Experimental assessment of a new device for gas–liquid separation
Publication date: September 2019Source: Chemical Engineering Research and Design, Volume 149Author(s): S. Noor, H.M. SolimanAbstractAn experimental investigation was conducted with a combined impacting tee junction in order to study its phase-separation capability for air–water two-phase flows. The combined junction consisted of one horizontal and two vertical impacting tee junctions; all equal-sided with internal diameter 13.5-mm. All experiments were conducted at a pressure of 200 kPa (abs) and ambient temperature. Two sets of data were generated; one set defines the limiting conditions of inlet gas and liquid...
Source: Chemical Engineering Research and Design - July 19, 2019 Category: Chemistry Source Type: research

Evaluation of mass transfer resistance across the interface for CO2–propylene carbonate system: experimental and mathematical modeling
Publication date: September 2019Source: Chemical Engineering Research and Design, Volume 149Author(s): Shima AziziAbstractIn this work, solubility and diffusivity of CO2 in propylene carbonate have been experimentally obtained using the pressure decay method. Pressure decay data were produced at three different temperatures of 276.15, 298.15, and 328.15 K, and different initial pressures. The tests were conducted with and without mechanical stirrer to obtain solubility and diffusivity, respectively. The solubility data showed that CO2–propylene carbonate system properly obeys the Henry’s law. To evaluate t...
Source: Chemical Engineering Research and Design - July 19, 2019 Category: Chemistry Source Type: research

Direct filtration procedure to attain antibacterial TFC membrane: A facile developing route of membrane surface properties and fouling resistance
In this study, anti-bacterial polyamide thin film composite (PA-TFC) decorated with hydrophilic polyrhodanine (PRh) nanoparticles was fabricated through a novel route of direct filtration method. This method is a facile technique for modification of the membrane surface, in particular, for recovery of the membrane antibacterial agent which is lost during the process. The synthesized membranes were studied for morphology, surface functional groups, hydrophilicity, and surface roughness via FESEM, FTIR, contact angle, and AFM analysis. Both diffusion inhibition zone and colony formation unit tests exhibited excellent biocida...
Source: Chemical Engineering Research and Design - July 18, 2019 Category: Chemistry Source Type: research

Achieving no spent brine discharge in an anion exchange resin-based fixed-bed process for typical DOM removal
This study investigated the long-term removal (from the feed) and accumulation (in the inorganic regenerant) characteristics of typical DOM molecules (including anionic pharmaceuticals, short-chain aliphatic acids, humic substances and amino acids) during ˜50 adsorption–regeneration cycles of an AER-based fixed-bed process with the routine physico-chemical purification treatment of the regenerant. All anionic DOM molecules complied with common long-term removal and accumulation mechanisms driven by both electrostatic and non-electrostatic interactions in a multicomponent system, regardless of aromatic structure...
Source: Chemical Engineering Research and Design - July 18, 2019 Category: Chemistry Source Type: research

An analytical method for the optimization of pore network in lithium-ion battery electrodes
Publication date: Available online 17 July 2019Source: Chemical Engineering Research and DesignAuthor(s): Guanghua Ye, Weiwen Tong, Xinlei Liu, Xinkuan Song, Jinghong Zhou, Xinggui ZhouAbstractEngineering the hierarchical pore network structure is one effective way to improve the lithium-ion battery electrodes without changing their materials chemistry. Herein, a simple yet powerful analytical method is developed to design the electrode with the hierarchical pore network. In this method, the analytical expression of the effective tortuosity is obtained as the objective function, which can well reflect the electrode perform...
Source: Chemical Engineering Research and Design - July 18, 2019 Category: Chemistry Source Type: research

An Experimental Study of CO2 Gasification Kinetics during Activation of a Spent Tyre Pyrolysis Char
Publication date: Available online 15 July 2019Source: Chemical Engineering Research and DesignAuthor(s): Jorge Preciado-Hernandez, Juan Zhang, Mingming Zhu, Zhezi Zhang, Dongke ZhangAbstractThe reaction kinetics of CO2 gasification during the activation of a spent tyre pyrolysis char was investigated. Activation experiments were conducted under atmospheric pressure to examine the effect of CO2 concentration (33.3% to 66.7 vol.% CO2 in CO2/N2 mixture), temperature (750 to 1050 °C) and reaction time (1 to 6 h) on the fixed carbon conversion. The BET surface area of the activated chars as a function ...
Source: Chemical Engineering Research and Design - July 16, 2019 Category: Chemistry Source Type: research

Investigation on hydrodynamics and mass transfer in a feed channel of a spiral-wound membrane element using response surface methodology
Publication date: Available online 13 July 2019Source: Chemical Engineering Research and DesignAuthor(s): Nematollah Mansouri, Mahdi Moghimi, Morteza TaherinejadAbstractUsing the response surface methodology (RSM) coupled with computational fluid dynamics, the hydrodynamic and mass transfer have been investigated in a spacer-filled channel. Geometry of an industrial reverse osmosis spiral-wound membrane module has been set to optimize the pressure drop, water permeation flux and the spacer configuration efficacy with respect to the average inlet velocity, the spacer attack angle and the spacer mesh angle. Several tools hav...
Source: Chemical Engineering Research and Design - July 14, 2019 Category: Chemistry Source Type: research

Application of Critical Path Method to Stochastic Processes with Historical Operation Data
Publication date: Available online 12 July 2019Source: Chemical Engineering Research and DesignAuthor(s): Yuya Takakura, Tomoyuki Yajima, Yoshiaki Kawajiri, Susumu HashizumeAbstractThe CPM (Critical Path Method) is a network-based approach for project management. This method identifies the longest path, which allows us to find the critical path that must be shortened so that the completion time of the whole project can be shortened. However, considering uncertainty in CPM is not straightforward. In this paper, we consider an optimization problem for stochastic CPM problems, where task durations are expressed as discrete hi...
Source: Chemical Engineering Research and Design - July 13, 2019 Category: Chemistry Source Type: research

Operational Safety via Model Predictive Control: The Torrance Refinery Accident Revisited
Publication date: Available online 12 July 2019Source: Chemical Engineering Research and DesignAuthor(s): Zhihao Zhang, Zhe Wu, David Rincon, Panagiotis D. ChristofidesAbstractAn accidental explosion at the refinery operated by ExxonMobil in Torrance, California occurred in 2015 during operation at the Safe Park mode via the operations and integrity management system (OIMS) is analyzed in this work, and a control-based approach is presented for how the accident could have been potentially avoided. Specifically, this work reproduces and tackles the accident in Torrance, California in 2015 by dynamical modeling of the fluid ...
Source: Chemical Engineering Research and Design - July 13, 2019 Category: Chemistry Source Type: research

Combined Manganese Oxides as Oxygen Carriers for Biomass Combustion – Ash Interactions
Publication date: Available online 10 July 2019Source: Chemical Engineering Research and DesignAuthor(s): Ivana Staničić, Viktor Andersson, Malin Hanning, Tobias Mattisson, Rainer Backman, Henrik LeionAbstractCarbon capture and storage (CCS) has been acknowledged as an important strategy for mitigation of climate change. Although highly applicable for fossil fuels, CCS with biomass could have the added advantage of resulting in negative emissions of carbon dioxide. One promising carbon capture technology is chemical-looping combustion (CLC). In CLC the reactors are filled with metal oxide bed material called oxygen carri...
Source: Chemical Engineering Research and Design - July 12, 2019 Category: Chemistry Source Type: research

Evaluation of mass transfer resistance across the interface for CO2-propylene carbonate system: experimental and mathematical modeling
Publication date: Available online 10 July 2019Source: Chemical Engineering Research and DesignAuthor(s): Shima AziziAbstractIn this work, solubility and diffusivity of CO2 in propylene carbonate have been experimentally obtained using the pressure decay method. Pressure decay data were produced at three different temperatures of 276.15, 298.15, and 328.15 K, and different initial pressures. The tests were conducted with and without mechanical stirrer to obtain solubility and diffusivity, respectively. The solubility data showed that CO2- propylene carbonate system properly obeys the Henry's law. To evaluate the dif...
Source: Chemical Engineering Research and Design - July 12, 2019 Category: Chemistry Source Type: research

Single and Multiphase CFD Simulations for Designing Cavitating Venturi
Publication date: Available online 9 July 2019Source: Chemical Engineering Research and DesignAuthor(s): Gaurav G. Dastane, Harsh Thakkar, Rushabh Shah, Sivaramakrishna Perala, Janhavi Raut, A.B. PanditAbstractHydrodynamic cavitation (HC) is becoming a popular process intensification tool for many industrial processes. It has its applications in emulsification, advanced oxidation processes, nano-material synthesis etc. Venturi is one of the most commonly used device to generate hydrodynamic cavitation at laboratory as well as industrial scale. Recently researchers have taken interest to find the effect of the geometric des...
Source: Chemical Engineering Research and Design - July 10, 2019 Category: Chemistry Source Type: research

Experimental assessment of a new device for gas-liquid separation
Publication date: Available online 8 July 2019Source: Chemical Engineering Research and DesignAuthor(s): S. Noor, H.M. SolimanAbstractAn experimental investigation was conducted with a combined impacting tee junction in order to study its phase-separation capability for air-water two-phase flows. The combined junction consisted of one horizontal and two vertical impacting tee junctions; all equal-sided with internal diameter 13.5-mm. All experiments were conducted at a pressure of 200 kPa (abs) and ambient temperature. Two sets of data were generated; one set defines the limiting conditions of inlet gas and liquid s...
Source: Chemical Engineering Research and Design - July 9, 2019 Category: Chemistry Source Type: research

Blue lemon@quaternary graphene oxide open frameworks: As a novel nanostructure for performance enhancement of thin film nanocomposite forward osmosis membrane
This study investigates the preparation of thin film nanocomposite (TFN) membranes by incorporating polyoxometalate based open frameworks (POM-OFs) within polyamide active layer. The POM-OFs was synthesized using quaternary graphene oxide (QGO) as an organic cationic linker and blue lemon polyoxometalate as POM unite that termed as LGO-OFs. Thin-film composite (TFC) forward osmosis (FO) membrane was prepared by interfacial polymerization procedure using m-phenylenediamine (MPD) dispersion in water and trimesoyl chloride (TMC) dispersion in an organic solvent as two immiscible monomers solution. To fabricate TFN membranes, ...
Source: Chemical Engineering Research and Design - July 7, 2019 Category: Chemistry Source Type: research

Investigation of the cohesive strength of membrane fouling layers formed during cross-flow microfiltration: The effects of pH adjustment on the properties and fouling characteristics of microcrystalline cellulose
Publication date: Available online 6 July 2019Source: Chemical Engineering Research and DesignAuthor(s): Mi Zhou, Hilda Sandström, Maria-Paraskevi Belioka, Torbjörn Pettersson, Tuve MattssonAbstractFluid dynamic gauging was used to investigate the cohesive strength of the membrane fouling layer formed during cross-flow microfiltration of microcrystalline cellulose. Fouling behaviour was compared at two pH levels (i.e. different surface charges of the particles and membranes) with two membranes (i.e. regenerated cellulose and polyethersulphone). It was found that a suspension at low pH, where the surface charge of...
Source: Chemical Engineering Research and Design - July 7, 2019 Category: Chemistry Source Type: research

Development of soft sensors for isomerization process based on support vector machine regression and dynamic polynomial models
Publication date: Available online 4 July 2019Source: Chemical Engineering Research and DesignAuthor(s): Srečko Herceg, Željka Ujević Andrijić, Nenad BolfAbstractA novel data-driven soft sensor models for application in the refinery isomerization process are presented. Soft sensor models based on support vector machine regression (SVM) and dynamic polynomial linear Finite Impulse Response (FIR), Autoregressive with Exogenous Inputs (ARX), Output Error (OE), and Nonlinear Dynamic Autoregressive with Exogenous Inputs (NARX) and Hammerstein-Wiener (HW) models are developed. They are intended for continuous estimation of k...
Source: Chemical Engineering Research and Design - July 6, 2019 Category: Chemistry Source Type: research

A Paper about the Slope of the Equilibrium Line
The objective of this paper is to present a new method of approximating the slope in multicomponent systems based on differentiation of the phase equilibrium surface with respect to the mole fraction of the design component, defined as that compound we seek to eliminate from the mixture in a particular section of the column. There is only one design compound per column section. The approach presented here can be easily applied to absorber and stripper columns, where the concept of key components is not applicable.Two analytical approximate methods of estimating the design slope are shown to be in good agreement with the ri...
Source: Chemical Engineering Research and Design - July 4, 2019 Category: Chemistry Source Type: research

Process analysis of extractive distillation for the separation of ethanol–water using deep eutectic solvent as entrainer
Publication date: August 2019Source: Chemical Engineering Research and Design, Volume 148Author(s): Xianyong Shang, Shoutao Ma, Qi Pan, Jinfang Li, Yinhai Sun, Kai Ji, Lanyi SunAbstractDeep eutectic solvents (DESs) as novel entrainers can be used for the separation of azeotropic mixture, and have received much attention in recent years. However, the researches about DESs mainly focus on vapor–liquid equilibrium (VLE) and extractive distillation experiment. In this work, an overall extractive distillation process for ethanol dehydration using ChCl/Urea (1:2) as entrainer is investigated. The physical properties of the...
Source: Chemical Engineering Research and Design - July 3, 2019 Category: Chemistry Source Type: research

Predictive Modeling of A Commercial Spiral Wound Seawater Reverse Osmosis Module
Publication date: Available online 2 July 2019Source: Chemical Engineering Research and DesignAuthor(s): Mingheng LiAbstractA predictive model based on the solution-diffusion theory is proposed for commercial Filmtec 30 SW 2.5” spiral wound reverse osmosis modules. The model explicitly accounts for longitudinal pressure drop in the retentate channel and spiral pressure drop in the permeate channel, concentration polarization phenomenon, and effect of temperature on water and salt permeability. Using experimental data from literature, it is shown that the Darcy friction coefficients in the retentate and permeate chann...
Source: Chemical Engineering Research and Design - July 3, 2019 Category: Chemistry Source Type: research

Investigating the Cross-Sectional Gas Holdup Distribution in a Split Internal-loop Photobioreactor during Microalgae Culturing Using a Sophisticated Computed Tomography (CT) Technique
In this study, an advanced noninvasive gamma-ray computed tomography (CT) technique was used for the first time to visualize and quantify the cross-sectional gas holdup distribution of the multiphase flow of an air-water-microalgae system in a cylindrical split airlift photobioreactor. The gas holdup distribution and their radial profiles were investigated during the culturing of the green microalgae Scenedesmus. The gas phase distribution in the entire reactor, including riser region, downcomer region, distribution regions, as well as their distributions above and below the split plate was also characterized, along with t...
Source: Chemical Engineering Research and Design - July 3, 2019 Category: Chemistry Source Type: research

Liquid–liquid flow patterns and slug characteristics in cross-shaped square microchannel for cryogel beads preparation
Publication date: August 2019Source: Chemical Engineering Research and Design, Volume 148Author(s): Tingting Guan, Qin Yan, Lizhi Wan, Songhong Zhang, Linhong Xu, Jianli Wang, Junxian YunAbstractFor preparing cryogel beads by the micro-flow-focusing and cryo-polymerization method, liquid–liquid flow patterns and slug characteristics for the system of Dex-MA and ethyl acetate and the system of Dex-MA-HEMA and ethyl acetate in a cross-shaped square microchannel were studied. The aqueous solutions of Dex-MA-HEMA and Dex-MA were used as the dispersed phase and ethyl acetate as the continuous phase. The formation mechanis...
Source: Chemical Engineering Research and Design - July 3, 2019 Category: Chemistry Source Type: research

Optimal production of syngas via super-dry reforming. analysis for natural gas and biogas under different co2 taxes
Publication date: Available online 26 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Borja Hernández, Mariano MartínABSTRACTThis work presents a mathematical optimization approach that evaluates the use of super-dry reforming (SDR) together other reforming technologies, water-gas-shift and hydrogen from electrolysis. The aim is to produce syngas with different H2:CO ratios, taking into account two methane sources: natural gas and biogas. A superstructure is developed and optimized using an economic objective function that considers carbon taxes as parameter to determine the most profitabl...
Source: Chemical Engineering Research and Design - June 27, 2019 Category: Chemistry Source Type: research

Inside Front Cover
Publication date: July 2019Source: Chemical Engineering Research and Design, Volume 147Author(s): (Source: Chemical Engineering Research and Design)
Source: Chemical Engineering Research and Design - June 27, 2019 Category: Chemistry Source Type: research

Contents
Publication date: July 2019Source: Chemical Engineering Research and Design, Volume 147Author(s): (Source: Chemical Engineering Research and Design)
Source: Chemical Engineering Research and Design - June 27, 2019 Category: Chemistry Source Type: research

A review on mechanical activation and mechanical alloying in stirred media mill
Publication date: Available online 24 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Gábor MucsiAbstractComminution in stirred media mills is a frequently applied top-down method towards the pro-duction of micron- and submicron particles. However, due to the high energy density, this type of mill is appropriate for mechanical activation (MA) as well. Despite the vast field of mechanochemistry which encompasses an increase in reactivity by mechanical energy input, there is only limited publication on stirred media mill-based MA until now. The main focus of this paper is the short introduction of ...
Source: Chemical Engineering Research and Design - June 25, 2019 Category: Chemistry Source Type: research

Dimensionless numbers for solubility and mass transfer rate of CO2 absorption in MEA in presence of additives
This study aimed to compare the both solubility and mass transfer rate of CO2 in monoethanolamine (MEA) in the presence of various additives, including Titanium dioxide (TiO2) and Graphene oxide (GO) nanoparticles as well as two surfactants named Tetra-n-butylammonium bromide (TBAB) and Sodium dodecyl sulfate (SDS) using dimensionless numbers. Batch gas absorption experiments were performed at ambient temperature and various concentrations of additives from 0 to 0.1 wt% at an initial pressure of 20 bar. By recording changes in the temperature and pressure of the gas in the loading tank, the number of CO2 mole...
Source: Chemical Engineering Research and Design - June 22, 2019 Category: Chemistry Source Type: research

Investigating the effects of mixing ionic liquids on their density, decomposition temperature, and gas absorption
Publication date: Available online 21 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Tausif Altamash, Majeda Khraisheh, M Fahed QureshiAbstractIn order to counter the detrimental effect of chemicals on the environment, the academic and industry research interest have shifted towards “green” solvents. Ionic liquids (ILs) are salt-like compounds that, with few exceptions, are known to have negligible vapor pressure and are widely proclaimed as green solvents. Their physical properties can be tailored for the desired purpose by the careful selection of cation and anion or by mixing with other ...
Source: Chemical Engineering Research and Design - June 22, 2019 Category: Chemistry Source Type: research

Structural optimization of a demulsification and dewatering device coupled with swirl centrifugal and high-voltage fields by response surface methodology combined with numerical simulation
Publication date: Available online 20 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Haifeng Gong, Bao Yu, Xianming Zhang, Ye Peng, Yunqi LiuAbstractThe demulsification and dewatering treatments of emulsion are the critical link in the recycling technologies of industrial waste oil. A device coupled with centrifugal and high-voltage fields were proposed for the emulsion with a high content and a complicated composition, which cannot be achieved using a single method. Combining with the governing equations of flow field, electric field and droplet size, the numerical simulation model of the coupling dev...
Source: Chemical Engineering Research and Design - June 21, 2019 Category: Chemistry Source Type: research

Production of levulinic acid from glucose in sulfolane/water mixtures
In this study, the effect of sulfolane as solvent in sulphuric acid catalysed levulinic acid production from glucose was investigated. The broad sulfolane concentration range was systematically studied and a kinetic model was developed to describe the levulinic acid production. A significant increase in glucose conversion rate was observed when the proportion of sulfolane in the solvent mixture was increased. The maximum selectivity of the levulinic acid production was found to be slightly over 50 % and independent of the solvent composition. Thus, with sulfolane solvent, the same yields can be obtained in a significantly ...
Source: Chemical Engineering Research and Design - June 21, 2019 Category: Chemistry Source Type: research

Effect of residence time and energy dissipation on drop size distribution for the dispersion of oil in water using KMS and SMX+ static mixer
Publication date: Available online 20 June 2019Source: Chemical Engineering Research and DesignAuthor(s): G. Forte, E. Brunazzi, F. AlberiniAbstractThe Planar Laser Induced Fluorescence technique was used to determine the drop size distribution of oil dispersed in water at the inlet and outlet of two static mixer geometries (KMS and Sulzer_SMX+) equipped with either 6 or 12 elements. A mineral oil (Lytol®), three times more viscous than the water continuous phase, was used as the dispersed phase. The oil flow rate was kept constant through all experiments forcing the drop detachment from the secondary inlet. The L-L sy...
Source: Chemical Engineering Research and Design - June 21, 2019 Category: Chemistry Source Type: research

An experimental study on single drop rising in a low interfacial tension liquid–liquid system
Publication date: Available online 20 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Jiyizhe Zhang, Yundong Wang, Geoffrey W. Stevens, Weiyang FeiAbstractTerminal velocity of liquid drops is one of the key parameters in liquid-liquid extraction column design. It is important in determining residence time, droplet lifetime, and mass transfer rate. In present paper, the rising behavior of a single drops were investigated in a low interfacial tension system by high speed camera. An n-butanol/water system was used as test system. Correlations for terminal velocity were evaluated and compared, both explicit...
Source: Chemical Engineering Research and Design - June 21, 2019 Category: Chemistry Source Type: research

CFD-DEM modelling of particles attrition in jet-in-fluidized beds
Publication date: Available online 19 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Nazanin Ghods, Shahab Golshan, Reza Zarghami, Rahmat Sotudeh-GharebaghAbstractAn improved CFD-DEM model for simulation of particles attrition is presented in this research. Hertzian contact stress was used to compute the stresses acting on particles and the Weibull distribution was used to calculate the breakage probability. Two breakage models were used to calculate size distribution of debris from particle attrition. These models were implemented to simulate a jet-in-fluidized bed. Breakage results, including spatial...
Source: Chemical Engineering Research and Design - June 20, 2019 Category: Chemistry Source Type: research

Kinetics of hematite to magnetite transformation by gaseous reduction at low concentration of carbon monoxide
Publication date: Available online 19 June 2019Source: Chemical Engineering Research and DesignAuthor(s): V.P. Ponomar, O.B. Brik, Yu.I. Cherevko, V.V. OvsienkoAbstractHematite-containing material is accumulated during exploitation and beneficiation of magnetite ore, thus forming tailings and other industrial wastes. Hence, processing the low-grade hematite ore becomes extremely important for the metallurgical industry. The transformation of weakly magnetic hematite into magnetite can enhance the efficiency of magnetic separation. In this work, chemical reduction of hematite to magnetite in an atmosphere with different gas...
Source: Chemical Engineering Research and Design - June 20, 2019 Category: Chemistry Source Type: research

Liquid-liquid flow patterns and slug characteristics in cross-shaped square microchannel for cryogel beads preparation
Publication date: Available online 19 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Tingting Guan, Qin Yan, Lizhi Wan, Songhong Zhang, Linhong Xu, Jianli Wang, Junxian YunAbstractFor preparing cryogel beads by the micro-flow-focusing and cryo-polymerization method, liquid-liquid flow patterns and slug characteristics for the system of Dex-MA and ethyl acetate and the system of Dex-MA-HEMA and ethyl acetate in a cross-shaped square microchannel were studied. The aqueous solutions of Dex-MA-HEMA and Dex-MA were used as the dispersed phase and ethyl acetate as the continuous phase. The formation mechanis...
Source: Chemical Engineering Research and Design - June 20, 2019 Category: Chemistry Source Type: research

Computing Meaningful Models of Continuous Data
Publication date: Available online 19 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Francis B. Lavoie, Koji Muteki, Ryan GosselinAbstractParameters controlling continuous chemical processes as well as all instruments found in such processes generate a huge amount of data. Calculating models to predict critical quality attributes (in y) from process data (in X) can be fastidious. Partial-Least-Squares (PLS) regression is now widely present in the industry for process analysis and modelling purposes. However, this methodology requires static data while the majority of chemical processes operate continuo...
Source: Chemical Engineering Research and Design - June 20, 2019 Category: Chemistry Source Type: research

Synthesis and characterization of silver loaded alumina and evaluation of its photo catalytic activity on photo degradation of methylene blue dye
In this study, silver loaded alumina was synthesized by immobilization of Ag nanoparticles on Al2O3 by facile green method with Azadirachta indica leaves extract and characterized by different advanced techniques. The prepared Ag-Al2O3 particles were tested as photo catalyst on degradation of methylene blue under visible irradiation. Ag-Al2O3 showed improved photo catalytic performance on photo degradation of methylene blue. The deposition of Ag enhanced the photo catalytic activity of Al2O3 from 35 to 95% degradation of methylene blue. Effect of various parameters on catalytic activity were investigated. Curve Expert comp...
Source: Chemical Engineering Research and Design - June 20, 2019 Category: Chemistry Source Type: research

Process analysis of extractive distillation for the separation of ethanol-water using deep eutectic solvent as entrainer
Publication date: Available online 18 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Xianyong Shang, Shoutao Ma, Qi Pan, Jinfang Li, Yinhai Sun, Kai Ji, Lanyi SunAbstractDeep eutectic solvents (DESs) as novel entrainers can be used for the separation of azeotropic mixture, and have received much attention in recent years. However, the researches about DESs mainly focus on vapor-liquid equilibrium (VLE) and extractive distillation experiment. In this work, an overall extractive distillation process for ethanol dehydration using ChCl/Urea (1:2) as entrainer is investigated. The physical properties of the...
Source: Chemical Engineering Research and Design - June 19, 2019 Category: Chemistry Source Type: research

Bubble behavior in gas–solid bubbling fluidized beds based on EMMS model: comparison of 2D, Q2D and 3D simulation
Publication date: Available online 18 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Hao Wang, Youjun Lu, Kenan XiAbstractIn this work, bubbling fluidized beds in two-, quasi-two- and three-dimensional geometries are simulated by Eulerian-Eulerian two-fluid model (TFM) coupled with energy minimization multi-scale model (EMMS). Results including bubble diameter, bubble vertical velocity, shape factor and aspect ratio as well as bed height are investigated. Simulation results show that vertical velocities of two- and quasi-two-dimensional bubbles are in good agreement with empirical correlations. Equival...
Source: Chemical Engineering Research and Design - June 19, 2019 Category: Chemistry Source Type: research

On the reliability of lab-scale experiments for the determination of membrane specific flux measurements in organic solvent nanofiltration
Publication date: Available online 19 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Rebecca Goebel, Mareike Schreiber, Velichka Koleva, Melanie Horn, Andrzej Górak, Mirko SkiborowskiAbstractWhile the scale-up from flat-sheet lab-scale experiments to larger modules for an industrial application requires consideration of the module geometry and according hydrodynamics, it is of high importance that the lab-scale experiments provide an accurate estimate of the membrane performance at ideal hydrodynamic conditions to make a proper selection and potentially allow for a model-based evaluation of the ...
Source: Chemical Engineering Research and Design - June 19, 2019 Category: Chemistry Source Type: research

An improved design method for retrofitting industrial heat exchanger networks based on Pinch Analysis
Publication date: Available online 19 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Bao-Hong Li, Yan Edy Chota Castillo, Chuei-Tin ChangAbstractEnergy integration relies on matching process hot streams with process cold streams, and utilities are only introduced to balance the deficit in energy consumption. A systematic but simple Pinch Analysis(PA)-based retrofit approach is proposed to lessen the utility consumption of any industrial Heat Exchanger Network (HEN) under new minimum temperature approach (ΔTms) at the cost of minor capital investment. This work is an extended and improved version ...
Source: Chemical Engineering Research and Design - June 19, 2019 Category: Chemistry Source Type: research

An Empirical Model of Absorption of Nitric Oxide with Ammoniacal Cobalt (II) Solutions in a Spray Tower
Publication date: Available online 17 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Haiming Wang, Qinghai Li, Changfu You, Zhongchao TanAbstractAn empirical model was developed for the prediction of the absorption efficiency of nitric oxide (NO) into ammoniacal cobalt (II) solution in terms of gas flow rate, liquid flow rate, and temperature. The model parameters were determined experimentally using a spraying tower with initial absorbent solution pH of 10.0-10.2 for temperatures in the range of 281.15-323.15 K. The reactions between Co2+ complexes and NO were found to be in the fast pseudo-fir...
Source: Chemical Engineering Research and Design - June 18, 2019 Category: Chemistry Source Type: research

Pilot-scale experiment and simulation optimization of dual-loop wet flue gas desulfurization spray scrubbers
Publication date: Available online 15 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Mingchen Qin, Yong Dong, Lin Cui, Junwen Yao, Chunyuan MaAbstractThe efficiency of wet flue gas desulfurization (WFGD) used in thermal power plants that burn high-sulfur coal can be improved by adopting dual-loop spray tower (DLST). In this paper, the process of gas–liquid flow, mass transfer and chemical reaction in the DLST were fully investigated through a pilot-scale DLST and the corresponding numerical model. The numerical model was verified based on the experiment and applied to predict a DLST of 200&thinsp...
Source: Chemical Engineering Research and Design - June 16, 2019 Category: Chemistry Source Type: research

Experimental and bifurcation analysis of a hybrid CSTR plant
Publication date: Available online 14 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Piotr Skupin, Mieczyslaw Metzger, Piotr Laszczyk, Malgorzata NiedzwiedzAbstractThe classical continuous stirred tank reactor (CSTR) with an exothermic chemical reaction is known for its complex nonlinear behaviour. Therefore, it is often used as a benchmark plant for testing control algorithms. Since experimenting with a real chemical process can be dangerous (thermal runaway), computer simulations can be used in the controller design. On the other hand, simulation results are obtained for mathematical models that ofte...
Source: Chemical Engineering Research and Design - June 15, 2019 Category: Chemistry Source Type: research

Seawater desulphurization scrubbing in spray and packed columns for a 4.35 MW marine diesel engine
Publication date: August 2019Source: Chemical Engineering Research and Design, Volume 148Author(s): D. Flagiello, A. Parisi, A. Lancia, C. Carotenuto, A. Erto, F. Di NataleAbstractFlue Gas Desulphurization (FGD) is a key topic for all combustion fossil fuel plants and industrial applications. Wet processes are usually preferred when the removal efficiency required to comply with environmental regulation exceeds 90%. Recently, seawater (SW) has been considered as a viable absorbent for FGD processes in coastal and naval applications, thanks to its natural alkalinity and, of course, its large availability. Due to the typical...
Source: Chemical Engineering Research and Design - June 15, 2019 Category: Chemistry Source Type: research

Capillary condensation mechanism for gas transport in fiber reinforced poly (ether-b-amide) membranes
Publication date: Available online 13 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Mohammad Bagher Karimi, Shadi Hassanajili, Ghader KhanbabeiAbstractOne of the most important shortcomings of the polymeric membranes in comparison with inorganic membranes is the trade-off between permeability and selectivity. Gas permeability in inorganic membranes follows different mechanisms including capillary condensation mechanism. The aim of present study was improving the polymeric membranes performance by introducing capillary condensation mechanism for the gas transport similar to that observed in the inorgan...
Source: Chemical Engineering Research and Design - June 15, 2019 Category: Chemistry Source Type: research

CuBTC metal organic framework incorporation for enhancing separation and antifouling properties of nanofiltration membrane
Publication date: Available online 13 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Nurasyikin Misdan, Normarina Ramlee, Nur Hanis Hayati Hairom, Syarifah Nazirah Wan Ikhsan, Norhaniza Yusof, Woei Jye Lau, Ahmad Fauzi Ismail, Nik Abdul Hadi Md NordinAbstractNovel thin film nanocomposite (TFN) nanofiltration membrane with tunable physico-chemical properties and separation performances was fabricated by incorporating the copper benzene-1,3,5-tricarboxylate (CuBTC) nanoparticles with different concentrations (ranging from 0–0.75 wt.%) in the polysulfone (PSf) substrates, followed by the inte...
Source: Chemical Engineering Research and Design - June 15, 2019 Category: Chemistry Source Type: research

Experimental and numerical investigations of convection heat transfer in corrugated channels using alumina nanofluid under a turbulent flow regime
Publication date: Available online 13 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Raheem K. Ajeel, W.S-I.W. Salim, Khalid HasnanAbstractCombining corrugated surfaces and nanofluids technologies have a significant advantage to develop compact heat exchangers in order to produce more efficient and reliable thermal systems. In this paper, the employment of alumina oxide (Al2O3) in water nanofluid for heat transfer enhancement with corrugation is performed numerically and experimentally over Reynolds number ranges of 10,000–30,000. Three corrugated channels, semicircle (SCC), trapezoidal (TCC), an...
Source: Chemical Engineering Research and Design - June 15, 2019 Category: Chemistry Source Type: research

Evaluation of different solvent performance in a 0.7 MWe pilot scale CO2 capture unit
Publication date: August 2019Source: Chemical Engineering Research and Design, Volume 148Author(s): Reynolds A. Frimpong, Heather Nikolic, Jonathan Pelgen, Mahyar Ghorbanian, Jose D. Figueroa, Kunlei LiuAbstractNovel concepts for post-combustion CO2 capture have been demonstrated in a 0.7 MWe pilot-scale facility installed at Kentucky Utilities (KU) E.W. Brown Generating Station. The process which includes two-staged solvent stripping used a secondary air stripper to provide leaner regenerated solvents, and recycled CO2 to boiler to boost inlet CO2 concentrations to the absorber for enhanced mass transfer and increase...
Source: Chemical Engineering Research and Design - June 15, 2019 Category: Chemistry Source Type: research

Dynamic Analysis and Multiple Model Control of Continuous Microbial Fuel Cell (CMFC)
Publication date: Available online 12 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Ashish Yewale, Ravi Methekar, Shailesh AgrawalAbstractWater and energy scarcity are among the most serious challenges currently faced by the society. Microbial fuel cell is one such a technology, which simultaneously produces water and energy from waste water or organic matters. A robust control strategy is needed for smooth and continuous operation of cell. In this paper, first principle based model of microbial fuel cell is simulated and validated with experimental data from the literature. Selection of the manipulat...
Source: Chemical Engineering Research and Design - June 13, 2019 Category: Chemistry Source Type: research

Life Cycle Assessment and Optimization of Claus Reaction Furnace through Kinetic Modeling
Publication date: Available online 12 June 2019Source: Chemical Engineering Research and DesignAuthor(s): Samane ZareiAbstractA reaction scheme was developed to comply with the experimental data provided by the laboratory setup and industrial plants for the Claus reaction furnace. The proposed reaction scheme was applied in analyzing an industrial Claus reaction from environmental and economic points of view. By applying the modified Claus process, the total emissions from the processed acid gas was reduced about 52.34% compared to acid gas without treatment. The case studies showed that hydrogen sulfide and oxygen mole pe...
Source: Chemical Engineering Research and Design - June 13, 2019 Category: Chemistry Source Type: research