Implementation and long term experiences with a continuous hygienisation process in food industry - - a case study
Publication date: Available online 22 February 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): D. Wöss, M. Ortner, J. Mensik, R. Kirchmayr, A. Schumergruber, T. PröllAbstractA three tonne/hour batch-type hygienisation process for animal waste was replaced by a fully continuous process including heat integration. The plant is embedded into a pig abattoir including an anaerobic digestion (biogas) plant and gas-engine-based combined heat and power (CHP) production. Pre-heating is done in a series of four tube bundle apparatuses with heat transferred from the hot treated animal was...
Source: Chemical Engineering and Processing: Process Intensification - February 23, 2019 Category: Chemistry Source Type: research

Augmented mass transfer in liquid-liquid flow through microchannels of different geometries
Publication date: March 2019Source: Chemical Engineering and Processing - Process Intensification, Volume 137Author(s): Uttam Kumar, Debashis Panda, Koushik Guha BiswasAbstractAn exhaustive study of various flow patterns that occurs in liquid-liquid flow along with detailed mass transfer study in micro-domain has been presented. Experimental studies on mass transfer have been performed using a hydrocarbon phase (toluene) from which extraction of acetic acid was done using water as a solvent in co-current flow. The same liquid-liquid systems (toluene-acetic acid-water) have been used for flow pattern study. Two channel diam...
Source: Chemical Engineering and Processing: Process Intensification - February 23, 2019 Category: Chemistry Source Type: research

Mixing efficiency studies in an airlift bioreactor with helical flow promoters for improved reactor performance
Publication date: Available online 19 February 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Riikka Särkelä, Tero Eerikäinen, Juha-Pekka Pitkänen, Sandip BankarAbstractCultivation of aerobic microorganisms typically requires rapid, but gentle and simultaneously energy efficient mixing in bioreactors to prevent high gradients between local concentrations. The mixing efficiency in a pilot scale airlift bioreactor with helical flow promoters was investigated with varying air inputs. Helical flow promoters were helical tubes attached to riser or downcomer, or both and b...
Source: Chemical Engineering and Processing: Process Intensification - February 20, 2019 Category: Chemistry Source Type: research

Augmentedmass transfer in liquid-liquid flow through microchannels of different geometries
Publication date: Available online 19 February 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Uttam Kumar, Debashis Panda, Koushik Guha BiswasAbstractAn exhaustive study of various flow patterns that occurs in liquid-liquid flow along with detailed mass transfer study in micro-domain has been presented. Experimental studies on mass transfer have been performed using a hydrocarbon phase (toluene) from which extraction of acetic acid was done using water as a solvent in co-current flow. The same liquid-liquid systems (toluene-acetic acid-water) have been used for flow pattern study. Two c...
Source: Chemical Engineering and Processing: Process Intensification - February 20, 2019 Category: Chemistry Source Type: research

Editorial Board
Publication date: February 2019Source: Chemical Engineering and Processing - Process Intensification, Volume 136Author(s): (Source: Chemical Engineering and Processing: Process Intensification)
Source: Chemical Engineering and Processing: Process Intensification - February 19, 2019 Category: Chemistry Source Type: research

Downer Fluidized Bed Reactor Modeling for Catalytic Propane Oxidative Dehydrogenation with High Propylene Selectivity
This study reports a simulation of the catalytic propane oxidative dehydrogenation (PODH) in a circulating fluidized bed downer reactor. A relevant kinetics based on experimental work by the authors [1], developed in a fluidized CREC Riser Simulator is considered. As well, Computational Particle Fluid Dynamics (CPFD) models featuring either “Particle Clusters” or “Single Particles” flows are implemented. The CPFD results obtained in a 20-m length unit show a 28% propane total conversion and 93% propylene selectivity using the “Single Particle” flow model. However, and once the more rigor...
Source: Chemical Engineering and Processing: Process Intensification - February 16, 2019 Category: Chemistry Source Type: research

Comparison of combustion efficiency between micro combustors with single- and double-layered walls: a numerical study
In this study, a micro combustor with double-layered walls was proposed for micro energy and power systems. SiC and quartz were selected for the inner and outer layers of combustor walls, respectively. Numerical investigation demonstrates that the double-layered micro combustor can achieve a higher combustion efficiency at large inlet velocity than single-layered SiC and quartz micro combustors. It is revealed that the heat recirculation effect of double-layered micro combustor is greatly enhanced compared to quartz combustor; meanwhile, the heat loss rate is decreased to some extent compared to SiC combustor. Moreover, th...
Source: Chemical Engineering and Processing: Process Intensification - February 13, 2019 Category: Chemistry Source Type: research

Optimization of Coating Processes of Mini Tablets with Polyvinylpyrrolidone Solutions in an Acoustic Levitator
Publication date: Available online 11 February 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Doris L. Wong, Sinh Christopher Müller, Artur Idt, Andreas Reinbeck, Hans-Ulrich Moritz, Werner PauerAbstractThe aim of the current study is to optimize the bed fluidized coating process of mini tablets by means of an acoustic levitator. The optimized coating parameters, which have to be set in a fluidized bed reactor, can be determined by means of contactless levitation of a single mini tablet in an acoustic levitator equipped with an ultrasonic atomizer. Mini tablets were positioned in a...
Source: Chemical Engineering and Processing: Process Intensification - February 12, 2019 Category: Chemistry Source Type: research

Impure ions removal from multicomponent leach solution of nickel sulfide concentrates by solvent extraction in impinging stream rotating packed bed
Publication date: Available online 4 February 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Jun Chang, Fukang Jia, C. Srinivasakannan, Kathryn A. Mumford, Xiaohong YangAbstractIn order to separate zinc, manganese and copper from a mixed chloride solution containing nickel and cobalt, solvent extraction with Di-2-ethylhexylphosphoric acid (D2EHPA) was investigated using an Impinging Stream–Rotating Packed Bed (IS–RPB) contactor in laboratory scale. The effects of operating parameters, such as equilibrium pH, ratio of aqueous to organic flow rates, rotation speed and concentr...
Source: Chemical Engineering and Processing: Process Intensification - February 5, 2019 Category: Chemistry Source Type: research

Multi-scale Modeling and Simulation of a Novel Membrane Reactor (MR)/Adsorptive Reactor (AR) Process
The objective of this study is the modeling and simulation of a novel process, consisting of a membrane reactor (MR)/adsorptive reactor (AR) sequence that intensifies equilibrium-limited reactions and associated separation processes. A comprehensive, multi-scale, multiphase, steady-state/dynamic, computational fluid dynamics (CFD)-based process model is developed, that quantifies the many underlying complex physicochemical phenomena occurring at the pellet, and reactor scales. Model simulations are then carried-out, to study the influence of the individual units’ operating and design parameters on overall system perf...
Source: Chemical Engineering and Processing: Process Intensification - February 3, 2019 Category: Chemistry Source Type: research

Intensification of liquid-liquid extraction in a tubular sono-extractor using 1.7 MHz ultrasound and SiO2 nanoparticles
Publication date: Available online 2 February 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Neda Azimi, Masoud Rahimi, Mohammad Mehdi Khodaei, Mahdi Roshani, Ehsan Karami, Ebrahim Ebrahimi, Faezeh MohammadiAbstractThe purpose of the present study is to investigate the effect of high-frequency ultrasound propagation in a sono-extractor to augment liquid-liquid mass transfer in the presence of SiO2 nanoparticles. For this purpose, four 1.7 MHz ultrasound transducers are placed on the body of the sono-extractor and the effect of transducer locations on the mass transfer characteris...
Source: Chemical Engineering and Processing: Process Intensification - February 3, 2019 Category: Chemistry Source Type: research

3D numerical simulation and optimization of honeycomb regenerators with parallel or crosswise arrangement of circular holes
Publication date: Available online 31 January 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Yonghua You, Zhongda Wu, Bin Li, Zhuang Zhang, Shuting Pan, Xuecheng XuAbstractIn the present work, with User-Defined Functions compiled to express the alternate and opposite flow of air and flue gas, 3D numerical model based on ANSYS Fluent is constructed for ceramic honeycomb regenerators. The fundamental of the complex heat transfer in honeycomb regenerators is analyzed with temperature contours and curves. The effects of regenerator length (L) and switch time (τ) on thermal and hydraulic...
Source: Chemical Engineering and Processing: Process Intensification - February 2, 2019 Category: Chemistry Source Type: research

Transport of gas molecules through dense membranes and intensification of mass transfer by radiation
Publication date: Available online 31 January 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): V. Levdansky, M. Šyc, P. IzákABSTRACTIt is known that fouling of membranes decreases their performance. New modern types of membranes which are used for separation of gas mixtures (e.g. supported ionic liquid and graphene-based membranes) require the methods for cleaning which differ from the methods used in classical membrane technology (e.g. backflushing). Mass transfer in these membranes can be blocked by the adsorbed foreign gas molecules or/and aerosol nanoparticles which are ...
Source: Chemical Engineering and Processing: Process Intensification - February 2, 2019 Category: Chemistry Source Type: research

Intensification of ceftriaxone degradation under UV and solar light irradiation in presence of phosphors based structured catalyst
Publication date: Available online 30 January 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Olga Sacco, Vincenzo Vaiano, Luigi Rizzo, Diana SanninoAbstractPhosphors based photocatalyst (Nitrogen-doped TiO2 coupled with ZnS blue phosphors) immobilized on macroscopic polystyrene pellets was studied in the removal of ceftriaxone (third-generation β-lactam antibiotic) from water. The phosphors based structured photocatalyst was prepared using the solvent assisted procedure. According to spectroscopic and morphological characterization, the photocatalyst particles resulted effectively ...
Source: Chemical Engineering and Processing: Process Intensification - January 31, 2019 Category: Chemistry Source Type: research

Microwave-assisted extraction of phenolics from pomegranate peels: Optimization, kinetics, and comparison with ultrasounds extraction
Publication date: Available online 24 January 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Kyriakos Kaderides, Lygeri Papaoikonomou, Melania Serafim, Athanasia M. GoulaAbstractRecently, there has been much interest in the phenolics of pomegranate peels, because of their health benefits, such as antioxidant activity. Thus, the objective of this work is to optimize an efficient alternative and “green” technique for the extraction of phenolics from pomegranate peels. Microwave-assisted method was found to increase extraction yield, but mainly to shorten the treatment time by ...
Source: Chemical Engineering and Processing: Process Intensification - January 24, 2019 Category: Chemistry Source Type: research

Experimental investigation of heat transfer enhancement in straight and U-bend double-pipe heat exchanger with wire insert
Publication date: February 2019Source: Chemical Engineering and Processing - Process Intensification, Volume 136Author(s): Rafał Andrzejczyk, Tomasz Muszynski, Przemyslaw KozakAbstractIn this paper, the possibility of heat transfer enhancement in the U-bend exchanger was presented. Experimental research has been carried out for four individual heat exchanger constructions i.e. plain tube in tube, turbulized tube in tube, plain U-bend and U-bend with turbulator. Also, heat transfer experiments for various boundary conditions were performed to obtain reference values. In case of U-bend exchanger with and without turbulator,...
Source: Chemical Engineering and Processing: Process Intensification - January 24, 2019 Category: Chemistry Source Type: research

Performance comparison of different membrane reactors for combined methanol synthesis and biogas upgrading
Publication date: Available online 17 January 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Khunnawat Ountaksinkul, Paravee Vas-Umnuay, Nattapong Kasempremchit, Palang Bumroongsakulsawat, Pattaraporn Kim-Lohsoontorn, Tara Jiwanuruk, Suttichai AssabumrungratAbstractThe computational fluid dynamic (CFD) models of a planar membrane micro-structured reactor (MMR) and a triple pipe tubular membrane reactor (TMR) were established via COMSOL Multiphysics 5.3a in order to propose a reactor combining methanol synthesis and biogas upgrading simultaneously. The simulated results under predetermin...
Source: Chemical Engineering and Processing: Process Intensification - January 18, 2019 Category: Chemistry Source Type: research

Supersonic separation technology for natural gas processing: A review
Publication date: Available online 15 January 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Xuewen Cao, Jiang BianAbstractSupersonic separation technology is a new approach to condense and separate water, heavy hydrocarbons and other impurities from natural gas. This paper reviews the research advances in condensation characteristics of the Laval nozzle and separation mechanism of the supersonic separator in detail from the perspectives of theoretical analysis, experiments and numerical simulation, and summarizes the new application of this technology including natural gas liquefaction...
Source: Chemical Engineering and Processing: Process Intensification - January 16, 2019 Category: Chemistry Source Type: research

Multi-objective optimization of intensified processes for the purification of levulinic acid involving economic and environmental objectives
Publication date: Available online 15 January 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Heriberto Alcocer-García, Juan Gabriel Segovia-Hernández, Oscar Andrés Prado-Rubio, Eduardo Sánchez-Ramírez, Juan José Quiroz-RamírezAbstractLevulinic acid obtained from acid hydrolysis of lignocellulosic biomass is considered within the twelve main chemicals from biomass in terms of economic potential due to its large number of applications. As product of hydrolysis is obtained a quite diluted stream which contains a lot of water. Consequently, t...
Source: Chemical Engineering and Processing: Process Intensification - January 16, 2019 Category: Chemistry Source Type: research

Epoxidation of methyl oleate in a rotor-stator spinning disc reactor
This study shows that the RSSDR with its very good heat and mass transfer properties allows to significantly intensify epoxidation of fatty acid methyl esters. (Source: Chemical Engineering and Processing: Process Intensification)
Source: Chemical Engineering and Processing: Process Intensification - January 12, 2019 Category: Chemistry Source Type: research

Facile Fabrication of Thermosensitive Hydrogel Microspheres Based on a Combination of Metal-Free Click Chemistry and Spray Drying
In this study, thermosensitive hydrogel microspheres were fabricated by green, one-step spray drying, in which crosslinking points were formed in situ via a metal-free 1,3-dipolar cycloaddition click reaction. First, terpolymers were synthesized by the free radical copolymerization of hydroxyethyl methacrylate, N-isopropyl acrylamide, and N, N-dimethylacrylamide in a solution of 1,4-dioxane with 2,2-azobis(2-methylpropionitrile) as an initiator. Second, polymeric dipoles and polymeric dipolarophiles were prepared by modifying the as-prepared terpolymers with azidoacetic acid and N-maleoyl alanine, respectively. Finally, th...
Source: Chemical Engineering and Processing: Process Intensification - January 11, 2019 Category: Chemistry Source Type: research

Design and Optimization of Multi-Effect-Evaporation-assisted Distillation Configuration for Recovery of 2,3-butanediol from Fermentation Broth
In this study, several novel multi-effect-evaporation-assisted distillation (MEED) configurations are proposed to improve the energy efficiency of 2,3-BDO production from a fermentation broth. The binary interaction parameters between 2,3-BDO and water were determined through regression using experimental data. All configurations were designed and optimized using the sequential quadratic programming methodology. The results indicate that the proposed MEED configurations can create the synergistic effect by combining the multi-effect evaporator and distillation processes, which is able to increase substantial energy efficie...
Source: Chemical Engineering and Processing: Process Intensification - January 8, 2019 Category: Chemistry Source Type: research

Experimental investigation of heat transfer enhancement in straight and U-bend double-pipeheat exchanger with wire insert
Publication date: Available online 8 January 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Rafał Andrzejczyk, Tomasz MuszynskiAbstractIn this paper, the possibility of heat transfer enhancement in the U-bend exchanger was presented. Experimental research has been carried out for four individual heat exchanger constructions i.e. plain tube in tube, turbulized tube in tube, plain U-bend and U-bend with turbulator. Also, heat transfer experiments for various boundary conditions were performed to obtain reference values. In case of U-bend exchanger with and without turbulator, tests were ...
Source: Chemical Engineering and Processing: Process Intensification - January 8, 2019 Category: Chemistry Source Type: research

On the kinetics of Mn2O3/ZrO2 oxygen carrier for chemical looping air separation
Publication date: Available online 3 January 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Yang Cao, Boshu He, Wenxiao Tong, Huifeng Yao, Zhipeng DuanAbstractChemical looping air separation (CLAS) is a novel oxygen generation technology with relatively small energy penalty. Thereby, CLAS can be efficiently integrated with the oxy-fuel combustion and the integrated gasification combined cycle (IGCC) technologies. The Mn-based oxygen carrier (OC) is a promising candidate for the CLAS process in the OC family, but its reactivity and stability are still unclearly determined. In this work, ...
Source: Chemical Engineering and Processing: Process Intensification - January 3, 2019 Category: Chemistry Source Type: research

Numerical study of mixing in wavy micromixers: comparison between raccoon and serpentine mixer
Publication date: Available online 28 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Bappa Mondal, Sumit Kumar Mehta, Promod Kumar Patowari, Sukumar PatiAbstractWe numerically analyze the mixing and pressure drop characteristics for flow through wavy micromixer of two geometrical configurations, namely raccoon and serpentine for different values of amplitude of the waviness of the mixer (α), wavelength of the waviness (λ), Reynolds number(Re) and Schmidt number(Sc). Three different flow regimes are identified depending on the parameters influencing the mixing index...
Source: Chemical Engineering and Processing: Process Intensification - December 29, 2018 Category: Chemistry Source Type: research

Lift-off flames of propane under a variety of co-flow conditions
This study aimed at understanding the effects of co-flow condition on lift-off characteristics of the propane jet flame. A co-flow burner system was used to provide free jet condition, air co-flow condition and vitiated co-flow condition. In vitiated co-flow, methane was the co-flow fuel, and the co-flow equivalence ratios of methane/air mixtures changed from 0.5 to 0.7. On the basis of the results, the flame issuing into air-co-flow showed a higher lift-off height compared to the flame not issuing into a co-flow (i.e. free jet condition), with a faster increment rate simultaneously. In the vitiated co-flow condition, a co...
Source: Chemical Engineering and Processing: Process Intensification - December 29, 2018 Category: Chemistry Source Type: research

Preparation of fluorescent waterborne polyurethane nanodispersion by high-gravity miniemulsion polymerization for multifunctional applications
This study demonstrated that the newly developed high-gravity miniemulsion polymerization method provides an effective route to waterborne PU nanodispersion for multifunctional applications.Graphical abstract (Source: Chemical Engineering and Processing: Process Intensification)
Source: Chemical Engineering and Processing: Process Intensification - December 28, 2018 Category: Chemistry Source Type: research

Stability of nanobubbles generated in water using porous membrane system
Publication date: Available online 24 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Karol Ulatowski, Paweł Sobieszuk, Andrzej Mróz, Tomasz CiachAbstractThe focus of this work was to examine the stability of gas nanobubbles in water. The generation of nanobubbles was carried out in two porous-membrane modules for two distinct values of liquid flow rate. Gas phase was nitrogen or oxygen, and the liquid phase was distilled water. Samples of nanodispersions were stored for 10 to 35 days. Half of them were stored open and other half closed to ensure or deny contact with the...
Source: Chemical Engineering and Processing: Process Intensification - December 25, 2018 Category: Chemistry Source Type: research

Solvent extraction performance of Sm (III) using a T-junction microreactor with 2-ethylhexyl phosphonic acid mono-2-ethylhexyl (EHEHPA)
Publication date: Available online 23 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Yuan He, Yangqing Zeng, Kaihua Chen, Ehsan Ullah, Shiwei Li, Libo Zhang, Shaohua Yin, Shenghui Guo, Bingjie Jin, Shanshan RenAbstractSolvent extraction of samarium (III) from hydrochloric acid solution using a T-junction microreactor, with 2-ethylhexyl phosphonic acid mono-2-ethylhexyl (EHEHPA or P507) as the extractant has been investigated. Initially, the effect of aqueous pH, channel width, and channel length on the extraction of samarium was analyzed, and the maximum extraction efficiency (...
Source: Chemical Engineering and Processing: Process Intensification - December 24, 2018 Category: Chemistry Source Type: research

An overview on the process intensification of microchannel reactors for biodiesel production
Publication date: Available online 21 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): N. Yasvanthrajan, Abhinandan Nabera, Saman Salike, D.T. Valan, P. Sivakumar, K. Muthukumar, A. ArunagiriAbstractBiodiesel produced from esterification or transesterification of oils from renewable energy sources is the only alternate to liquid fuels and can be directly used in currently existent diesel engines. The cost of biodiesel is an important issue and the commercial production of biodiesel should require low energy and minimum downstream steps. The intensification of biodiesel production...
Source: Chemical Engineering and Processing: Process Intensification - December 21, 2018 Category: Chemistry Source Type: research

Editorial Board
Publication date: January 2019Source: Chemical Engineering and Processing - Process Intensification, Volume 135Author(s): (Source: Chemical Engineering and Processing: Process Intensification)
Source: Chemical Engineering and Processing: Process Intensification - December 21, 2018 Category: Chemistry Source Type: research

Transesterification of Vegetable Oil with Methanol Using Solid Base Catalyst of Calcium Oxide under Ultrasonication
Publication date: Available online 19 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Yoshihiro Kojima, Shinya TakaiAbstractTransesterification of vegetable oil with methanol using calcium oxide as a solid base catalyst was carried out under ultrasonication and mechanical stirring conditions, and the transesterification rates were compared. In addition, the effects of ultrasonic power, catalyst mass and molar ratio of methanol to oil on methanolysis rate of oil under ultrasonication were investigated. The biodiesel yield reached 88% at about 2.5 and 5 hrs under ultrasonic...
Source: Chemical Engineering and Processing: Process Intensification - December 20, 2018 Category: Chemistry Source Type: research

Ultrasound assisted intensified production of biodiesel from sustainable source as karanja oil using interesterification based on heterogeneous catalyst (γ-alumina)
Publication date: Available online 14 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Shubham S. Kashyap, Parag R. Gogate, Saurabh M. JoshiAbstractIntensification of ultrasound (US) assisted interesterification of karanja oil in the presence of γ-alumina as a heterogeneous catalyst was performed in current study. Effect of reaction conditions as reactant molar ratio, catalyst loading, duty cycle and temperature on the yield of FAME has been investigated. The catalyst used in the work, γ- alumina, is an acidic catalyst and hence is resilient to high FFA and water cont...
Source: Chemical Engineering and Processing: Process Intensification - December 15, 2018 Category: Chemistry Source Type: research

Heat Transfer Characteristics of Free Nanofluid Impinging Jet on Flat Surface with Different Jet to Plate Distance: An Experimental Investigation
Publication date: Available online 11 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Surendra D. Barewar, Shravan Tawri, Sandesh S. ChouguleAbstractIn the present study, the heat transfer characteristics of the impinging jet on the heated copper plate surface was investigated experimentally. Two different working coolants namely, DI water and aqueous Zinc oxide (ZnO) nanofluids with varying nanoparticle concentration (ϕ = 0.02%, 0.04%, 0.06%, and 0.1%) were used during the experiment. The ZnO nanofluids were synthesized by two-step methods. The experiments were c...
Source: Chemical Engineering and Processing: Process Intensification - December 12, 2018 Category: Chemistry Source Type: research

Removal of Ni (II) and Cr (III) by complexation-ultrafiltration using rotating disk membrane and the selective separation by shear induced dissociation
Publication date: Available online 7 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Qiang Zhang, Jing Gao, Yun-Ren QiuAbstractRemoval of Ni (II) and Cr (III) from aqueous solutions by complexation-ultrafiltration and the selective separation by shear induced dissociation were investigated using rotating disk membrane (RDM). Experiments were carried out as a function of pH and mass ratio of PAAS to metal (P/M) for the removal of Ni (II) and Cr (III) by polyacrylate sodium (PAAS) as complexing agent and the results revealed that the optimum conditions were pH 7.0 and P/M 25. Effe...
Source: Chemical Engineering and Processing: Process Intensification - December 9, 2018 Category: Chemistry Source Type: research

Dynamic Analysis and Modeling of Direct Contact Membrane Distillation for Water Desalination During Startup Using Linear System Theory
Publication date: Available online 7 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Emad AliAbstractThe transient performance of direct contact membrane distillation during startup was investigated using experimental data and theoretical modeling. The primary input, inlet hot temperature, caused a minor time delay in the output variable's dynamics because the dynamic of the former is not instantaneous. The minor input, inlet cold temperature, can cause disturbances in the system dynamics if it is not well controlled. Reaction curve methods revealed that the time constant of the...
Source: Chemical Engineering and Processing: Process Intensification - December 9, 2018 Category: Chemistry Source Type: research

Characteristics of liquid flow in a countercurrent rotating bed
Publication date: Available online 5 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Hangtian Li, Zhiguo Yuan, Youzhi Liu, Huijun LiuAbstractA rotating packed bed (RPB) is a new type of process intensification equipment. Its packing zone is an important mass transfer zone. However, the issue of liquid flow in the RPB remains unclear. In this work, the effects of rotational speed, liquid initial velocity in the cavity, and the packing zone of a countercurrent rotating bed on liquid phase flow patterns, droplet velocity, average droplet diameter, and droplet size distribution were...
Source: Chemical Engineering and Processing: Process Intensification - December 7, 2018 Category: Chemistry Source Type: research

Modeling and Analysis of New Reactor Concepts for Poly(ethylene terephthalate) Esterification Process
Publication date: Available online 3 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Tianqi Liu, Xueping Gu, Jiajun Wang, Lianfang FengAbstractTwo new reactor strategies for the continuous poly(ethylene terephthalate) esterification process are proposed for the purpose of intensifying the reaction performance according to different gas-liquid contact modes. Comprehensive mathematical models based on the kinetic and thermodynamic equations are developed to describe and examine two new reactor strategies and four existing industrial strategies. Simulation results of Zimmer esterif...
Source: Chemical Engineering and Processing: Process Intensification - December 4, 2018 Category: Chemistry Source Type: research

Qualitative relationships between structure and performance of rotating zigzag bed in distillation
Publication date: January 2019Source: Chemical Engineering and Processing - Process Intensification, Volume 135Author(s): Guang Q. Wang, Zhen J. Zhou, Yu M. Li, Jian B. JiAbstractRotating zigzag bed (RZB) is the centrifugal tray column, a counterpart to rotating packed bed (RPB) and has been commercialized in a number of distillation applications. In this paper, qualitative relationships between the structure and the performance of RZB rotor are studied to adjust its performance and optimize rotor structure. Several structural modifications of RZB rotor are analyzed, such as varying height of stationary baffles and blank r...
Source: Chemical Engineering and Processing: Process Intensification - December 4, 2018 Category: Chemistry Source Type: research

Synthesis and characterization of ZnSe and ZnSe:Mn nanosheets and microflowers with high photoactive properties by microwave-assisted method
Publication date: Available online 3 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Katarzyna Matras-Postołek, Svitlana Sovinska, Adam WęgrzynowiczAbstractZinc selenide (ZnSe) and manganese-doped zinc selenide (ZnSe:Mn) nanosheet and microflower morphologies were successfully fabricated in only 15-25 minutes in solvothermal reactions under microwave irradiation. In order to compare the effect of microwave heating on the properties of obtained ZnSe nanocrystals, the synthesis under conventional heating was conducted additionally in similar conditions. The obtained nanoc...
Source: Chemical Engineering and Processing: Process Intensification - December 3, 2018 Category: Chemistry Source Type: research

Atmospheric-pressure pulsed discharge plasma in capillary slug flow system for dye decomposition
In this study, the introduction of non-equilibrium atmospheric-pressure plasma in a slug flow reactor system is demonstrated as a chemical reaction medium. The water containing Coomassie Brilliant Blue R − 250 (CBB) and various gas species are used as the liquid and gas phases, respectively, which are flown at 1.5 and 0.5 mL/min. The optical emission spectra indicate that different reactive oxidation species are generated by each gas when the pulsed discharge plasma is applied to the slug flow reactor system. The oxygen-base reactive species are found in abundance. The decoloration of CBB seems t...
Source: Chemical Engineering and Processing: Process Intensification - December 2, 2018 Category: Chemistry Source Type: research

Reverse flow reactors as sustainable devices for performing exothermic reactions: applications and engineering aspects
Publication date: Available online 1 December 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Pablo Marín, Fernando V. Díez, Salvador OrdóñezAbstractReverse flow reactors are fixed-bed reactors combining in a single intensified device chemical reaction and regenerative heat transfer (energy is stored in a bed as sensible heat). To accomplish this goal, reverse flow reactors are operated in a forced unsteady state created by periodically changing the flow direction. The most important applications of reverse flow reactor are reviewed: oxidation of hydrocarbons ...
Source: Chemical Engineering and Processing: Process Intensification - December 2, 2018 Category: Chemistry Source Type: research

Intensification of Hydrogen Adsorption by Novel Cu-BDC@rGO composite Material synthesized in a Microwave-assisted circular micro-channel
In this study, pure Cu-BDC and composite Cu-BDC@rGO were produced by combining microwave irradiation and microfluidics (MW-assisted microfluidic) to intensify the hydrogen adsorption. To compare two heating methods, pure Cu-BDC was synthesized by both MW-assisted microfluidic and conventional heating methods. Results showed that the production yield and hydrogen adsorption capacity of Cu-BDC was 18% and 26% greater for MW-assisted microfluidic heating, respectively. In addition to the results, this method brings some advantageous such as lower reaction time, lower reactor size, more uniform crystal shape, and lower crystal...
Source: Chemical Engineering and Processing: Process Intensification - November 30, 2018 Category: Chemistry Source Type: research

Improvement of the Butyl Acetate Process through Heat Integration: A Sustainability-Based Assessment
Publication date: Available online 28 November 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Patrick V. Mangili, Diego M. PrataAbstractThe heat integration of a conventional and a reactive distillation technologies for butyl acetate production is studied in this work. Different configurations were evaluated and compared to the original designs in terms of their sustainable performances. The comparison was carried out through the Eco-efficiency Comparison Index method by determining six ecological indicators (raw materials consumption, fuel consumption, energy consumption, CO2 emissions...
Source: Chemical Engineering and Processing: Process Intensification - November 29, 2018 Category: Chemistry Source Type: research

Heat transfer augmentation in double pipe water to air counter flow heat exchanger with helical surface disc turbulators
Publication date: Available online 28 November 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Saurabh Yadav, Santosh K. SahuAbstractPresent investigation reports the effect of helical surface disc turbulators (HSDTs) on heat transfer and pressure drop characteristics in double pipe heat exchanger (DPHE). HSDTs has been utilized in the annulus region. Tests are conducted by insertion of HSDTs with various operating parameters including three different diameter ratios (DR = do/Di = 0.42, 0.475 and 0.54), three different helix angles (ɸ = 20°,...
Source: Chemical Engineering and Processing: Process Intensification - November 29, 2018 Category: Chemistry Source Type: research

Microwave-induced Cracking and Reforming of Benzene on Activated Carbon
This study was conducted to convert tar generated during biomass pyrolysis/gasification to fuel gas through microwave process. Benzene was selected as a model tar, and the benzene reduction and produced-gas conversion characteristics were investigated for benzene cracking and CO2/steam reforming.The benzene conversion was the highest value of 99% when benzene cracking was performed, 98.5% when CO2 was supplied and 94% when steam was supplied. The produced-gas heating value was highest at 15 MJ/m3 for cracking, lowest at 4 MJ/m3 when CO2 was supplied, and 8.7 MJ/m3 when steam was supplied.In the case of...
Source: Chemical Engineering and Processing: Process Intensification - November 29, 2018 Category: Chemistry Source Type: research

Qualitative Relationship between Structure and Performance of Rotating Zigzag Bed in Distillation
Publication date: Available online 29 November 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Guang Q. Wang, Zhen J. Zhou, Yu M. Li, Jian B. JiAbstractRotating zigzag bed (RZB) is the centrifugal tray column, a counterpart to rotating packed bed (RPB) and has been commercialized in a number of distillation applications. In this paper, qualitative relationships between the structure and the performance of RZB rotor are studied to adjust its performance and optimize rotor structure. Several structural modifications of RZB rotor are analyzed, such as varying height of stationary baffles an...
Source: Chemical Engineering and Processing: Process Intensification - November 29, 2018 Category: Chemistry Source Type: research

Influencing Selectivity in the Oxidative Coupling of Methane by Modulating Oxygen Permeation in a Variable Thickness Membrane Reactor
Publication date: Available online 27 November 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Ojotule P. Onoja, Xiaodong Wang, Panagiotis N. KechagiopoulosAbstractThe Oxidative Coupling of Methane (OCM) has been considered for years as a promising alternative for the production of higher hydrocarbons, namely ethane and ethylene. Nonetheless, OCM’s inherent conversion-versus-selectivity limitations have not allowed till now for economical C2 yields to be achieved. Reactor engineering studies guided by a detailed mechanistic description of the reaction can directly contribute to obt...
Source: Chemical Engineering and Processing: Process Intensification - November 28, 2018 Category: Chemistry Source Type: research

Preparation of Fe(III)-MOFs by microwave-assisted ball for efficiently removing organic dyes in aqueous solutions under natural light
Publication date: January 2019Source: Chemical Engineering and Processing - Process Intensification, Volume 135Author(s): Ding Chen, Peng-fei Feng, Fu-hua WeiAbstractFe-based metal-organic frameworks(Fe(III)-MOFs)were synthesized by Fe2(SO4)3 and trimesic acid using microwave-assisted ball milling method. The structure of the Fe(III)-MOFs was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectrometry (FTIR). The thermostability of the MOFs was analyzed by thermogravimetric analysis (TGA). Fe(III)-MOFs were added in aqueous solutions to remove organic dyes. The r...
Source: Chemical Engineering and Processing: Process Intensification - November 28, 2018 Category: Chemistry Source Type: research

Solids flow pattern in continuous oscillatory baffled reactor
Publication date: Available online 26 November 2018Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Danijela Slavnić, Branko Bugarski, Nikola NikačevićAbstractTransition from batch to continuous processing is an attractive alternative for the production of pharmaceutical, fine and bio chemicals. In a number of such industrial reactions or separations, a solid phase is present either as a reactant, product or catalyst. Instead of conventional continuous reactors, the utilization of oscillatory flow reactors could be advantageous. The flow pattern of solids in a continuous oscillatory baffle...
Source: Chemical Engineering and Processing: Process Intensification - November 28, 2018 Category: Chemistry Source Type: research