Mass Transfer Phenomenon in Photocatalytic Cascade Disc Reactor: Effects of Artificial Roughness and Flow Rate
In this study, a novel photocatalytic cascade disc reactor coated with ZnO nanoparticles was first applied to investigate the effect of two influential parameters, i.e. artificial roughness and flow rate on photocatalysis degradation of Reactive Yellow 81 (RY81). Mass transfer coefficients were then determined to describe the effect of those parameters on photocatalytic process based on benzoic acid dissolution method. Fluid flow and concentration fields were simulated to explore the characteristics of mass transfer process with OpenFOAM software. Based on the experimental and simulation results, it was found that as artif...
Source: Chemical Engineering and Processing: Process Intensification - March 12, 2017 Category: Chemistry Source Type: research

Microwave processing of high entropy alloys: a powder metallurgy approach
Publication date: Available online 9 March 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): P. Veronesi, E. Colombini, R Rosa, C. Leonelli, M. Garuti Microwaves at the ISM frequency of 2450 and 5800MHz have been exploited to prepare FeCoNiCrAl-family high entropy alloys by direct heating of pressed mixtures of metal powders. The aim of this work is to explore a new microwave assisted near-net-shape technology, using powder metallurgy approach for the preparation of high entropy alloys, able to overcome the limits of current melting technologies (defects formation) or solid state ones (ti...
Source: Chemical Engineering and Processing: Process Intensification - March 10, 2017 Category: Chemistry Source Type: research

Spinning Fluids Reactor: a new design of a gas – liquid contactor
Publication date: Available online 9 March 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Robert Aranowski, Przemysław Wojewódka, Anna Zielińska-Jurek, Romuald Bokotko, Christian Jungnickel Current trends in chemical reactor design are based on adapting these to the requirements of a particular chemical process. Processes involving reactions between the gas and liquid phase in particular require precise adjustment of all parameters. The common denominator for most modern design solutions is enhancement of the mass transfer area and the overall volumetric mass transfer coeffici...
Source: Chemical Engineering and Processing: Process Intensification - March 10, 2017 Category: Chemistry Source Type: research

Dielectric properties measurement methods for solids of high permittivities under microwave frequencies and between 20 and 250 °C
This study highlights the advantages and drawbacks of each technique and demonstrates that the real part ε’r and the imaginary part ε”r of the permittivity can be advantageously and separately determined by using different shapes and volumes of samples. In addition to dielectric properties, valuable informations about the surface state of the material can also be obtained. Finally, it is shown that combining the different methods can be a benefic and a clever way to obtain very accurate results in a wide range of temperature or frequencies. Graphical abstract (Source: Chemical Engineering and Pr...
Source: Chemical Engineering and Processing: Process Intensification - March 9, 2017 Category: Chemistry Source Type: research

Simulation of the Absorption of SO2 by Ammonia in a Spray Scrubber
Publication date: Available online 7 March 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Yong Jia, Liguo Yin, Yalin Xu, Yihua Chen, Xilou Ding On basis of investigation of the mass transfer coefficient and gas-liquid interfacial area, a mathematical model was developed to simulate the absorption of SO2 by ammonia in a spray scrubber. This model could provide predictions of the desulfurization efficiency at different operating conditions such as pH of solution, velocity of flue gas, liquid-to-gas ratio, SO2 concentration and the height of absorption zone. The calculated desulfurization...
Source: Chemical Engineering and Processing: Process Intensification - March 9, 2017 Category: Chemistry Source Type: research

Heat transfer enhancement of heat exchanger tube with multiple square perforated twisted tape inserts: Experimental investigation and correlation development
Publication date: Available online 6 March 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Amar Raj Singh Suri, Anil Kumar, Rajesh Maithani The present study examines the augmentation in heat transfer and friction in a flow through heat exchanger tube with multiple square perforated twisted tape inserts. The experimental outcomes pertaining to Reynolds number ( R e n ) from 5000 to 27000, perforation width ratio ( a / W T ) from 0.083-0.333 and twist ratio ( T L / W T ) from 2.0-3.5 have been presented and discussed. Multiple square perforated twist tape brought out considerable enhance...
Source: Chemical Engineering and Processing: Process Intensification - March 7, 2017 Category: Chemistry Source Type: research

Effects of microwave sintering in aging resistance of zirconia-based ceramics
Publication date: Available online 4 March 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Álvaro Presenda, María Dolores Salvador, Felipe L. Penaranda-Foix, José M. Catalá-Civera, Eliria Pallone, Julieta Ferreira, Amparo Borrell Innovative techniques for materials processing that result in shorter times and lower energy consumption than conventional methods, such as microwave sintering, are currently under investigation in order to obtain fully-consolidated ceramic materials. Microwave sintering has important effects on the resulting properties of zirconia-b...
Source: Chemical Engineering and Processing: Process Intensification - March 5, 2017 Category: Chemistry Source Type: research

Separation of para-xylene and meta-xylene by extraction process using aqueous cyclodextrins solution
Publication date: Available online 2 March 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Haofan Yang, Yufeng Hu The separation of para-xylene (p-xylene) from its mixtures with meta-xylene (m-xylene) using aqueous hydroxypropyl-β-cyclodextrin (HP-β-CD) solution by a two-step liquid−liquid extraction process has been experimentally investigated. The results show that HP-β-CD can form inclusion complexes of different strengthes with p-xylene and m-xylene. It is shown that the different strengthes stem from the differences in size, relative alkalinity and dipole momen...
Source: Chemical Engineering and Processing: Process Intensification - March 3, 2017 Category: Chemistry Source Type: research

Central composite design optimization of Rhodamine B Degradation using TiO2 nanoparticles/UV/PVDF process in continuous submerged membrane photoreactor
Publication date: Available online 2 March 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Vahid Vatanpour, Asma Karami, Mohsen Sheydaei In this paper, efficiency of a hybrid system combining UV/TiO2 nanoparticles and polyvinylidene fluoride (PVDF) membrane in a continuous pilot-scale submerged membrane photocatalysis reactor (SMPR) was investigated to degradation of Rhodamine B (RhB). The PVDF microfiltration membrane has potential to separate TiO2 nanoparticles from the treated wastewater. Effects of different operational parameters such as TiO2 dosages, UV light intensity, solution p...
Source: Chemical Engineering and Processing: Process Intensification - March 3, 2017 Category: Chemistry Source Type: research

Low pressure hydrodynamic cavitating device for producing highly stable oil in water emulsion: Effect of geometry and cavitation number
Publication date: Available online 1 March 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Jitendra Carpenter, Suja George, Virendra Kumar Saharan In present work, the detailed geometrical analysis of hydrodynamic cavitating devices was carried out to investigate the effect of geometry (orifice and venturi of different shapes) and geometrical parameters on the formation and stability of mustard oil in water nanoemulsion. The optimization of geometrical parameters was carried out based on the lowest droplet size obtained and droplet size reduced per unit pass. It was observed that the si...
Source: Chemical Engineering and Processing: Process Intensification - March 2, 2017 Category: Chemistry Source Type: research

Formation of oil/water emulsions inside the pressure-swirl atomizer
Publication date: Available online 1 March 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Marek Ochowiak, Sylwia Włodarczak, Magdalena Matuszak, Teofil Jesionowski A study was performed using multi-phase flows of water and mineral oil in a pressure-swirl atomizer with a multi-hole oil injector to produce O/W emulsions. The volumetric fraction of the oil dispersed phase in the emulsions ranged from 0.1 to 0.3, and the volumetric flow rates of the emulsions were between 1.38·10−5 and 5.55·10−5 m3/s. The structures of the resulting emulsions were determined. It ...
Source: Chemical Engineering and Processing: Process Intensification - March 1, 2017 Category: Chemistry Source Type: research

A hydrodynamic study of cylindrical metal foam packings: residence time distribution and two phase pressure drop
Publication date: Available online 27 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Farzad Lali The present study deals with hydrodynamic characterization of a cylindrical metal foam packings in terms of wetting efficiency, residence time distribution and pressure drop. It was shown that the operation of foam packings in liquid downward flow does not lead to an optimal wetting efficiency according to very high void volume and is very sensitive to the wall issues i.e. fabrication tolerances in the range of 100μm, Therefore, the study was performed for an upward flow operati...
Source: Chemical Engineering and Processing: Process Intensification - February 28, 2017 Category: Chemistry Source Type: research

SiO2 Monomer-Triggered Self-Assembly of Hybrid CdTe Quantum Dots
Publication date: Available online 24 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Yue Zhao, Simin Lu, Katarzyna Matras-Postolek, Ping Yang The self-assembly activity of quantum dots (QDs) including thioglycolic acid (TGA)-capped CdTe and hybrid SiO2-coated CdTe QDs into one- to three-dimensional (3D) nanostructures was reported using a slow growth process. SiO2 monomers from a sol-gel process and TGA play vital roles for the self-assembly. The hybrid SiO2-coated QDs were assembled into 1D nanotube, 2D nanosheets, and 3D nanoflowers by adjusting QD concentrations. It is foun...
Source: Chemical Engineering and Processing: Process Intensification - February 25, 2017 Category: Chemistry Source Type: research

Localized microwave-heating intensification —1-D model and potential applications
Publication date: Available online 24 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Eli Jerby This paper reviews the localized microwave-heating (LMH) phenomenon and its various applications in a paradigmatic approach. A simplified 1-D microwave-heating model is derived for a temperature-dependent dielectric medium in a cavity. This semi-analytical model shows the evolution of high-order spatial modes, and the concentration therein of the dissipated power. The LMH effect is associated with the localized hotspot formation due to the thermal-runaway instability. LMH intensifica...
Source: Chemical Engineering and Processing: Process Intensification - February 25, 2017 Category: Chemistry Source Type: research

Ultrasonic extraction of natural dye from Rubia Cordifolia, optimisation using response surface methodology (RSM) & amp; comparison with artificial neural network (ANN) model and its dyeing properties on different substrates
Publication date: April 2017 Source:Chemical Engineering and Processing: Process Intensification, Volume 114 Author(s): N. Vedaraman, K.V. Sandhya, N.R.B. Charukesh, B. Venkatakrishnan, K. Haribabu, M.R. Sridharan, R. Nagarajan Extraction of natural dye from the roots of Rubia Cordifolia by conventional extraction, as well as by using ultrasonic extraction, has been performed in this study. Process variables, namely ultrasonic frequency (25, 40, 58kHz), solid-to-liquid ratio (1:5, 1:10, 1:15) and extraction time (2, 2.5, 3h) were studied, and the optimum condition was determined using three-factor Central Composite Design...
Source: Chemical Engineering and Processing: Process Intensification - February 23, 2017 Category: Chemistry Source Type: research

Synthesis of dicarba-cyclooctapeptide Somatostatin analogs by conventional and MW-assisted RCM: a study about the impact of the configuration at C α of selected amino acids
Publication date: Available online 22 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Alessandro Pratesi, Samuele Stazzoni, Marco Lumini, Giuseppina Sabatino, Alfonso Carotenuto, Diego Brancaccio, Ettore Novellino, Marco Chinol, Paolo Rovero, Mauro Ginanneschi, Anna Maria Papini This work describes the synthesis of thirteen cyclooctapeptides dicarba-analogues of Somatostatin, containing l- or d-allylglycine (Agl) residues at the termini of the peptide chain, through on resin Ring Closing Metathesis (RCM) of the linear octapeptides. We investigated the influence of the stereoche...
Source: Chemical Engineering and Processing: Process Intensification - February 22, 2017 Category: Chemistry Source Type: research

Experimental investigation and process intensification of barium sulfate nanoparticles synthesis via a new double coaxial spinning disks reactor
Publication date: Available online 22 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Hamed Bagheri Farahani, Mohammad Shahrokhi, Asghar Molaei Dehkordi In this article, a new double spinning disks reactor (DSDR) has been proposed and tested successfully for the synthesis of barium sulfate nanoparticles by means of the reactive precipitation. The proposed DSDR consists of two coaxial rotating disks placed horizontally in a cylindrical chamber. Continuous precipitation of barium sulfate nanoparticles as a chemical test system was carried out using this new contacting device and ...
Source: Chemical Engineering and Processing: Process Intensification - February 22, 2017 Category: Chemistry Source Type: research

Microwave assisted extraction of polyphenols using a coaxial antenna and a cooling system
Publication date: Available online 20 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Ioan Calinescu, Vasile Lavric, Ioana Asofiei, Adina Ionuta Gavrila, Adrian Trifan, Daniel Ighigeanu, Diana Martin, Constantin Matei Microwave assisted extraction is a powerful tool for natural compounds extraction from plants. The main goal of our research is to obtain a maximum extraction yield without affecting the chemical structure of the valuable natural compounds. In order to avoid the degradation of the latter, a special equipment has been developed. This equipment allows microwave heat...
Source: Chemical Engineering and Processing: Process Intensification - February 21, 2017 Category: Chemistry Source Type: research

Biodegradable choline-like deep eutectic solvents for extractive desulfurization of fuel
Publication date: Available online 21 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Wei Jiang, Lei Dong, Wei Liu, Tao Guo, Hongping Li, Sheng Yin, Wenshuai Zhu, Huaming Li Deep eutectic solvents (DESs) have been deemed as green solvents due to their similar physical properties to ionic liquids. The most advantage of DESs, especially choline chloride-based DESs, is that they are biodegradable and non-toxic. In this work, several choline-like DESs are synthetized and characterized by 1H NMR, FTIR, UV-vis, Raman and ESI-MS. The DESs with different straight alkyl chains linked to...
Source: Chemical Engineering and Processing: Process Intensification - February 21, 2017 Category: Chemistry Source Type: research

Intensification of degradation of Sunset Yellow using packed bed in a pulsed high-voltage hybrid gas-liquid discharge system: Optimization of operating parameters, degradation mechanism and pathways
Publication date: Available online 21 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Zhiyong Zhou, Zhongrui Liang, Ying Liu, Yuepeng Ma, Xinyan Zhu, Xiaying Zhang, Qunsheng Li, Zhongqi Ren The degradation of Sunset Yellow simulated wastewater with a pulsed high-voltage hybrid gas-liquid discharge (PHVHGLD) method was investigated. Packed bed was introduced between two electrodes. Both conducting particles (copper beads and stainless steel beads) and non-conducting particles (activated carbon beads, activated alumina beads, silica gel beads, 3A molecular sieve beads, glass bead...
Source: Chemical Engineering and Processing: Process Intensification - February 21, 2017 Category: Chemistry Source Type: research

Ultrasound assisted liquid –liquid extraction with a novel interval-contact reactor
Publication date: March 2017 Source:Chemical Engineering and Processing: Process Intensification, Volume 113 Author(s): Jinu Joseph John, Simon Kuhn, Leen Braeken, Tom Van Gerven A novel reactor was developed for ultrasound-assisted liquid–liquid extraction. This reactor design entails introducing short contact intervals for the microchannel tubing along the reactor plate channel to have a more focused transmission of the ultrasound. The non-contacted parts of the tubing are still under the influence of the ultrasound as a result of the pseudo-sonicated zone created by the adjacent intervals. The effect of introduct...
Source: Chemical Engineering and Processing: Process Intensification - February 21, 2017 Category: Chemistry Source Type: research

Microfluidic chip reactor and the stereoselective hydrogenation of methylacetoacetate over (R)-Ru-BINAP in the [N8222][Tf2N]/methanol/water mixed phase
Publication date: Available online 16 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Petr Kluson, Petr Stavarek, Vera Penkavova, Hana Vychodilova, Stanislav Hejda, Magdalena Bendova Homogeneous asymmetric catalysts represented by organometallics of transition elements reveal very high activity and stereoselectivity in asymmetric hydrogenation of β-ketoesters. Recently, it appeared efficient to use ionic liquids of the [NR222][Tf2N] type for accommodation of the chiral catalytic complex. Even on the industrial scale it is becoming attractive to carry out hydrogenations wit...
Source: Chemical Engineering and Processing: Process Intensification - February 16, 2017 Category: Chemistry Source Type: research

Scale-up of one-step synthesis of acacetin and apigenin using 915MHz microwaves
Publication date: Available online 13 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Marilena Radoiu, Dominique Chantreux, Bruno Marchiori In this work liquid phase one-step synthesis of acacetin from ethyl 3-(4-methoxyphenyl)-3-oxopropionate and phloroglucinol using PEG 1000 as solvent was examined. Heating of the reaction mixture was done with 915MHz and 2.45GHz microwaves at atmospheric pressure. The demethylation of the obtained acacetin using HBr at reflux led to the formation of apigenin. In view of a possible scale-up, the reaction conditions under 915MHz microwaves wer...
Source: Chemical Engineering and Processing: Process Intensification - February 13, 2017 Category: Chemistry Source Type: research

Heat transfer of swirling impinging jets with TiO2-water nanofluids
Publication date: Available online 3 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): K. Wongcharee, V. Chuwattanakul, S. Eiamsa-ard An experimental work has been carried out to study the heat transfer of swirling impinging jets (SIJs) with TiO2-water nanofluids using thermochromic liquid crystal technique. Experiments were carried out at constant jet-to-target spacing ratio (L/D) of 1.0 for Reynolds numbers from 5000 to 20,000 by using nanofluids with TiO2 concentrations of 0.5%, 1.0%, 1.5%, 2.0% and 2.5% by volume, twisted tapes with twist ratios (y/W) of 4.0, 5.0, 6.0 and 7.0...
Source: Chemical Engineering and Processing: Process Intensification - February 4, 2017 Category: Chemistry Source Type: research

Dividing-Wall Columns: Design and Control of a Kaibel and a Satellite Distillation Column for BTX separation
Publication date: Available online 3 February 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Salvador Tututi-Avila, Luis A. Domínguez-Díaz, Nancy Medina-Herrera, Arturo Jiménez-Gutiérrez, Juergen Hahn Dividing wall distillation technologies have been amongst the most important contributions to process intensification efforts over the last few decades. This work focuses on design, dynamics and control of an extended dividing wall distillation column, referred to as a satellite column, and its comparison to the performance of a Kaibel column and to a direct di...
Source: Chemical Engineering and Processing: Process Intensification - February 4, 2017 Category: Chemistry Source Type: research

Ag3PO4/AgBr/Ag-HKUST-1-MOF composites as novel blue LED light active photocatalyst for enhanced degradation of ternary mixture of dyes in a rotating packed bed reactor
This study focused on a continuous flow photocatalytic rotating packed bed for simultaneous photodegradation of methylene blue (MB), auramine-O (AO) and erythrosine (ER). Blue light emitting diode strips were used as light sources in this reactor for photocatalyst activation. Ag3PO4/AgBr/Ag decorated HKUST-1 MOF composite (HKUST-1-Ag3PO4/AgBr/Ag) as novel visible light photocatalyst was synthesized and characterized by XRD, FE-SEM, EDS and DRS analyses. Eight effective parameters include initial concentrations of MB, AO and ER, rotational speed, solution flow rate, aeration flow rate, HKUST-1-Ag3PO4/AgBr/Ag mass and time o...
Source: Chemical Engineering and Processing: Process Intensification - February 4, 2017 Category: Chemistry Source Type: research

Model Experimental Study on Cs Removal from Clay Minerals by Ion Exchange under Microwave Irradiation
This article reports fundamental studies performed, using vermiculite as a model of clay minerals, doped with non radioactive Cs and heated under irradiation of microwave with addition of various salts in powder state. Among various kinds of chemicals added for exchange reaction, CaCl2 and KCl are shown to be effective for Cs removal, and further mixing of CaCO3 has additional effects. Heating to temperature above 670°C is shown to be effective for their removal, however, the heated features of the specimens differed between the microwave and the electric furnace heating. Microwave absorbability or heating characterist...
Source: Chemical Engineering and Processing: Process Intensification - January 28, 2017 Category: Chemistry Source Type: research

extraction of natural dye from Rubia Cordifolia, optimisation using response surface methodology (RSM) & amp; comparison with artificial neural network (ANN) model and its dyeing properties on different substrates
Publication date: Available online 25 January 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): N. Vedaraman, K.V. Sandhya, N.R.B. Charukesh, K. Haribabu, M.R. Sridharan, R. Nagarajan Extraction of natural dye from the roots of Rubia Cordifolia by conventional extraction, as well as by using ultrasonic extraction, has been performed in this study. Process variables, namely ultrasonic frequency (25, 40, 58kHz), solid-to-liquid ratio (1:5, 1:10, 1:15) and extraction time (2,2.5,3hours) were studied, and the optimum condition was determined using three-factor Central Composite Design (CCD). ...
Source: Chemical Engineering and Processing: Process Intensification - January 26, 2017 Category: Chemistry Source Type: research

The Dissipation rate of Turbulent Kinetic Energy and its Relation to Pumping Power in Inline Rotor-stator Mixers
This study uses energy conservation to reformulate the previously suggested dissipation rate correlations in terms of pumping power which allows for empirical testing. The dimensionless pumping power of three investigated geometrically dissimilar inline RSMs were found to be qualitatively similar to that of centrifugal pumps and decrease linearly with the inline RSM flow number. The previously suggested models for turbulent dissipation in inline RSMs are inconsistent with this observation. Using this reformulation approach, the previously suggested correlation for power-draw is extended to a correlation for dissipation. A ...
Source: Chemical Engineering and Processing: Process Intensification - January 24, 2017 Category: Chemistry Source Type: research

Energy efficiency of a new distillation process for isopropanol, butanol, and ethanol (IBE) dehydration
Publication date: Available online 21 January 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Grisales Díaz Víctor Hugo, Gerard Olivar Tost Isopropanol, butanol, and ethanol (IBE) is an alternative biofuel. However, dehydration of IBE is complicated by the presence of three binary azeotropes. The new distillation system proposed in this work for IBE dehydration was a combination of azeotropic and extractive distillation. Butanol in a complex reflux system, without an additional entrainer, broke the azeotropic behavior of isopropanol-water and ethanol-water. Decantation dis...
Source: Chemical Engineering and Processing: Process Intensification - January 22, 2017 Category: Chemistry Source Type: research

Shock-induced cavitation as a way of accelerating phenol oxidation in aqueous media
Publication date: Available online 19 January 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Hugo Dutilleul, Anthony Partaloglu, Patrick Da Costa, Maria Elena Galvez Shock-induced cavitation phenomena, resulting from the propagation of the trail of shock-waves generated upon the impact of a solid piston on a liquid surface, was used as an innovative way of intensifying the oxidation of phenol in aqueous media. The amount of energy communicated by the impact was found to be proportional to the impact height, and was directly related to the maximal pressure attained, i.e. in the order of...
Source: Chemical Engineering and Processing: Process Intensification - January 20, 2017 Category: Chemistry Source Type: research

Combined trapezoid spray tray (CTST) —A novel tray with high separation efficiency and operation flexibility
Publication date: Available online 17 January 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Honghai Wang, Xiaowei Niu, Chunli Li, Baichun Li, Wenkui Yu The combined trapezoid spray tray (CTST) is a novel spray tray with unique trapezoid spatial structure. With gas-liquid co-current contact, the CTST has a lot of advantages, such as high capacity, efficiency and operation flexibility, low pressure drop, excellent anti-blockage performance, and foaming resistance. In the present work, the hydrodynamic and mass transfer performance of the CTST were investigated in a plexiglass column wit...
Source: Chemical Engineering and Processing: Process Intensification - January 18, 2017 Category: Chemistry Source Type: research

Energy Efficient Crystallization of Paracetamol using Pulsed Ultrasound
Publication date: Available online 12 January 2017 Source:Chemical Engineering and Processing: Process Intensification Author(s): Bjorn Gielen, Piet Kusters, Jeroen Jordens, Leen C.J. Thomassen, Tom Van Gerven, Leen Braeken This work studies the use of pulsed ultrasound during cooling crystallization of paracetamol. The effect of the pulse time on the nucleation temperature, crystal size and shape was evaluated and compared to silent conditions and continuous sonication. Most work is performed in a batch crystallizer, though some preliminary data in a recirculation configuration is also provided. In both setups, the nucle...
Source: Chemical Engineering and Processing: Process Intensification - January 13, 2017 Category: Chemistry Source Type: research

Hydrodynamic Feasibility of the Production of Biodiesel Fuel in a High-Pressure Reactive Distillation Column
Publication date: Available online 31 December 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): Mayra Margarita May-Vázquez, Mario Alberto Rodríguez-Ángeles, Fernando Israel Gómez-Castro, Agustín Ramón Uribe-Ramírez Among the different processes for producing biodiesel fuel, the use of methanol under conditions near to the critical point is a promissory alternative. The reactive distillation has been proposed to reduce the energy requirements of the esterification step in this process. Such reductions are accompanied by reductions in the t...
Source: Chemical Engineering and Processing: Process Intensification - January 1, 2017 Category: Chemistry Source Type: research

Modules in process industry − A life cycle definition
Publication date: January 2017 Source:Chemical Engineering and Processing: Process Intensification, Volume 111 Author(s): Lukas Hohmann, Katrin Kössl, Norbert Kockmann, Gerhard Schembecker, Christian Bramsiepe The chemical and biochemical industry has to face the challenges of globalization, short product cycle times and volatile markets. Therefore, the lead time of development projects has to be shortened. Modules and module-based plant design are widely discussed to enable shorter time-to-market by reuse of engineering effort and standardization. In this paper general requirements on modules in process engineering ...
Source: Chemical Engineering and Processing: Process Intensification - December 29, 2016 Category: Chemistry Source Type: research

Intensification of mass transfer in a pulsed bubble column
Publication date: Available online 15 December 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): P. Budzyński, A. Gwiazda, M. DziubińskiGraphical abstract (Source: Chemical Engineering and Processing: Process Intensification)
Source: Chemical Engineering and Processing: Process Intensification - December 16, 2016 Category: Chemistry Source Type: research

The study of influence of a rotating magnetic field on mixing efficiency
Publication date: Available online 14 December 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): Rafał Rakoczy, Alicja Przybył, Marian Kordas, Maciej Konopacki, Radosław Drozd, Karol Fijałkowski The study presents the results of an experimental analysis of the mixing process under the influence of a rotating magnetic field (RMF). Dimensionless correlations are proposed to predict the power consumption and mixing time for the analyzed mixing system. The results showed that the mixing behavior of the RMF mixer may be described by means of the dimensionless mixing energy as the product o...
Source: Chemical Engineering and Processing: Process Intensification - December 15, 2016 Category: Chemistry Source Type: research

Process Intensification of Tetrazole reaction through tritylation of 5-[4 ′-(Methyl) Biphenyl-2-Yl] using micoreactors
Publication date: Available online 14 December 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): Yadagiri Maralla, Shirish Sonawane, Dhurke Kashinath, Makarand Pimplapure, Banoth Paplal Currently, process intensification research is focused on use of the continuous micro reactor over the batch reactors. The micro reactor process gives continuous product output, effective micro mixing and better yield in small residence time over batch reactors. A continuous flow process has been successfully developed for the tritylation of 5-(4'-methyl-[1,1′-biphenyl]-2-yl)-1H-tetrazole [MBPT] usin...
Source: Chemical Engineering and Processing: Process Intensification - December 15, 2016 Category: Chemistry Source Type: research

CFD analysis of fluidized beds using wastes from post-consumer carton packaging
Publication date: Available online 9 December 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): T.M. Freitas, L.S. Arrieche, D.C. Ribeiro, D. Gidaspow, M.S. Bacelos Fluidized bed reactors can be used for fast pyrolysis of polyethylene-aluminum composite (LDPE/Al) to achieve good gas-solid mixing together with high rates of heat and mass transfer in bed columns. Pyrolysis of waste from post-consumer carton package (i.e., polyethylene-aluminum composite) reduces the manufacturing costs of new packages as it permits to produce them using the recovered aluminum and polyethylene in the process...
Source: Chemical Engineering and Processing: Process Intensification - December 10, 2016 Category: Chemistry Source Type: research

Influence of acoustic resonance on mixing enhancement in confined mixing layers
Publication date: Available online 5 December 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): Wei Zhao, Guiren Wang Extraordinarily rapid mixing has surprisingly been achieved in confined mixing layers by active forcing within an optimal narrow frequency band (Wang, PhD Dissertation, 1999; Wang, Chem. Eng. Sci., 2003; Wang, AIChE J., 2006). However, the corresponding mechanism of the large receptivity and rapid mixing is still unclear so far. Since it is found that the optimal frequency that corresponds to the rapid mixing is independent of Reynolds number or bulk flow velocity, we post...
Source: Chemical Engineering and Processing: Process Intensification - December 6, 2016 Category: Chemistry Source Type: research

Molecular structure effects of [NR,222][Tf2N] ionic liquids on their flow properties in the microfluidic chip reactor —a complete validation study
Publication date: Available online 1 December 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): Petr Kluson, Petr Stavarek, Vera Penkavova, Hana Vychodilova, Stanislav Hejda, Dalibor Vlcek, Magdalena Bendova N-alkyl-triethylammonium bis(trifluoromethanesulfonyl)imides ([NR,222][Tf2N]) ionic liquids (different in the length of their alkyl chain) are well suited for accommodating chiral catalytic organometallics in stereoselective hydrogenation reactions. It appears, particularly in the field of industrial fine chemistry that such transformations might be of high practical importance if per...
Source: Chemical Engineering and Processing: Process Intensification - December 2, 2016 Category: Chemistry Source Type: research

Intensification of liquid-liquid mass transfer in micromixer assisted by ultrasound irradiation and Fe3O4 nanoparticles
Publication date: Available online 26 November 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): Masoud Rahimi, Omid Jafari, Ashkan Mohammdifar In the present study, Cu (II) removal from aqueous solution was performed in a micromixer by using D2EHPA solvent. The impact of nanoparticles addition, ultrasound wave irradiation and combination of them for improving mixing and mass transfer was investigated. The experiments were carried out in three different ultrasound input electrical powers (3.5–7W). A constant concentration of nanoparticles (0.01w/v) was employed in a reactor consists...
Source: Chemical Engineering and Processing: Process Intensification - November 26, 2016 Category: Chemistry Source Type: research

Enzyme kinetics for the transesterification of ethyl butyrate with enzyme beads, coated packing and ultrasound assistance
Publication date: Available online 14 November 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): Matthias Wierschem, Olga Walz, Alexander Mitsos, Maren Termuehlen, Anna Lena Specht, Katrin Kissing, Mirko Skiborowski The use of immobilized enzymes as renewable biocatalysts is gaining attention in the scientific community. The immobilization of enzymes is necessary to avoid a complex separation and recovery of the enzymes and to also apply enzymes in an Enzymatic Reactive Distillation (ERD). The ERD helps to further overcome the equilibrium limitations of transesterification reactions by me...
Source: Chemical Engineering and Processing: Process Intensification - November 15, 2016 Category: Chemistry Source Type: research

Carbon dioxide (CO2) absorption and interfacial mass transfer across vertically confined free liquid film-a numerical investigation
Publication date: Available online 11 November 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): Jianguang Hu, Xiaogang Yang, Jianguo Yu, Gance Dai CO2 absorption by a confined free film has been investigated using the CFD approach. Particular attention focuses on the relationship between mass transfer and flow behaviour of the confined free film. Simulation results show that the average KL value grows 26.9% for the open window region and 17.4% for the lower-wall region, respectively, in comparison to the values in the upper-wall region, and the average KL value of confined free film alon...
Source: Chemical Engineering and Processing: Process Intensification - November 12, 2016 Category: Chemistry Source Type: research

Integration of IGCC and methane reforming process for power generation with CO2 capture
In this study, two IGCC process models have been evaluated in terms of both the process performance and economics with CO2 capture. Case 1 is based on the conventional IGCC process, whereas, case 2 presents an idea of integrating methane reforming process with an IGCC technology. The high enthalpy steam generated during coal slurry gasification process is used to assist the reforming process for H2 generation. The integration of IGCC with methane reforming process not only supplies the heat required for the endothermic reforming process but also increases the heating value of the resulting syngas. This concept also provide...
Source: Chemical Engineering and Processing: Process Intensification - November 6, 2016 Category: Chemistry Source Type: research

Intensification of mixing of shear-thinning fluids possessing yield stress with the coaxial mixers composed of two different central impellers and an anchor
Publication date: Available online 3 November 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): Argang Kazemzadeh, Farhad Ein-Mozaffari, Ali Lohi, Leila Pakzad The performance of different configurations of coaxial mixers composed of a wall scraping anchor impeller in combination with two different or identical central high speed impellers in the agitation of the shear-thinning fluids with yield stress (e.g. xanthan gum solution) was investigated. These multi-impeller mixers are more compact for the larger scale of mixing operations. The coaxial mixers employed in this study were the Scab...
Source: Chemical Engineering and Processing: Process Intensification - November 4, 2016 Category: Chemistry Source Type: research

General design methodology for reactive liquid –liquid extraction: Application to dicarboxylic acid recovery in fermentation broth
Publication date: Available online 13 October 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): Benoit Mizzi, Michel Meyer, Laurent Prat, Frédéric Augier, Damien Leinekugel-Le-Cocq A general design methodology for reactive liquid–liquid extraction is introduced in this paper. It is composed of three different steps: feasibility analysis, pre-design determination and simulation validation. This paper is focused on the first and the second step. This methodology leads to the design specifications of the units from the information concerning the physico-chemical behaviour...
Source: Chemical Engineering and Processing: Process Intensification - October 29, 2016 Category: Chemistry Source Type: research

Novel continuous catalytic hydrogenation process for the synthesis of diacetone-d-allose
Publication date: Available online 17 October 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): Anne Müller, Jana Kanz, Stefan Haase, Karin Becker, Hans-Matthias Vorbrodt Diacetone-d-allose is an important building block for the synthesis of pharmaceutical ingredients. The current batch production process involves a chemical oxidation and a reduction step that include hazardous reagents, produce a large amount of waste and require an extensive downstream processing. Current investigations aim to develop a catalytic reduction process of the intermediate diacetone-d-ketoglucose (DAKG) ...
Source: Chemical Engineering and Processing: Process Intensification - October 29, 2016 Category: Chemistry Source Type: research

Determination of Slip and Characteristic Velocities in Reactive Extraction with Experiments in the Oldshue-Rushton Column and Presence of Samarium and Gadolinium Metals
Publication date: Available online 26 October 2016 Source:Chemical Engineering and Processing: Process Intensification Author(s): Rezvan Torkaman, Mehdi Asadollahzadeh, Meisam Torab-Mostaedi The slip and characteristic velocities of the reactive system (samarium, gadolinium and D2EHPA) were investigated in the pilot plant Oldshue-Rushton extraction column. The experiments were carried out at the extraction and stripping stage. The influences of the agitation speed, dispersed as well as continuous phase velocity were studied. An increase in dispersed phase velocity led to the increase of the slip velocity while it decrease...
Source: Chemical Engineering and Processing: Process Intensification - October 29, 2016 Category: Chemistry Source Type: research

Feasibility of sweeping gas membrane distillation on concentrating triethylene glycol from waste streams
In this study, sweeping gas membrane distillation (SGMD) was applied to investigate both the potential of process intensification of triethylene glycol (TEG) from binary solutions (water and TEG) and from real wastewater. A hydrophobic hollow fiber membrane module (0.255m2) was operated with both synthetic and real TEG wastewater. The feasibility of SGMD for concentrating TEG was done by evaluating various key factors which where; optimizing operating condition like feed temperature, feed flow rate, and sweeping gas flow rate vs permeate flux, energy consumption evaluation and fouling analysis. Experimental results showed ...
Source: Chemical Engineering and Processing: Process Intensification - October 29, 2016 Category: Chemistry Source Type: research