An intensified technique for Lipase catalysed amide synthesis
Publication date: Available online 18 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Sneha R. Bansode, Virendra K. RathodAbstractThe enzymatic synthesis of propyl acetamide under the influence of sonication has been explored. The effect of various reaction parameters that drive the reaction was studied and optimised under solvent free condition to achieve maximum yield. At temperature 60 °C, mole ratio of propyl amine to butyl acetate 1:1.5, 3% (w/v) of lipase loading with ultrasound (US) frequency as 22 kHz, 100 W power of ultrasonic bath and with agitatio...
Source: Chemical Engineering and Processing: Process Intensification - July 19, 2019 Category: Chemistry Source Type: research

Application of Water Based Nanofluids in Bioscrubber for Improvement of Biogas Sweetening in a Pilot Scale
Publication date: Available online 17 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Seyyed Hamid Esmaeili-Faraj, Mohsen Nasr Esfahany, Mohammad Hossein Karimi DarvanjooghiAbstractIn this paper, comprehensive examinations were performed to investigate the effects of nanoparticles on sweetening of biogas which is produced in North Isfahan Waste Water Treatment Plant (NIWWTP) through novel bioscrubbing (BS) method in pilot scale. In the present study, two various nanofluids: Synthesized Silica-water nanofluid with nanoparticle mass fraction of 0.1 %wt. (SS100), and Exfoliated Graphen...
Source: Chemical Engineering and Processing: Process Intensification - July 18, 2019 Category: Chemistry Source Type: research

Formation of nanocrystalline BiFeO3 during heat treatment of hydroxides co-precipitated in an impinging-jets microreactor
Publication date: Available online 15 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): O.V. Proskurina, R.S. Abiev, D.P. Danilovich, V.V. Panchuk, V.G. Semeno, V.N. Nevedomsky, V.V. GusarovAbstractNanocrystalline bismuth orthoferrite was synthesized by heat treatment of hydroxides co-precipitated in a free impinging-jets microreactor (FIJMR). The formation of BiFeO3 nanoparticles without other phase impurities, with a narrow crystal size distribution and an average crystal size of about 20 nm, is shown to be possible after heat treatment at 420-440 °C of the hydroxi...
Source: Chemical Engineering and Processing: Process Intensification - July 16, 2019 Category: Chemistry Source Type: research

A systematic method for optimum heterogeneous azeotropic distillation systems with vapor recompression
Publication date: Available online 15 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Yufeng Fan, Qing Ye, Jingxing Chen, Xue Chen, Tong Liu, Hao CenAbstractIn this work, a systematic method is proposed to determine the optimum combination of self-heat recuperation technology (SHRT) and heterogeneous azeotropic distillation (HAD). The heat exchanger network and vapor recompression heat pump are applied to develop the energy-saving HAD process based on SHRT (HAD-SHRT). Then the heat exchanger network (HEN) is utilized to optimize HAD-SHRT process through minimizing the hot utility ut...
Source: Chemical Engineering and Processing: Process Intensification - July 16, 2019 Category: Chemistry Source Type: research

Reactive Mixing in Rotating Packed Beds: On the Packing’s Role and Mixing Modeling
In this study, the influence of packing depth, liquid distribution, and volumetric ratio on mixing processes are for the first time investigated in detail. It is shown that the packing seems to be more important at low volumetric ratios and an overlapping liquid distribution, but less important – or even interfering with fast mixing – at higher volumetric ratios and an opposite liquid distribution. Based on these findings, a promising novel type of HiGee equipment is suggested, that is particularly suitable for fast mixing at high volumetric ratios. Additionally, the linear and the exponential approaches of the...
Source: Chemical Engineering and Processing: Process Intensification - July 13, 2019 Category: Chemistry Source Type: research

Application of Breakthrough Curve Analysis and Response Surface Methodology for Optimization of a Hybrid Separation System Consisting of Fixed-bed Column Adsorption and Dead-end Depth Filtration
Publication date: Available online 12 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Mahdi Askari, Ehsan Salehi, Mohammad Ebrahimi, Aboulfazl BaratiAbstractThis work investigates the performance and optimization of a hybrid process consisting of a fixed-bed adsorption (FBA) column and a dead-end filtration (DEF) cell for the removal of methylene blue (MB) from water. Granular activated carbon and cellulose acetate depth filter sheets were used as adsorbent and filter medium, respectively. Effects of four operation parameters (initial concentration, feed flowrate, bed length, and fi...
Source: Chemical Engineering and Processing: Process Intensification - July 13, 2019 Category: Chemistry Source Type: research

Swing Processes for Solvent Regeneration in Liquid-Liquid Extraction of Succinic Acid
Publication date: Available online 11 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Lisette M.J. Sprakel, A.F.M. Holtkamp, R. Bassa, B. SchuurAbstractSolvent regeneration processes for liquid-liquid extraction of succinic acid (HSuc) from aqueous streams were investigated. Tri-n-octyl amine (TOA) and tri-n-octyl phosphine oxide (TOPO) in methyl isobutyl ketone (MIBK) showed good extraction. For 20 wt% TOA in MIBK, addition of pentane at anti-solvent-to-solvent ratio of 1 (vol/vol) decreased KD from 10.2 to 0.46, applying ethane at 30 bar decreased KD to 0.45 and incr...
Source: Chemical Engineering and Processing: Process Intensification - July 12, 2019 Category: Chemistry Source Type: research

Numerical Investigation on the Heat Transfer Characteristics of Liquid-Liquid Plug-Train in Microchannels
Publication date: Available online 9 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Bin Xu, Teck Neng Wong, Desheng Zhang, Xi Shen, Rongjun XuAbstractLiquid-liquid plug-train is of great importance due to its wide applications in the heat transfer enhancement and the richness of underlying physics. This paper presented a theoretical and numerical study of the liquid-liquid plug-train in a microchannel. Based on the analytical model of flow field, the heat transfer process in liquid-liquid plug-train was investigated. The constant surface temperature boundary condition was considere...
Source: Chemical Engineering and Processing: Process Intensification - July 10, 2019 Category: Chemistry Source Type: research

The influence of low-frequency magnetic field regions on the Saccharomyces cerevisiae respiration and growth
Publication date: Available online 9 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Itana Nuša Bubanja, Branka Lončarević, Marija Lješević, Vladimir Beškoski, Gordana Gojgić-Cvijović, Zoran Velikić, Dragomir StanisavljevAbstractThe influence of four low-frequency magnetic field (MF) ranges 10–300 Hz, 10–100 Hz, 10–50 Hz and 50–100 Hz in scanning regime (all frequencies from selected range were scanned during 100 s repetitively during 24 h) on baker’s yeast cells Saccharomyces cerevisi...
Source: Chemical Engineering and Processing: Process Intensification - July 10, 2019 Category: Chemistry Source Type: research

Investigation of flux attenuation and crystallization behavior in submerged vacuum membrane distillation (SVMD) for SWRO brine concentration
Publication date: Available online 8 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Tong Zou, Guodong Kang, Meiqing Zhou, Meng Li, Yiming CaoAbstractThis work studied the concentration of seawater reverse osmosis (SWRO) brine by a submerged vacuum membrane distillation (SVMD) process. Factors for flux attenuation including CaSO4 crystallization,vapour pressure depression, the increase of heat transfer resistance and membrane fouling were distinguished by the combination of experiment and theoretical calculation. It was suggested that CaSO4 crystallization was the main reason for fl...
Source: Chemical Engineering and Processing: Process Intensification - July 10, 2019 Category: Chemistry Source Type: research

The development of helical vortex pairs in oscillatory flows – A numerical and experimental study
Publication date: Available online 6 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): J.R. McDonough, S.M.R. Ahmed, A.N. Phan, A.P. HarveyAbstractWhen a liquid is oscillated in a tube containing a helical coil, there are two key flow phenomena: vortex-shedding and “swirl”. Together, they cause plug flow to be achievable over a wide range of conditions in this design. When an additional small cylindrical rod is placed in the centre of the helical coil, a new dual vortex regime is realised. This new flow regime was studied via CFD and PIV. It was demonstrated that a signifi...
Source: Chemical Engineering and Processing: Process Intensification - July 7, 2019 Category: Chemistry Source Type: research

Supergravity Process for Enriching and Separating Ag from Sn–Ag–Zn melts
Publication date: Available online 5 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Ning Zhang, Zhe Wang, Lei Guo, Long Meng, Zhancheng GuoAbstractThe feasibility of applying supergravity technology to enhance desilverization of crude Sn with Zn was studied using the model Sn–1.5Ag–xZn alloys. The solidification characteristics of the alloys were examined using differential scanning calorimetry and scanning electron microscopy. In addition, the effect of the supergravity field on the enrichment and separation behavior of Ag in the alloy samples was investigated. Upon co...
Source: Chemical Engineering and Processing: Process Intensification - July 6, 2019 Category: Chemistry Source Type: research

Comparisons of process intensifying methods in the extraction of pectin from pomelo peel
Publication date: Available online 5 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Shan Qin Liew, Wen Hui Teoh, Rozita Yusoff, Gek Cheng NgohAbstractThe extraction of pectin from pomelo peel using conventional heating extractive method with acid (CE), sequential ultrasound-microwave assisted technique (UMAE) and dynamic subcritical water extractive technique (SWE) were compared. The physicochemical properties of pectin extracted using the three different techniques were found to be of good quality. The viscosity of the extracted pectin was found to be ˜0.01 Pa.s while...
Source: Chemical Engineering and Processing: Process Intensification - July 6, 2019 Category: Chemistry Source Type: research

Experimental Study of Methane-Oxygen Premixed Flame Characteristics in Non-Adiabatic Micro-Reactors
Publication date: Available online 2 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Mohammadreza Baigmohammadi, Sadegh Tabejamaat, Maryam YeganehAbstractIn this paper, the effects of Reynolds number, geometrical parameters, and equivalence ratio on methane-oxygen premixed flame dynamics in non-adiabatic micro-reactors were investigated experimentally. The results showed that decreasing the inner diameter of the reactor could significantly influence flame operational regimes and propagation speed in the reactors in terms of suppressing hydrodynamic instabilities and compatibility wi...
Source: Chemical Engineering and Processing: Process Intensification - July 3, 2019 Category: Chemistry Source Type: research

Effect of the Additives on Combustion Characteristics and Desulfurization Performance of Cow Dung Briquette
In this study, the effect of the additives on combustion performance of cow dung briquette was investigated. Cow dung briquette (CDB) was prepared using the cold-press briquetting technology by mixing of coal and cow dung as raw materials, composite of potassium nitrate, manganese dioxide and citric acid as combustion promoter, mixture of calmogastrin and molybdenum as smoking suppressor, sodium humate and red clay as binder and acidified calcium oxide as desulphurizer. The comprehensive combustion characteristic index (SN), the stable burning characteristic index (DW) and the burnout index (Cb) of CDB were calculated by t...
Source: Chemical Engineering and Processing: Process Intensification - July 3, 2019 Category: Chemistry Source Type: research

Recovery of copper from a mixture of printed circuit boards (PCBs) and sulphidic tailings using bioleaching and solvent extraction processes
Publication date: Available online 2 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Seifollah Akbari, Ali AhmadiAbstractThe extraction of copper from a mixture of a Cu-Ni-Co bearing sulphidic tailing and printed circuit boards was investigated by bioleaching process followed by solvent extraction of the pregnant leach solutions. Bioleaching was conducted in both batch and continuous modes in 2- and 50-L stirred tank bioreactors using a mixed culture of iron- and sulphur-oxidizing microorganisms. The results of bioleaching in three 50-L reactors showed that 92% copper, 67% zinc and ...
Source: Chemical Engineering and Processing: Process Intensification - July 3, 2019 Category: Chemistry Source Type: research

Intensification of photodecomposition of organics contaminations by nanostructured ZnO-SnO2 coatings prepared by polymer-salt method
Publication date: Available online 2 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): S.K. Evstropiev, L.V. Lesnykh, A.V. Karavaeva, N.V. Nikonorov, K.V. Oreshkina, L.Yu. Mironov, S.Yu. Maslennikov, E.V. Kolobkova, I.V. BagrovAbstractThe article presents the study of the synthesis and characterization of nanostructured transparent ZnO-SnO2 coatings for the intensification of photodecomposition of organic contaminations. Thin transparent coatings were prepared on the glass surface by a polymer-salt method. Mixed oxide coatings were studied by spectroscopic and luminescent methods, SEM...
Source: Chemical Engineering and Processing: Process Intensification - July 3, 2019 Category: Chemistry Source Type: research

Development of a Novel Continuous Dense Gas Process for the Production of Residual Solvent-Free Self-Assembled Nano-Carriers
Publication date: Available online 2 July 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Chau Chun Beh, Mee Ging Wong, Victor Olet, Neil FosterAbstractA continuous dense gas process has been developed based on the principles of process intensification. The continuous process is designed for the production of self-assembled nano-carriers for pharmaceutical applications such as liposomes, polymersomes, and micelles. Carbon dioxide (CO2) is being used during the dense gas process. The dense gas CO2 process is regarded as a green technology since the process does not generate CO2 as a produ...
Source: Chemical Engineering and Processing: Process Intensification - July 3, 2019 Category: Chemistry Source Type: research

Butyl Acrylate Production: a Review on Process Intensification Strategies
Publication date: Available online 28 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Dânia S.M. Constantino, Rui P.V. Faria, Ana M. Ribeiro, Alírio. E. RodriguesAbstractButyl Acrylate is one of the most important acrylic monomers presenting great potential for several industrial applications mainly in surface coating field. Hence, the global butyl acrylate market has grown in the last years and, accordingly, the development of better alternatives to the conventional process, which involves a multistage procedure and homogeneous catalysis, is increasingly gaining the at...
Source: Chemical Engineering and Processing: Process Intensification - June 30, 2019 Category: Chemistry Source Type: research

Zeolite Membrane Reactor for High-Temperature Isobutane Dehydrogenation Reaction: Experimental and Modeling Studies
In this study, isobutane dehydrogenation (IBDH) in a packed-bed membrane reactors (PBMRs) in combination with a Pt/Al2O3 catalyst was investigated. MFI zeolite membranes were found to have good H2/i-C4H10 selectivity which enhanced isobutane conversion at high operation temperature. The effect of the PBMR operating conditions such as weight hourly space velocity (0.8-2.7 h-1), temperature (550-650 °C), and sweep gas flow rate (0-40 cm3/min) on isobutane conversion, isobutylene selectivity and isobutylene yield was studied. The highest isobutane conversion, isobutylene selectivity and isobutylene yield was...
Source: Chemical Engineering and Processing: Process Intensification - June 28, 2019 Category: Chemistry Source Type: research

Hydrodynamics of the tridimensional rotational flow sieve tray in a countercurrent gas-liquid column
Publication date: Available online 27 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Meng Tang, Shaofeng Zhang, Dewu Wang, Yan Liu, Yishuo Zhang, Hongkai Wang, Kun YangAbstractThe hydrodynamic performance of the TRST in a gas-liquid countercurrent flow column was investigated experimentally in this article. The results show that the operating field can be divided into low and high loading areas according to the increasing rate of the pressure drop. The space utilization of the tray is low, and the flow patterns are mainly droplet-column and continuous film flows. The pressure drops...
Source: Chemical Engineering and Processing: Process Intensification - June 28, 2019 Category: Chemistry Source Type: research

Impact of aeration rate and dielectrophoretic force on fouling suppression in submerged membrane bioreactors
Publication date: Available online 28 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): A.H. Hawari, B. Larbi, A. Alkhatib, Ahmed T. Yasir, F. Du, M. Baune, J. ThömingAbstractMembrane bioreactors (MBRs) present a unique opportunity in waste water treatment by combining the activated sludge process with membrane filtration. Although MBRs require less area, produce less volume of sludge and have high purification efficiency, they suffer from high membrane fouling. Membrane fouling can be reduced by applying aeration and Dep voltage. However, application of these two anti-fouling me...
Source: Chemical Engineering and Processing: Process Intensification - June 28, 2019 Category: Chemistry Source Type: research

Accelerating Reactor Development with Accessible Simulation and Automated Optimization Tools
In this study, DAKOTA (optimization toolkit), DETCHEMTM (surface reaction and thermodynamics toolkit), and OpenFOAM (multiphysics simulation software) are newly integrated to optimize non-linear reactive configurations. Using an automated derivative-free multi-objective optimization method, the hydrogen productivity per volume (kg H2/m3/s) can be substantially increased while concurrently reducing the peak reaction temperature. Specifically, by allowing the coupled simulation framework to change the distribution and amount of catalyst, along with channel diameter, feed flow rate and inlet temperature, hydrogen productivity...
Source: Chemical Engineering and Processing: Process Intensification - June 27, 2019 Category: Chemistry Source Type: research

Ultrasound assisted ultrafiltration of whey using dual frequency ultrasound for intensified recovery of lactose
Publication date: Available online 22 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Rajeshree A. Khaire, Ashin A. Sunny, Parag R. GogateAbstractThe current work focuses on intensifying ultrafiltration applied for recovery of lactose from whey using ultrasound with detailed studies into effect of operating parameters such as power and frequency to maximize the degree of intensification. Ultrasonic probe (22 kHz frequency) at varying supplied powerfrom 50 W to 120 W and dual frequency ultrasonic reactor (22 kHz and 44 kHz operated individually and ...
Source: Chemical Engineering and Processing: Process Intensification - June 24, 2019 Category: Chemistry Source Type: research

Process Intensification by Applying Chemical Looping in Natural Gas to Dimethyl Ether Conversion Process – Implications for Process Design Education
Publication date: Available online 22 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Fanhe Kong, David TomaskoAbstractProcess intensification (PI) is an important concept in the profession of chemical engineering. In this article, we use the chemical looping reforming for dimethylether synthesis (CLR-DME) as an example to explain five aspects of PI and how they can be achieved by utilizing chemical looping to replace the conventional autothermal reforming (ATR-DME) process. Two CLR-DME process configurations, one with single reducer and the other with modular reducers, are modeled ...
Source: Chemical Engineering and Processing: Process Intensification - June 24, 2019 Category: Chemistry Source Type: research

Editorial Board
Publication date: July 2019Source: Chemical Engineering and Processing - Process Intensification, Volume 141Author(s): (Source: Chemical Engineering and Processing: Process Intensification)
Source: Chemical Engineering and Processing: Process Intensification - June 24, 2019 Category: Chemistry Source Type: research

Publisher's note
Publication date: July 2019Source: Chemical Engineering and Processing - Process Intensification, Volume 141Author(s): (Source: Chemical Engineering and Processing: Process Intensification)
Source: Chemical Engineering and Processing: Process Intensification - June 24, 2019 Category: Chemistry Source Type: research

Thermodynamic assessment of membrane-assisted chemical looping reforming of glycerol
Publication date: Available online 21 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Shuai Wang, Bowen Li, Yuxiang Tang, Yurong HeAbstractChemical looping reforming (CLR) as an extension of chemical looping combustion uses less oxygen carriers to achieve hydrogen production via partial oxidation of fuel. Membrane hydrogen separation can promote hydrogen production and makes it possible to low-temperature reforming. In this work, the CLR performance of glycerol with membrane hydrogen separation is investigated by means of thermodynamic analysis. On the basis of the Gibbs free energy...
Source: Chemical Engineering and Processing: Process Intensification - June 22, 2019 Category: Chemistry Source Type: research

Microfluidic Process Intensification for Synthesis and Formulation in the Pharmaceutical Industry
Publication date: Available online 15 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Aliaa I. Shallan, Craig PriestAbstractProcess intensification has had an enormous impact on industrial strategy over the last century, with good outcomes for efficiency, safety, environment, and financial cost. Microfluidics offers a relatively new approach that has been studied for 30 years and has become a realistic tool for process intensification in important areas, including pharmaceutical industry. Drug manufacturing and development are expensive, highly regulated, and of great importance to ...
Source: Chemical Engineering and Processing: Process Intensification - June 16, 2019 Category: Chemistry Source Type: research

Enhancing Active Electro-Kinetic Micro-Mixer Efficiency by Introducing Vertical Electrodes and Modifying Chamber Aspect Ratio
Publication date: Available online 13 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Kamyar Maleki Bagherabadi, Mahdi Sani, Mohammad Said SaidiAbstractMicro-mixers are considered as vital components of Micro Total Analysis systems (µTAS). Major objective in the design of micro-mixers is achieving high mixing quality in short mixing times. In this paper, numerical simulation of some micro-mixer designs has been carried out to understand the detailed flow pattern and thereby to propose modifications for improving mixing efficiency. It is well known that inducing convection will...
Source: Chemical Engineering and Processing: Process Intensification - June 13, 2019 Category: Chemistry Source Type: research

Intensification and Performance Assessment for Synthesis of 2-Methoxy-2-Methyl-Heptane through the Combined Use of Different Pressure Thermally Coupled Reactive Distillation and Heat Integration Technique
Publication date: Available online 11 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Shirui Sun, Ao Yang, I-Lung Chien, Weifeng Shen, Shun’an Wei, Jingzheng Ren, Xiangping ZhangAbstract2-methoxy-2-methyl-heptane (MMH) plays a key role in reformulated gasoline industry due to fewer environmental impacts than methyl tert-butyl ether. Thus, the design of MMH production process has received substantial attention. In this work, we propose a different pressure thermally coupled reactive distillation (DPTCRD) process for the synthesis of MMH aiming at reducing in energy requirements...
Source: Chemical Engineering and Processing: Process Intensification - June 12, 2019 Category: Chemistry Source Type: research

Methane conversion to H2 and higher hydrocarbons using Non-thermal plasma dielectric barrier discharge reactor
Publication date: Available online 10 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Faisal Saleem, Jonathan Kennedy, Usman H Dahiru, Kui Zhang, Adam HarveyAbstractThe use of Non-Thermal Plasma (NTP) reactors has been proposed as an alternative solution to the World’s stranded gas challenge due to their ability to perform reactions, such as direct conversion of methane to H2 and higher hydrocarbons (>C1), at room temperature. An optimisation study varying plasma power (10-50 W) and residence time (3.82 -19.08 s) was performed using a DBD reactor with no catal...
Source: Chemical Engineering and Processing: Process Intensification - June 12, 2019 Category: Chemistry Source Type: research

Stable operating range and solids residence time of fine fluorite particles in the two-stage fluidized bed
Publication date: Available online 11 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Yao Yang, Cheng Chen, Zhongxuan Liu, Keqin Wang, Wangmin Lin, Zhengliang Huang, Jingyuan Sun, Jingdai Wang, Yongrong Yang, Lei Xie, Hongye SuAbstractSolids transmission behavior is essential for the design and optimization of the multi-stage fluidized bed. This work investigated the stable operation range and solids residence time of fine fluorite particles in a cold-model two-stage fluidized bed to reveal the transmission behavior of fine particles, and compared effects of different downcomers on ...
Source: Chemical Engineering and Processing: Process Intensification - June 12, 2019 Category: Chemistry Source Type: research

Influence of Nanoprecipitation on Crystalline Starch Nanoparticle formed by Ultrasonic Assisted Weak-Acid Hydrolysis of Cassava Starch and the Rheology of their Solutions
Publication date: Available online 7 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Augustine Agi, Radzuan Junin, Afeez Gbadamosi, Azza Abbas, Nur Bashirah Azli, Jeffrey OsehAbstractIn this research, plant and fruits extracts were used for the first time to synthesize crystalline starch nanoparticles (CSNP). The physical properties of the CSNP including their size distribution, crystalline structures were investigated. The isolation, recovery yield and the influence of the process variables were studied. The rheological behaviours of the CSNP were compared and contrasted with the n...
Source: Chemical Engineering and Processing: Process Intensification - June 9, 2019 Category: Chemistry Source Type: research

Upconversion Luminescence Mediated Photodynamic Therapy through Hydrophilically Engineered Porphyrin
Publication date: Available online 5 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Xiaodan Sun, Peisen Zhang, Yi Hou, Yingying Li, Xiaodan Huang, Zihua Wang, Lihong Jing, Mingyuan GaoAbstractPhotodynamic therapy that involves the photosensitizer transferring the absorbed energy to surrounding tissue oxygen has been used in clinical treatment of cancer. However, the clinically used porphyrin derivatives as PDT photosensitizers usually need high energy excitation light, which generally gives rise to limited tissue penetration depth and thereby limited photoactivation efficiency. Her...
Source: Chemical Engineering and Processing: Process Intensification - June 6, 2019 Category: Chemistry Source Type: research

Experimental study on the dehydration performance of synergistic effect of electric field and magnetic field
Publication date: Available online 6 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Kai Guo, Yuling Lv, Limin He, Xiaoming Luo, Donghai YangAbstractElectromagnetic synergistic oil-water separation is a promising technology for deep dehydration with higher efficiency, shorter dehydration period and flexible control of field parameters. In this paper, non-conductive silicone oil without colloid and asphaltene was used as the continuous phase. The effect of magnetization and Lorentz force on the continuous phase can be excluded to explore the mechanism of the electric field and magnet...
Source: Chemical Engineering and Processing: Process Intensification - June 6, 2019 Category: Chemistry Source Type: research

canola oil/glycerol mixtures in a continously operated FCC pilot plant And comparison with vacuum gas oil/glycerol Mixtures
Publication date: Available online 4 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Marco Büchele, Matthias Swoboda, Alexander Reichhold, Wolfgang HoferAbstractCatalytic cracking of glycerol/canola oil mixtures was conducted in a continuously operated FCC pilot plant at TU Wien. The range of mixtures was from pure canola oil to pure glycerol with several mixtures in between. The aim of this research was to prove if the addition of glycerol to the feed can be feasible and to determine changes in product quality. The set riser temperature was 550 °C and the selected f...
Source: Chemical Engineering and Processing: Process Intensification - June 5, 2019 Category: Chemistry Source Type: research

Ultra-fast route to synthesizing biogenic carbonate hydroxyapatite: Consequence of a high-pressure solid-solid preparation technique
Publication date: Available online 4 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Abdul-Rauf Ibrahim, Rugabirwa Benoit, Xian Suo, Xiangyun Li, Yan Hung, Guifeng Ma, Jun LiAbstractWe employed a high-pressure solid–solid preparation technique in CO2 to synthesize carbonate hydroxyapatite (CHAp) powders from solid calcium and phosphate precursors. The synthesis parameters were investigated and optimized to determine the best precursor and optimal synthesis conditions. The results showed that the technique is green and that the biogenic calcium from eggshells in supercritical C...
Source: Chemical Engineering and Processing: Process Intensification - June 5, 2019 Category: Chemistry Source Type: research

Closed-loop Identification and Model Predictive Control of Extractive Dividing-Wall Column
Publication date: Available online 4 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Zemin Feng, Weifeng Shen, G.P. Rangaiah, Lichun DongAbstractExtractive dividing-wall column (EDWC) is a promising thermally-coupled system for separating multiple azeotrope or close-boiling mixtures; however, its intensified structure with relatively small physical space and strong interactions makes model predictive control (MPC) an attractive scheme for EDWC operation. The performance of MPC strongly depends on the accuracy of the dynamic model. The presence of recycled entrainer stream in EDWC ma...
Source: Chemical Engineering and Processing: Process Intensification - June 5, 2019 Category: Chemistry Source Type: research

Fine particle removal from gas stream using a helical-duct dust concentrator: Numerical study
In this study, separation efficiency and pressure drop of a helical-duct dust concentrator have been investigated numerically and experimentally. The mixture multiphase approach has been applied for CFD1 simulations of the process. The effects of various geometrical (helical-duct diameter and number of helix rounds) and operational parameters (inlet air mass flow rate, solid mass fraction and flow split ratio) on the solid-gas separation efficiency and pressure drop have been investigated by CFD simulations. It was found that by increasing the flow split ratio - as the main effective parameter on concentrator separation pe...
Source: Chemical Engineering and Processing: Process Intensification - June 5, 2019 Category: Chemistry Source Type: research

One step extraction of essential oils and pectin from pomelo (Citrus grandis) peels
Publication date: Available online 1 June 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Nguyen Trong Tuan, Le Ngoc Dang, Bui Thi Cam Huong, Luu Thai DanhAbstractPectin and essential oils (EOs) were simultanuously extracted from pomelo peels by adding citric acid into water used for hydrodistillation of pomelo peels. The effect of citric acid concentrations (0-0.55%) on the chemical composition and yield of EOs and pectin yield were investigated. EO yields and the chemical compostion were not significantly affected by citric acid. EO yields were about 1% fresh weight or 4.6% dry weight ...
Source: Chemical Engineering and Processing: Process Intensification - June 2, 2019 Category: Chemistry Source Type: research

Continuous aqueous two-phase extraction of microalgal C-phycocyanin using a Coiled Flow Inverter
In this study, the intensification of C-phycocyanin protein extraction from the green microalgae Spirulina maxima was successfully achieved using aqueous two-phase systems coupled to different continuous-operation extractors. Three systems with different total concentrations of Polyethylene glycol and potassium phosphate salt were tested in three different types of continuous systems: a conventional straight-tube extractor, a helical-coiled extractor, and a coiled flow inverter extractor. Results showed that the coiled flow inverter extractor achieves higher overall performance than the other continuous extractors at the s...
Source: Chemical Engineering and Processing: Process Intensification - June 2, 2019 Category: Chemistry Source Type: research

Electrochemical degradation of 17-α-Methyltestosterone over DSA® electrodes
Publication date: Available online 30 May 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): José L.S. Duarte, Lucas Meili, Lúcio M. Gomes, Jéssica M.O. Melo, Alice B. Ferro, Marcela G. Tavares, Josealdo Tonholo, Carmen L.P.S. ZantaAbstractElectrochemical degradation of 17-α-methyltestosterone (MT) using a commercial Dimensionally Stable Anode (DSA®) was studied in order to determine the best electrolysis conditions of electrolyte type (Na2SO4, NaClO4), pH (3,0 and 7,0) and current density (15, 30 and 45 mAcm-2). The depletion of MT absorbance, chemical oxygen...
Source: Chemical Engineering and Processing: Process Intensification - May 31, 2019 Category: Chemistry Source Type: research

Kinetics and Mechanism of Low-Frequency Ultrasound Driven Elimination of Trace Level Aqueous Perfluorooctanesulfonic acid and Perfluorooctanoic acid
Publication date: Available online 29 May 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Panda Debabrata, Sethu Vasanthi, Manickam SivakumarAbstractPerfluorooctanesulfonic acid (PFOS) and Perfluorooctanoic acid (PFOA) are the most investigated persistent organic pollutants due to their adverse health concerns and inertness in elimination. The wastewater treatment of PFOX (PFOS and PFOA) has been investigated by sonochemical method while implementing a 20-kHz probe-type sonicator with ultrasound power variance from 150 to 375 W. Highest degradation rate was achieved under optimum ...
Source: Chemical Engineering and Processing: Process Intensification - May 30, 2019 Category: Chemistry Source Type: research

Study of a foam flotation process assisted by cationic surfactant for the separation of soil clay particles: processing parameters and scaling-up sensitivity
Publication date: Available online 29 May 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Anouar Ben Said, Fabien Frances, Agnès Grandjean, Christelle Latrille, Sylvain FaureAbstractContinuous froth flotation process assisted by cationic surfactant was employed in this study, as cost-effective and environmentally friendly technology, to separate fine phyllosilicates particles of soil. A continuous flotation column was specifically designed for soil flotation. The effects of processing parameters, including collector concentration expressed as collector/soil ratio (0.1-0.4%), froth...
Source: Chemical Engineering and Processing: Process Intensification - May 30, 2019 Category: Chemistry Source Type: research

The Role of Process Intensification in Addressing the Dual Energy Challenge
Publication date: Available online 27 May 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Carla S. Pereira, Bryan A. PatelAbstractWorldwide, human population and living standards are rising in tandem; by 2040, the world’s population is projected to reach about 9.2 billion people compared to about 7.4 billion in 2016. Over that period, global GDP is expected to approximately double, helping billions of people join the middle class. Coincident with this growing economic activity and prosperity, global energy demand will likely rise about 25 percent even as energy efficiency gains con...
Source: Chemical Engineering and Processing: Process Intensification - May 28, 2019 Category: Chemistry Source Type: research

Heat transfer intensification in pin-fin heat sink by changing pin-length/longitudinal-pitch
Publication date: Available online 27 May 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): M. Rezaee, M. Khoshvaght-Aliabadi, A.A. Abbasian Arani, S.H. MazloumiAbstractThe current investigation analyzes experimentally and numerically the hydrothermal performance of a water-cooled pin-fin heat sink by changing pin-length and longitudinal-pitch. The new designs of heat sinks are named as variable pin-length with low to high arrangement (PL-LH), variable pin-length with high to low arrangement (PL-HL), variable longitudinal-pitch with low to high arrangement (LP-LH), and variable longitudina...
Source: Chemical Engineering and Processing: Process Intensification - May 28, 2019 Category: Chemistry Source Type: research

Analysis of heat integration, intermediate reboiler and vapor recompression for the extractive distillation of ternary mixture with two binary azeotropes
Publication date: Available online 27 May 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Jinglian Gu, Xinqiang You, Changyuan Tao, Jun LiAbstractFew works focus on the process intensification of extractive distillation (ED) for the separation of ternary mixture with two binary azeotropes due to its complexity. In this work, double-effect heat integration (DEHI), intermediate reboiler (IR) and vapor recompression (VRC) heat pump ED intensification processes for separating tetrahydrofuran-methanol-water mixture are proposed and optimized via multi-objective genetic algorithm to reduce the...
Source: Chemical Engineering and Processing: Process Intensification - May 28, 2019 Category: Chemistry Source Type: research

Micromixing efficiency optimization of the premixer of a rotating packed bed by CFD
Publication date: Available online 26 May 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Yi Ouyang, Yang Xiang, Xue-Ying Gao, Hai-Kui Zou, Guang-Wen Chu, Ramesh K. Agarwal, Jian-Feng ChenAbstractRotating packed bed (RPB) as an HiGee process intensification reactor can provide high micromixing efficiency, which is essential for fast reactions in fine chemicals, pharmaceutical and crystallization fields. In this paper, a Computational Fluid Dynamics (CFD) model is developed to investigate the micromixing efficiency in the premixer and packing zone of an RPB based on Villermaux-Dushman rea...
Source: Chemical Engineering and Processing: Process Intensification - May 27, 2019 Category: Chemistry Source Type: research

Experimental and computational investigation of heat transfer in a microwave-assisted flow system
Publication date: Available online 23 May 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Spyridon Damilos, Anand N.P. Radhakrishnan, Georgios Dimitrakis, Junwang Tang, Asterios GavriilidisAbstractMicrowave technology is gaining popularity as a tool for chemical process intensification and an alternative to conventional heating. However, in flow systems non-uniform temperature profiles are commonly encountered and hence methods to characterise and improve them are required. In this work, we studied the effects of various operational parameters - microwave power, inlet flow rate, tube ori...
Source: Chemical Engineering and Processing: Process Intensification - May 25, 2019 Category: Chemistry Source Type: research