphene oxides in high gravity rotating packed bed (RPB) followed by freeze drying treatments. The RPB was used to intensify the mass transfer and mixing during the adsorption and nucleation process of IO, guaranteeing highly homogeneous reaction conditions to t...
Source: Chemical Engineering and Processing: Process Intensification - March 29, 2018 Category: Chemistry Source Type: research

Transient CHF enhancement in High Pressure Pool Boiling on Rough Surface
Publication date: Available online 26 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Avdhoot Walunj, A. Sathyabhama Experimental investigation of transient pool boiling heat transfer (PBHT) to saturated water from thick, non-lumped 20 mm diameter copper sample is carried at 1 bar, 5 bar and 10 bar pressure. The time constant (γ) of exponential heat supply is varied from 1 to 6. The unidirectional scratches are made on the surface to obtain wide range of surface roughness varying from Ra  = 0.106 μm to Ra  = 4.03 μm. The effect of surface roughness...
Source: Chemical Engineering and Processing: Process Intensification - March 27, 2018 Category: Chemistry Source Type: research

Study on performance enhancement factors in turbulent flow of CNT/water nanofluid through a tube fitted with helical screw louvered rod inserts
Publication date: Available online 27 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): P. Rathnakumar, S. Mohamed Iqbal, Jee Joe Michael, S. Suresh The aim of this study is to investigate the enhancement of thermal performance characteristics in a plain tube fitted with helical screw louvered rod inserts using water and carbon nanotube (CNT)/water nanofluids of 0.1%, 0.2% and 0.5% volume concentration under turbulent flow condition. In the experiments, the swirling flow was introduced by using helical screw louvered rod inserts arrangements (forward and backward) inside the inner ...
Source: Chemical Engineering and Processing: Process Intensification - March 27, 2018 Category: Chemistry Source Type: research

Numerical simulation for electro-osmotic mixing under three types of periodic potentials in a T-shaped micro-mixer
Publication date: Available online 23 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Youliang Cheng, Yan Jiang, Wenyang Wang Electro-osmotic process perpendicular to the mainstream direction is able to promote fluid mixing greatly under micro-scale condition. Three types of periodic potentials are applied on the electrodes fixed to the wall of a T-shaped micro-mixer. Mixing process and efficiency in different frequencies are obtained by numerical simulation. It is concluded that mixing efficiency fluctuates with the time when the frequency is relatively small and the fluctuation...
Source: Chemical Engineering and Processing: Process Intensification - March 24, 2018 Category: Chemistry Source Type: research

Dispersion of supercritical carbon dioxide to [Emim][BF4] with a T-junction tubing connector
Publication date: May 2018 Source:Chemical Engineering and Processing - Process Intensification, Volume 127 Author(s): Kang Qin, Kai Wang, Rui Luo, Yang Li, Tao Wang The two-phase mixtures organized by ionic liquids (ILs) and carbon dioxide (CO2) are green systems for creation and purification of fine chemicals and natural products. Owing to the very low vapor pressure of ILs, the mixture of supercritical CO2 (ScCO2) and IL has asymmetrical solubility, which is special for engineering application. However, due to the high viscosity of IL and the large density difference between IL and ScCO2, they are difficult to well mix...
Source: Chemical Engineering and Processing: Process Intensification - March 24, 2018 Category: Chemistry Source Type: research

Synthesis, characterization, and application of ruthenium-doped SrTiO3 perovskite catalyst for microwave-assisted methane dry reforming
Publication date: Available online 22 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Lalit S. Gangurde, Guido S.J. Sturm, M.J. Valero-Romero, Reyes Mallada, Jesus Santamaria, Andrzej I. Stankiewicz, Georgios D. Stefanidis A series of ruthenium-doped strontium titanate (SrTiO3) perovskite catalysts were synthesized by conventional and microwave-assisted hydrothermal methods. The structure was analyzed by X-Ray diffraction (XRD) confirming the formation of the perovskite phase with some TiO2 anatase phase in all the catalysts. Microwave irradiation decreases the temperature and ti...
Source: Chemical Engineering and Processing: Process Intensification - March 23, 2018 Category: Chemistry Source Type: research

Sorption-enhanced methanol steam reforming for hydrogen production by combined copper-based catalysts with hydrotalcites
Publication date: Available online 21 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Tongyichao Qi, Ying Yang, Yijiang Wu, Jin Wang, Ping Li, Jianguo Yu Hydrogen is stored in liquid methanol to ensure safe transportation, and when needed, hydrogen is produced in situ through methanol steam reforming at a relatively low temperature (about 473 K-573 K), which is considered as a significant breakthrough in the storage and transport system of hydrogen energy. To improve methanol conversion, the process intensification technology, called as sorption enhanced methanol steam reform...
Source: Chemical Engineering and Processing: Process Intensification - March 22, 2018 Category: Chemistry Source Type: research

Periodic open cellular structures (POCS) for intensification of multiphase reactors: Liquid holdup and two-phase pressure drop
Publication date: April 2018 Source:Chemical Engineering and Processing - Process Intensification, Volume 126 Author(s): Markus Lämmermann, Giulia Horak, Wilhelm Schwieger, Hannsjörg Freund Structuring concepts for catalytic reactors provide promising options for process intensification on the process unit level [1,2] as they offer a better control on the occurring transport processes, e.g. on the fluid flow, species distribution, pressure drop and heat transfer. Process intensification aims at the realization of processes that are only limited by reaction kinetics, but not anymore on hydrodynamics [3]. For this...
Source: Chemical Engineering and Processing: Process Intensification - March 22, 2018 Category: Chemistry Source Type: research

A review on the application, simulation, and experiment of the electrokinetic mixers
Publication date: April 2018 Source:Chemical Engineering and Processing - Process Intensification, Volume 126 Author(s): Saman Rashidi, Haniyeh Bafekr, Mohammad Sadegh Valipour, Javad Abolfazli Esfahani Electrokinetic driven flow can be used as an active technique to improve mixing in various devices. This technique is employed to mix fluid samples rapidly and efficiently in different geometries. There are numerous numerical and experimental studies on this subject in the literature. This paper is review of the studies performed on electrokinetic mixing techniques including electroosmosis, electrophoresis, and dielectroph...
Source: Chemical Engineering and Processing: Process Intensification - March 22, 2018 Category: Chemistry Source Type: research

Optimal Retrofit and Debottlenecking using Novel Multi-Effect Dividing Wall Column
Publication date: Available online 20 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Nguyen Van Duc Long, Tram Ngoc Pham, Moonyong Lee This paper proposes several novel multi-effect dividing wall column (MEDWC) configurations to retrofit and debottleneck side-stream columns or two-column sequences for multiple objectives such as increasing the column throughput, maximizing energy efficiency, and reducing carbon dioxide (CO2) emissions. This paper also proposes a new practical method that employs a coordinate descent methodology, which is assisted by a random search to avoid loca...
Source: Chemical Engineering and Processing: Process Intensification - March 21, 2018 Category: Chemistry Source Type: research

Process Intensification for Pharmaceutical Crystallization
Publication date: Available online 19 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Jiayuan Wang, Fei Li, Richard Lakerveld Process intensification (PI) provides great opportunities to drastically improve the performance of chemical processes within many branches of chemical industry including the pharmaceutical industry. Crystallization is an important purification and separation technology within many pharmaceutical processes. This paper provides a systematic review on the recent developments of PI approaches that are applicable to pharmaceutical crystallization. The various ...
Source: Chemical Engineering and Processing: Process Intensification - March 20, 2018 Category: Chemistry Source Type: research

Integrated extraction-adsorption process for selective recovery of antioxidant phenolics from food industry by-product
Publication date: Available online 19 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): D. Pradal, P. Vauchel, S. Decossin, P. Dhulster, K. Dimitrov This work aimed at proposing a green process for selective recovery of antioxidant polyphenols, in order to propose a sustainable valorisation of chicory grounds, a food-industry by-product. An integrated extraction-adsorption process was performed, enabling simultaneous extraction of phenolics and their purification in a single operation. After selecting the most efficient adsorbent among tested and experimental conditions for adsorpt...
Source: Chemical Engineering and Processing: Process Intensification - March 20, 2018 Category: Chemistry Source Type: research

CFD and Experimental studies the effect of micro-channel turbulence promoter installation on the hydrodynamic performance of submerged flat-sheet membrane bioreactor
Publication date: Available online 17 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Fang Xie, Hui Ge, Jinrong Liu, Weiwei Hongwei Song The aim of the present work is to investigate the effect of a micro-channel turbulence promoter(MCTP) installation on the hydrodynamic performance of a submerged membrane bioreactors(SMBRs). The hydrodynamic and filtration performance of the micro-channel turbulence promoter installation in the submerged flat-sheet membrane bioreactor carried out by computational fluid dynamics (CFD) simulations and filtration performance experimental. The CFD s...
Source: Chemical Engineering and Processing: Process Intensification - March 19, 2018 Category: Chemistry Source Type: research

Effect of oxygen enrichment on combustion efficiency of lean H2/N2/O2 flames in a micro cavity-combustor
Publication date: Available online 19 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Wei Yang, Linhong Li, Aiwu Fan, Hong Yao Micro combustor is the core component of combustion-based micro power generation systems. Our recent studies showed that the combustion efficiency of lean H2/air flames in a micro-cavity combustor deceased rapidly at high inlet velocities due to the emergence of flame tip opening. To improve this undesirable phenomenon, oxygen enrichment was employed in this study. Numerical investigations of lean H2/O2/N2 flames with an equivalence ratio of 0.4 were cond...
Source: Chemical Engineering and Processing: Process Intensification - March 19, 2018 Category: Chemistry Source Type: research

Continuous-flow synthesis of azo dyes in a microreactor system
Publication date: Available online 16 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Fajun Wang, Jinpei Huang, Jianhong Xu Azo dye is a kind of synthetic dye containing azo group (Ar-N=N-Ar). In this paper, an efficient process intensification for the continuous synthesis of azo dye is developed by using a microreactor system. Firstly, the reaction conditions of azo-coupling reaction were optimized and a microreactor was utilized as the mixing and reacting unit. 1- (4- sulfonicphenyl) -3- methyl -5- pyrazolone was the coupling component and aniline was the diazo component. The r...
Source: Chemical Engineering and Processing: Process Intensification - March 17, 2018 Category: Chemistry Source Type: research

Efficient enrichment and recovery of rare earth elements with low concentration by membrane dispersion micro-extractors
Publication date: Available online 16 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Zhuo Chen, Fu-Ning Sang, Jian-Hong Xu, Guang-Sheng Luo, Yun-Dong Wang Membrane dispersion micro-extractors were used both in gas-liquid-liquid system to realize the intensification of REEs extraction at high phase ratio and also in stripping process to recover the rare earth elements (REEs) with low concentration (<100 mg/L) from industrial waste water. The effects of three phase (organic, aqueous, gas) flow rates on the extraction efficiency were investigated. The results indicated tha...
Source: Chemical Engineering and Processing: Process Intensification - March 17, 2018 Category: Chemistry Source Type: research

UU-type parallel mini-hydrocyclone group separation of fine particles from methanol-to-olefin industrial wastewater
Publication date: Available online 16 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Wen-jie Lv, Jian-qi Chen, Yu-long Chang, Hong-lai Liu, Hua-lin Wang Mini-hydrocyclones are used to separate fine particles from wastewater and are typically used in a parallel configuration to enhance wastewater treatment. Based on a mini-hydrocyclone group with a UU-type parallel configuration, a 300-times scaled-up parallel unit of mini-hydrocyclones was created and then used in single-phase experiments to study the distribution of flow and pressure drop, as well as in liquid-solid two-phase e...
Source: Chemical Engineering and Processing: Process Intensification - March 17, 2018 Category: Chemistry Source Type: research

Mass transfer between phases in microchannels: A review
Publication date: Available online 15 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Mehdi Sattari-Najafabadi, Mohsen Nasr Esfahany, Zan Wu, Bengt Sunden The multiphase micro-structured devices such as microchannels have been recently taken into consideration to replace the conventional equipment in different applications. The mass transfer coefficients and the interfacial area in the multiphase microchannels are much larger than those in the conventional equipment. This paper reviews the experimental studies on mass transfer in gas-liquid and liquid-liquid microchannels. Propos...
Source: Chemical Engineering and Processing: Process Intensification - March 16, 2018 Category: Chemistry Source Type: research

Studies of mass transfer at a spiral-wound woven wire mesh rotating cylinder electrode
Publication date: Available online 14 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Ali H. Abbar, Rasha H. Salman, Ammar S. Abbas Mass transfer has been studied at rotating cylinder electrodes fabricated with spiral-wound woven-wire meshes using reduction of copper as a test reaction. The experimental data were correlated by an empirical expression between the Sherwood number and the Reynolds number, both regarding the hydraulic diameter as a characteristic length. It was found that the Sherwood number was dependent upon the Reynolds number to the power of 0.521. An enhancement...
Source: Chemical Engineering and Processing: Process Intensification - March 15, 2018 Category: Chemistry Source Type: research

Heat transfer intensification using CuO-water nanofluid in a finned capsule-shaped heat exchanger using lattice Boltzmann method
Publication date: Available online 13 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Alireza Rahimi, Abbas Kasaeipoor, Emad Hasani Malekshah, Abtin Shadab Far, Mohammad Sepehr The natural convection fluid flow and heat exchanger in a capsule-shape heat exchanger is investigated. The lattice Boltzmann method is used to simulate the fluid flow and heat transfer in the enclosure. To predict the thermal conductivity and dynamic viscosity of CuO-water nanofluid, the KKL-model is utilized which is able to apply the Brownian motion of the nanoparticles. In order to carry out a comprehe...
Source: Chemical Engineering and Processing: Process Intensification - March 14, 2018 Category: Chemistry Source Type: research

Graphene Quantum Dots Modified Polyvinylidenefluride (PVDF) Nanofibrous Membranes with Enhanced Performance for Air Gap Membrane Distillation
This study investigates the potential of novel graphene quantum dots (GQDs)/polyvinylidene fluoride (PVDF) nanofibrous membranes for water desalination via air gap membrane distillation (AGMD) process. Different contents of GQDs were loaded in/on nanofibrous membrane for obtaining the desired structure for AGMD process. The resultant GQDs/PVDF nanofibrous presented a slight decrease in water contact angle and considerable increase in liquid entry pressure of water (LEPw). The sample containing 0.25 wt.% GQDs exhibited porosity of > 90%, LEPw of > 135 kPa, mean average surface roughness of 189.24 nm and ...
Source: Chemical Engineering and Processing: Process Intensification - March 14, 2018 Category: Chemistry Source Type: research

Pressure drop and heat transfer properties of cubic iso-reticular foams
Publication date: Available online 12 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Núria F. Bastos Rebelo, Kari Anne Andreassen, Luis I. Suarez Ríos, Juan C. Piquero Camblor, Hans-Jörg Zander, Carlos A. Grande With the aid of additive manufacturing is now possible to create customized reactors and reactor internals with desired targeted properties that can be used for multiple purposes in reaction and separation processes. One interesting possibility regarding manufacture of foams is indeed the possibility to construct fully iso-reticular foams where the res...
Source: Chemical Engineering and Processing: Process Intensification - March 13, 2018 Category: Chemistry Source Type: research

Study on the combustion of micro organic dust particles in random media with considering effect of thermal resistance and temperature difference between gas and particles
Publication date: Available online 10 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Mehdi Bidabadi, Qingang Xiong, Mohammadali Harati, Ebrahim Yaghoubi, Mohammad Hossein Doranehgard, Alireza Rahbari This paper presents an analytical model to investigate the effect of randomly distributed micro-organic dust particles on the flame propagation through the combustible mixture by considering the thermal resistance and temperature difference between the gas and the particles. The effect of thermal resistance on flame characteristics is intended by the dimensionless Biot number. It is...
Source: Chemical Engineering and Processing: Process Intensification - March 11, 2018 Category: Chemistry Source Type: research

Volatization & amp; combustion of biomass particles in random media: Mathematical modeling and analyze the effect of lewis number
Publication date: Available online 9 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Mehdi Bidabadi, Mohammadali Harati, Qingang Xiong, Ebrahim Yaghoubi, Mohammad Hossein Doranehgard, Pouria Aghajannezhad In this work, a mathematical model is proposed to model volatilization and combustion of micro organic dust particles. In contrast with previous studies, random combustion of Biomass particles (Lycopodium) and analyze the effect of different Lewis number on the combustion properties is investigated. It is assumed that flame structure is consisted of preheat or volatilization zon...
Source: Chemical Engineering and Processing: Process Intensification - March 10, 2018 Category: Chemistry Source Type: research

Study of oily sludge pyrolysis combined with fine particle removal using a ceramic membrane in a fixed-bed reactor
Publication date: Available online 8 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Ningbo Gao, Xiao Wang, Cui Quan, Chunfei Wu Oil sludge is one of solid wastes that produced in the oil industry. Pyrolysis has been considered as an attractive technology for oil recovery. However, solid fine particles could be generated during process of oil sludge pyrolysis that could cause fouling and blockage in downstream equipment and connections. In this work, a ceramic membrane was used in the reactor to filter the fine particles in the product gas. The influence of temperatures on the co...
Source: Chemical Engineering and Processing: Process Intensification - March 9, 2018 Category: Chemistry Source Type: research

The effect of different operational parameters on Hydrogen rich syngas production from biomass gasification in a dual fluidized bed gasifier
Publication date: Available online 9 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Ebrahim Yaghoubi, Qingang Xiong, Mohammad Hossein Doranehgard, Mehdi Mihandoust Yeganeh, Gholamreza Shahriari, Mehdi Bidabadi Biomass energy will be a crucial constitution of renewable energy in the future and hydrogen production from biomass on a large scale may contribute to a renewable development of energy. However, due to high-energy consumption in all technologies of hydrogen production from biomass, progress is impeded and this technology remaining restricted to a laboratory scale. In this...
Source: Chemical Engineering and Processing: Process Intensification - March 9, 2018 Category: Chemistry Source Type: research

Dispersion of supercritical carbon dioxide to [Emim][BF4] with a T-junction microtube connector
Publication date: Available online 8 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Kang Qin, Kai Wang, Rui Luo, Yang Li, Tao Wang The two-phase mixtures organized by ionic liquids (ILs) and carbon dioxide (CO2) are green systems for creation and purification of fine chemicals and natural products. Owing to the very low vapor pressure of ILs, the mixture of supercritical CO2 (ScCO2) and IL has asymmetrical solubility, which is special for engineering application. However, due to the high viscosity of IL and the large density difference between IL and ScCO2, they are difficult to...
Source: Chemical Engineering and Processing: Process Intensification - March 8, 2018 Category: Chemistry Source Type: research

Dispersion Characteristics of Biodiesel Spray Droplets in Top-Blown Injection Smelting Process
In this study, we developed a two-phase numerical model to simulate the top-blown injection copper smelting process and we examined the dispersion characteristics of biodiesel spray droplets ejected from the lance nozzle tip immersed in water. The dispersion characteristics of the biodiesel spray droplets were examined at various air-fuel ratios and calculation model was verified by test. The results show that spray tip penetration distance of the biodiesel spray droplets increases while the mean diameter decreases with an increase in the atomized air velocity. The axial velocity of the atomized air is significantly reduce...
Source: Chemical Engineering and Processing: Process Intensification - March 6, 2018 Category: Chemistry Source Type: research

Additive manufacturing of packings for rotating packed beds
Publication date: Available online 3 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Konrad Gładyszewski, Mirko Skiborowski HIGEE technology and rotating packed beds (RPB) in specific, gained a lot of interest for industrial processes intensification in recent years. Yet, most of the investigations were restricted to wire meshes and foam packings, as manufacturing methods for commercial structured packings in column applications do not immediately meet the specific requirements in an RPB. The comparable low volume and unconventional form of the packing call for tailored packing ...
Source: Chemical Engineering and Processing: Process Intensification - March 4, 2018 Category: Chemistry Source Type: research

Two-dimensional heat and mass transfer and thermodynamic analyses of porous microreactors with Soret and thermal radiation effects-An analytical approach
Publication date: Available online 1 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Graeme Hunt, Mohsen Torabi, Lilian Govone, Nader Karimi, Amirfarhang Mehdizadeh Transport of heat and mass and the thermodynamics of porous microreactors with thermal diffusion and radiation effects are investigated analytically. The examined configuration includes an axisymmetric, thick-wall microchannel with an iso-flux thermal boundary condition imposed on the external surfaces. The microchannel is filled with porous materials and accommodates a zeroth order homogenous chemical reaction. Inter...
Source: Chemical Engineering and Processing: Process Intensification - March 2, 2018 Category: Chemistry Source Type: research

Ethane oxidative dehydrogenation to ethylene in a membrane reactor with asymmetric ceramic membranes
Publication date: Available online 1 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Margarita Ermilova, Alexey Kucherov, Natalia Orekhova, Elena Finashina, Leonid Kustov, Andrey Yaroslavtsev The process of oxidative dehydrogenation of ethane (ODE) was carried out in a catalytic membrane reactor-distributor on a Mo-V-Te-Ox catalyst supported on asymmetric ceramic membranes. The obtained results show the obvious advantages of ODE with the use of a membrane system. Application of the membrane approach allows us to use initial gas mixtures with the O2:C2H6 ratios that are unacceptab...
Source: Chemical Engineering and Processing: Process Intensification - March 2, 2018 Category: Chemistry Source Type: research

Non-thermal Gas-phase Pulsed Corona Discharge for Lignin Modification
Publication date: Available online 1 March 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Alexander Sokolov, Lucas Lagerquist, Patrik Eklund, Marjatta Louhi-Kultanen Lignin has the potential to become a significant resource of renewable aromatics for the chemical industry. The current work studies pulsed corona discharge (PCD) as an alternative method for lignin modification. The effect of initial lignin concentration and gas phase composition on aldehydes formation was studied experimentally. Kraft lignin was used as a test compound. It was concluded in the work, that treatment in lo...
Source: Chemical Engineering and Processing: Process Intensification - March 2, 2018 Category: Chemistry Source Type: research

Study on Flow Field Characteristics in a Reverse Rotation Cyclone with PIV
This study adopted particle image velocimetry (PIV) to understand flow-field movements in the conventional cyclone and reverse-rotation cyclone (RC). Tracer particles were prepared by preparing a 5-wt% sugar solution at normal temperature and pressure for velocity measurement, cloud and distribution velocity maps were generated at various flow rates using three cross-sections. Compared with conventional cyclone, the PIV testing results indicate that the tangential and radial velocities of RC increased at higher flow rates and decreased at lower heights, suggesting adequate radially symmetric distributions despite variation...
Source: Chemical Engineering and Processing: Process Intensification - February 26, 2018 Category: Chemistry Source Type: research

Mixing enhancement in microchannels using thermo-viscous expansion by oscillating temperature wave
Publication date: Available online 24 February 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): A.H. Meghdadi Isfahani, Ramin Nasehi, Ebrahim Shirani The aim of this paper is to use the thermo-viscous expansion-contraction effect to enhance mixing in microchannels. To do this, numerical simulation of chaos flow generated by periodic thermal boundary condition in a 2-D microchannel is considered.The main objectives are to evaluate the effect of Reynolds number, Strouhal number and thermal penetration length on chaotic mixing. The vorticity is used as a criteria evaluating the chaos. It i...
Source: Chemical Engineering and Processing: Process Intensification - February 25, 2018 Category: Chemistry Source Type: research

Convective heat transfer enhancement in a pitted microchannel by stimulation of magnetic nanoparticles
Publication date: Available online 23 February 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Ehsan Karami, Masoud Rahimi, Neda Azimi Convective ferrofluid heat transfer in a microchannel under static (SMF) and rotating magnetic fields (RMF) has been investigated. The microchannel has a cylindrical pit in which a heat source with a constant heat flux is applied on the bottom wall. The top wall of pit is positioned next to a rotational permanent magnet that creates RMF, while it is stationary for SMF. The heat transfer characteristic results at various flow rates, magnetic field induct...
Source: Chemical Engineering and Processing: Process Intensification - February 24, 2018 Category: Chemistry Source Type: research

Vapor Split Manipulation in Extractive Divided-Wall Distillation Columns
Publication date: Available online 22 February 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): William L. Luyben Several alternative process equipment configurations have recently been proposed to replace the conventional two-column extractive distillation process. One interesting configuration features a single column with a divided wall running from the stripping section all the way two the top of the column. There is only one reboiler at the base of the column, but each of the segregated upper sections has its own independent condenser, reflux and distillate product. The vapor split...
Source: Chemical Engineering and Processing: Process Intensification - February 23, 2018 Category: Chemistry Source Type: research

Large scale emulsification of turmeric oil in skimmed milk using different cavitational reactors: A comparative analysis
Publication date: Available online 21 February 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Leena Patil, Parag R. Gogate The present work investigates the use of different cavitational reactors for obtaining stable emulsion of turmeric oil in skimmed milk comparing the efficacy in terms of the droplet size distribution and energy requirements. The effect of different operating parameters such as ultrasonic power in the case of flow cell, inlet pressure in the case of hydrodynamic cavitation and speed of rotation in the case of high speed homogenizer (HSH) on the droplet size and sta...
Source: Chemical Engineering and Processing: Process Intensification - February 22, 2018 Category: Chemistry Source Type: research

Separation of benzene and cyclohexane by extractive distillation intensified with ionic liquid
Publication date: Available online 21 February 2018 Source:Chemical Engineering and Processing - Process Intensification Author(s): Wenxue Li, Bo Xu, Zhigang Lei, Chengna Dai The separation of benzene and cyclohexane by extractive distillation was intensified with the addition of ionic liquid (IL) as entrainer. The IL [EMIM][BF4] was chosen in terms of selectivity and solvent capacity. Vapor-liquid equilibrium (VLE) experiments using pure N-methyl-2-pyrrolidinone (NMP), the NMP and IL mixture, pure sulfolane, and the sulfolane and IL mixture, were conducted. The VLE results indicated that NMP is more suitable than sulfola...
Source: Chemical Engineering and Processing: Process Intensification - February 21, 2018 Category: Chemistry Source Type: research

Integrated oxidation process and biological treatment for highly concentrated petrochemical effluents: A review
Publication date: March 2018 Source:Chemical Engineering and Processing - Process Intensification, Volume 125 Author(s): Mitra Bahri, Alireza Mahdavi, Amir Mirzaei, Alireza Mansouri, Fariborz Haghighat Biological treatments are the most widely used method in petrochemical complexes to treat wastewaters. However, they are not always effective, especially when refractory nature of certain organic contaminants is introduced into the system. A more promising method, therefore, is the one in which the biological treatment is integrated with the chemical methods where the primary contaminants are first converted into biodegrada...
Source: Chemical Engineering and Processing: Process Intensification - February 21, 2018 Category: Chemistry Source Type: research