Trajectory optimization of an oscillating industrial two-stage evaporator utilizing a Python-Aspen Plus Dynamics toolchain
Publication date: Available online 24 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Mikael Yamanee-Nolin, Niklas Andersson, Bernt Nilsson, Mark Max-Hansen, Oleg PajalicAbstractEvaporators are integral parts of many separation processes across production industries, and they need to be well understood in order to be operated well, thereby enabling high resource-efficiency and productivity. In a previous investigation, the effects of disturbing oscillations in a two-stage evaporator system were quantified. In the current study, these oscillations were reduced through trajectory optimization using st...
Source: Chemical Engineering Research and Design - December 24, 2019 Category: Chemistry Source Type: research

Experimental studies on the performance and analysis of an electrostatic coalescer under different electrostatic boundary conditions
Publication date: Available online 19 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Pramod P. Kothmire, Yogesh J Bhalerao, Vijay M Naik, Rochish M Thaokar, Vinay A JuvekarAbstractThe rate of coalescence in an electrocoalescer, which governs the residence time, sensitively depends upon the electrostatic conditions as well as the electrodes arrangement. An experimental study of a cylindrical electrocoalescer vessel for two different modes of operation is reported in this work. The design of the coalescer is optimized for the residence time and water separation. To justify the experimental findings a...
Source: Chemical Engineering Research and Design - December 20, 2019 Category: Chemistry Source Type: research

Synthesis of water capture technologies for gas fired power plants in Qatar
Publication date: Available online 19 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Ahmed T. Yasir, Fadwa Eljack, Monzure-Khoda KaziAbstractFlue gas from gas fired power plants contains 10-16% (w/w) water vapor with considerable amount of latent heat. Although CO2 capture and utilization have received great attention, water capture from power plant has received limited attention. The power plants in Qatar exhaust 33 Million m3 of water per year. This paper explores selected alternative technologies namely absorption, compression & cooling, and quenching, to enable the recovery of water vapor c...
Source: Chemical Engineering Research and Design - December 20, 2019 Category: Chemistry Source Type: research

Graphene oxide aerogels co-functionalized with polydopamine and polyethylenimine for the adsorption of anionic dyes and organic solvents
Publication date: Available online 19 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Jun Xu, Peifang Du, Wendie Bi, Guohong Yao, Sisi Li, Hui LiuAbstractPolydopamine (PDA) and polyethylenimine (PEI) co-functionalized graphene oxide (GO) aerogel (PPGA) is rapidly synthesized at room temperature by a facile method. Glutaraldehyde acting as crosslinking agent accelerates rapid crosslinking of PDA-coated GO sheets with PEI, and three-dimensional hydrogel is formed within 3 min. The structure of PPGA is characterized by Field emission scanning electron microscope, Fourier transform infrared spectra, X-r...
Source: Chemical Engineering Research and Design - December 20, 2019 Category: Chemistry Source Type: research

Residence time distribution analysis in the transport and compressing screws of a biomass pretreatment process
Publication date: Available online 16 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Kevin Lachin, Ziad Youssef, Giana Almeida, Patrick Perre, Denis FlickAbstractThe raise of environmental concerns in the past decades consequently increased the need of obtaining cleaner sources of energy. Among the studied alternatives, second generation biofuels (produced from non-food resources) are one of the most promising solutions and nearly reached industrialization. The production of cellulosic bioethanol is one of the possibilities of second generation biofuels, and the studies involving the use of cellulo...
Source: Chemical Engineering Research and Design - December 17, 2019 Category: Chemistry Source Type: research

Centrifugal classification of pseudo-boehmite by mini-hydrocyclone in continuous-carbonation preparation process
Publication date: Available online 16 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Ziqiang Hu, Bingjie Wang, Zhishan Bai, Zhaojin Lu, Xiaoxue Hu, Shenghao Zhao, Huiqing LuoAbstractPseudo-boehmite (PB) is often used as a precursor for hydrotreating catalyst support (γ-Al2O3) in the petroleum refining process. Recently, continuous-carbonation process was proposed to prepare PB in order to meet the increasing demand for macroporous γ-Al2O3, but the highly dispersed particle size of PB in this process limited its development. To obtain the PB with monodispersed particle size, a 10 ...
Source: Chemical Engineering Research and Design - December 17, 2019 Category: Chemistry Source Type: research

QSPR study of the Henry’s law constant for heterogeneous compounds
Publication date: Available online 12 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Pablo R. Duchowicz, José F. Aranda, Daniel E. Bacelo, Silvina E. FioressiAbstractWe establish a Quantitative Structure-Property Relationships study on the Henry’s law constant of 530 heterogeneous compounds, including pesticides, solvents, aromatic hydrocarbons and persistent pollutants. The multivariable linear regression models are established with the Replacement Method (RM) technique, by searching the best 1-8 molecular descriptors on 26,795 available non-conformational structural variables. These ...
Source: Chemical Engineering Research and Design - December 13, 2019 Category: Chemistry Source Type: research

Simulation model of loading bin bottom by bulk material
In this study the cooperative plug-ins are utilised in an application dealing with the issues caused by Janssen forces/pressures of bulk material and deformation effects acting on the bottom of a bin. An examination of such issues includes observing a change in the position of a measuring plate due to the deformation of a force sensor placed at an outlet of an innovative prototype for measuring deformation effects. The experiment was evaluated and validation of discrete element method (DEM) simulation created; the force effects acting on the bottom of the bin were then transferred to a finite element method (FEM) analysis....
Source: Chemical Engineering Research and Design - December 13, 2019 Category: Chemistry Source Type: research

Biogas industry: Novel acid gas removal technology using a superacid solvent. Process design, unit specification and feasibility study compared with other existing technologies
Publication date: Available online 13 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Iran D. Charry Prada, Rodrigo Rivera-Tinoco, Chakib BouallouAbstractA novel purification technology for raw biogas streams is proposed and it is based on the use of a superacid solution within a bubble column reactor. The solvent is a mixture of sulfuric acid (H2SO4(aq), 95.0 wt.%) and acetic acid glacial (CH3COOH(l), ≥99.8 vol.%), both commercial grades. A mixture with a molar ratio of 9/1 for H2SO4(aq),/CH3COOH(l) respectively, leads to the interesting physical and chemical absorption properties ...
Source: Chemical Engineering Research and Design - December 13, 2019 Category: Chemistry Source Type: research

Agitating cylindrical particles in laminar liquid flow
Publication date: February 2020Source: Chemical Engineering Research and Design, Volume 154Author(s): J.J. DerksenAbstractThree-dimensional, time-dependent simulations of dense agitated solid-liquid suspensions involving particles of cylindrical shape in a Newtonian liquid have been performed. The liquid flow is resolved by the lattice-Boltzmann method at length scales finer than the size of the particles, which implies particle-resolved simulations. The flow solution includes the hydrodynamic forces and moments on each particle that are used to integrate their linear and rotational equations of motion. No-slip at the part...
Source: Chemical Engineering Research and Design - December 13, 2019 Category: Chemistry Source Type: research

Modeling of electric current assisted sintering: An extended fluid-like approach for the description of powders rheological behavior
Publication date: Available online 9 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Antonio Mario Locci, Roberto Orrù, Giacomo CaoAbstractA general theoretical framework for investigating the rheological behavior of powder undergoing electric current assisted consolidation is proposed in this work. The most relevant phenomena occurring during ECAS process are taken into account. Consolidating powders are assumed to behave as a viscous fluid. Specifically, powder viscosity is expressed by the Bird-Carreau-Yasuda’s model, which includes the power-law creep description typically adopted i...
Source: Chemical Engineering Research and Design - December 11, 2019 Category: Chemistry Source Type: research

Optimal integration of methanol-to-gasoline process with organic Rankine cycle
Publication date: Available online 9 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Siyao Liu, Jie He, Dexiang Lu, Jinsheng SunAbstractMethanol-to-gasoline (MTG) process is an important modern technology for fuel production. As a process featured in redundant heat, with reaction temperature sometimes up to 380℃, so far MTG heat integration has not been discussed in detail to make MTG an electricity generator. This paper, in this context, proposes a novel superstructure of the integration of methanol-to-gasoline (MTG) process with organic Rankine cycle (ORC) in the hope of higher energy efficiency...
Source: Chemical Engineering Research and Design - December 11, 2019 Category: Chemistry Source Type: research

Dispersion of praseodymium-doped zirconium silicate pigment in aqueous suspension by modified hydroxyl copolymer
Publication date: Available online 9 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Guanghua Huang, Zhidong Pan, Yanmin WangAbstractWater-based copolymer dispersants, i.e., sodium polyacrylic acid-co-2-acrylamide-2-methylpropanesulfonic acid-co-glycerol monomethacrylate (PASGS), were synthesized for dispersion of praseodymium-doped zirconium silicate pigment in aqueous suspension with polyacrylic acid-co-2-acrylamido-2-methylpropanesulfonic acid (PAS). Effects of different parameters on the dispersion behavior of colloidal particles were investigated via sedimentation tests. The samples were charac...
Source: Chemical Engineering Research and Design - December 11, 2019 Category: Chemistry Source Type: research

Mixed-Integer Dynamic Optimization of Conventional and Vapor Recompressed Batch Distillation for Economic and Environmental Objectives
Publication date: Available online 9 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Sidharth Sankar Parhi, Gade Pandu Rangaiah, Amiya K. JanaAbstractIn this contribution, a unique multi-objective mixed-integer dynamic optimization problem considering two conflicting objectives, namely, maximization of amount of product per dollar while minimizing CO2 emission is formulated and solved using the elitist non-dominated genetic algorithm for both conventional batch distillation (CBD) and vapor recompressed batch distillation (VRBD) operating at constant reflux mode. Here, selection of an optimal solutio...
Source: Chemical Engineering Research and Design - December 11, 2019 Category: Chemistry Source Type: research

Techno-economic evaluation of squalene recovery from oil deodorizer distillates
Publication date: Available online 9 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Alexandra Bouriakova, Pedro S.F. Mendes, Kathy Elst, Jeriffa De Clercq, Joris W. ThybautAbstractThe potential of squalene recovery from oil deodorizer distillates (ODD) via a combination of supercritical ethanol esterification, supercritical CO2-extraction and additional purification is assessed via detailed process simulations. The squalene yields and purity from olive, sunflower and soybean ODD were determined. The highest squalene yield and purity could be achieved starting from olive ODD (95 gsqualene kg-...
Source: Chemical Engineering Research and Design - December 11, 2019 Category: Chemistry Source Type: research

Cloud point extraction of La(III) by C13E10 non-ionic surfactant: Statistical refinement of experimental optimization by L9 Taguchi’s design
Publication date: January 2020Source: Chemical Engineering Research and Design, Volume 153Author(s): Zeyneb Sefrou, Nasr-Eddine BelkhoucheAbstractThe cloud point extraction experiments of La(III) ions using the C13E10 as non-ionic surfactant were carried out. The experimental optimization was realized by the classical method when optimizing one experimental factor at the time. The results showed that the La(III) ions were extracted at 61.77% and stripped from the loaded coacervate phase at 90.26% in one-stage with the nitric acid solution of 10−1 M. The most influent experimental factors such as: initial concentratio...
Source: Chemical Engineering Research and Design - December 11, 2019 Category: Chemistry Source Type: research

Investigation of gas–liquid dispersion and mass transfer performance of wide-viscosity-range impellers in water solutions of xanthan gum
Publication date: Available online 9 December 2019Source: Chemical Engineering Research and DesignAuthor(s): Baoqing Liu, Qing Xiao, Pengfei Gao, Bengt Sunden, Fangyi FanAbstractWide-viscosity-range impellers have extensive demands and applications in process industry. The gas–liquid dispersion and mass transfer characteristics of wide-viscosity-range impellers including Large-double-blade (LDB) impeller, Fullzone (FZ) impeller and Maxblend (MB) impeller in water solutions of xanthan gum were investigated experimentally and compared. The influences of gas flow rate, impeller speed and polymer concentration of liquid ...
Source: Chemical Engineering Research and Design - December 9, 2019 Category: Chemistry Source Type: research

Progression of Photocatalytic reactors and it’s comparison: A Review
This article reviews about all types of photocatalytic reactors and compares them with calculated five benchmarks: Apparent reaction rate constant (k), Space time yield (STY), Photocatalytic space time yield (PSTY), Specific removal rate (SRR), Electrical energy consumption (EEC). It is interpreted that in designing a photocatalytic reactor, four important aspects are to be considered: Throughput, Performance, Energy efficiency, Cost. This review article calculates the above said 5 benchmarks for 24 reactor designs and highlights the important parameters to build an effective photocatalytic reactor.Graphical abstract (Sour...
Source: Chemical Engineering Research and Design - December 7, 2019 Category: Chemistry Source Type: research

Inside Front Cover
Publication date: December 2019Source: Chemical Engineering Research and Design, Volume 152Author(s): (Source: Chemical Engineering Research and Design)
Source: Chemical Engineering Research and Design - December 7, 2019 Category: Chemistry Source Type: research

Contents
Publication date: December 2019Source: Chemical Engineering Research and Design, Volume 152Author(s): (Source: Chemical Engineering Research and Design)
Source: Chemical Engineering Research and Design - December 7, 2019 Category: Chemistry Source Type: research

Static and dynamic filtration of nickel and lead ions by adsorptive membrane induced by POP via layer by layer technique
We examined the ultrafiltration adsoprtive membrane manufacturing and its modification with the porous organic polymer (POP) adsorbent using layer-by-layer technology to removal of nickel and lead heavy metals in the present study. We used the one-step Friedel–Crafts reaction coupled with dimethyl acetal formaldehyde cross linker and iron chloride catalyst for the synthesis of the POP adsorbent. We also used an amino monomer to functionalize this type of polymer, which improved and modified the synthesized polymer for the better removal of heavy metals. The adsorbents and membranes prepared were analyzed and examined...
Source: Chemical Engineering Research and Design - December 2, 2019 Category: Chemistry Source Type: research

A Review on Novel Methodologies for Drug Nanoparticle Preparation: Microfluidic Approach
Publication date: Available online 30 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Preena Shrimal, Girirajsinh Jadeja, Sanjaykumar PatelAbstractThe intrinsic limitations of conventional dosages have facilitated the emergence of novel drug delivery methodologies. Drug nanonization and encapsulation in polymeric biomaterials offers a new platform to enhance therapeutic efficiency and patient compliance. The two most basic approaches for drug size reduction are top-down, bottom-up, or a combination of these methods. This review analyzes three widely investigated techniques (viz. spray drying, high p...
Source: Chemical Engineering Research and Design - December 2, 2019 Category: Chemistry Source Type: research

Model predictive control for continuous pharmaceutical feeding blending units
Publication date: Available online 30 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Selma Celikovic, Martin Kirchengast, Jakob Rehrl, Julia Kruisz, Stephan Sacher, Johannes Khinast, Martin HornAbstractThis paper outlines several control strategies for a feeding blending unit in a continuous pharmaceutical manufacturing setup, with the goal of damping feeder fluctuations by adjusting the blender speed. An advanced model predictive control concept and two standard concepts, PI- and model-based feed-forward control, are described and compared with respect to their performance in the simulation. The c...
Source: Chemical Engineering Research and Design - December 2, 2019 Category: Chemistry Source Type: research

Analysis of membrane unit performance in presence of wet CO2-containing mixtures
Publication date: Available online 30 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Leonardo Melone, Lidietta Giorno, Adele Brunetti, Giuseppe BarbieriAbstractMembrane gas separation is more and more gaining room of application in biogas upgrading to biomethane to be directly fed to pipelines. The water vapour contained in the biogas stream affects the separation performance of membranes; therefore, it is important to consider this aspect for the design of the separation stage.In this work, we developed performance maps taking into account the water vapour effect on the performance of a membrane g...
Source: Chemical Engineering Research and Design - December 2, 2019 Category: Chemistry Source Type: research

Volume averaging theory (VAT) based modeling for longitudinal mass dispersion in structured porous medium with porous particles
In this study, to investigate the mass transport characteristics in a structured porous medium with porous particles under an interfacial concentration discontinuity, a macroscopic solute transport equation is proposed based on the volume averaging theory. A typical three-dimensional geometry (a body center cubic arrangement of spheres) was chosen as the representative elementary volume. The corresponding closure problem was solved to obtain the longitudinal mass dispersion. Based on the numerical results, a new correlation of the longitudinal mass dispersion for a structured porous medium with porous particles is presente...
Source: Chemical Engineering Research and Design - December 2, 2019 Category: Chemistry Source Type: research

Negative temperature effect of complex reaction kinetics system of Fe and Al mineral impurities in liquid–solid process
Publication date: January 2020Source: Chemical Engineering Research and Design, Volume 153Author(s): Daijun Liu, Chengfa JiangAbstractDepletion of phosphate ore is one of the important resource crises in the world. The exploration of the transfer regularity of mineral impurities to liquid in the digestion process of phosphate rock is of great significance to the production of agricultural fertilizer. In this paper, the reaction kinetics experiments of iron and aluminum compounds in phosphate ore particles were carried out in the range of temperature 50–70 ℃ and phosphoric acid concentration 15–25%. Under...
Source: Chemical Engineering Research and Design - December 2, 2019 Category: Chemistry Source Type: research

Mathematical Modeling of Spray Impingement and Film Formation on Pharmaceutical Tablets during Coating
Publication date: Available online 27 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Charalampos Christodoulou, Eva Sorensen, Salvador García-Muñoz, Luca MazzeiAbstractThe application of coating films is an important step in the manufacture of pharmaceutical tablets. Understanding the phenomena taking place during coating spray application provides important information that can be used to reduce the number of defective tablets and select the optimal conditions for the coating process. In this work, we investigate spray impact and film spreading on a tablet while this passes through t...
Source: Chemical Engineering Research and Design - November 28, 2019 Category: Chemistry Source Type: research

Numerical simulation of bubble characteristics in bubble columns with different liquid viscosities and surface tensions using a CFD-PBM coupled model
In this study, the correction of surface tension and viscosity were used to determine the influence of different liquid properties on the hydrodynamic parameters of bubble columns. These were implemented based on the minimum energy model proposed by Li (Li et al., 1999; Li and Kwauk, 2003; Xu and Li, 1998), our previous work (Zhang et al., 2018), the drag model of atmospheric pressure from Xiao et al. (2017) and that from Yan et al. (2019). According to previous studies (Syed et al., 2017), because liquid properties significantly influence the bubble size distribution in a bubble column, the density correction term and gas...
Source: Chemical Engineering Research and Design - November 28, 2019 Category: Chemistry Source Type: research

Cloud point extraction of La(III) by C13E10 non-ionic surfactant. Statistical refinement of experimental optimization by L9 Taguchi’s Design
Publication date: Available online 26 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Zeyneb Sefrou, Nasr-Eddine BelkhoucheAbstractThe cloud point extraction experiments of La(III) ions using the C13E10 as non-ionic surfactant were carried out. The experimental optimization was realized by the classical method when optimizing one experimental factor at the time. The results showed that the La(III) ions were extracted at 61.77% and stripped from the loaded coacervate phase at 90.26% in one-stage with the nitric acid solution of 10-1 M. The most influent experimental factors such as : initial concentr...
Source: Chemical Engineering Research and Design - November 27, 2019 Category: Chemistry Source Type: research

Water impact of an optimal natural gas production and distribution system: An MILP model and the case-study of Mexico
This study presents a mathematical programming approach for evaluating the exploitation and distribution of shale gas from potential reserves at a national level, depending upon existing infrastructure and water availability. The study describes an MILP model that simultaneously integrates water management with the design and planning of the supply chain, from basins to distribution markets and fresh water supply from available watersheds. The model is applied to a case based on the potential exploitation of shale gas basins in Mexico. The parameters of the model are mostly taken from the databases of the country, processe...
Source: Chemical Engineering Research and Design - November 27, 2019 Category: Chemistry Source Type: research

Static Pressure Distribution Characteristics of Powders Stored in Silos
Publication date: Available online 27 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Yangyang Chen, Cai Liang, Xin Wang, Xiuqi Guo, Xiaoping Chen, Daoyin LiuAbstractStatic pressure distribution of the wall is essential to the optimal characteristics and discharge stability of the powder from products (bulk solids) in a silo. A Geocomp Shear Trac-II system was used to measure the flow properties of three different types of material, with an emphasis on the determining the best results in experiments using a special test silo with conical hopper dependent on the static pressure distribution of the si...
Source: Chemical Engineering Research and Design - November 27, 2019 Category: Chemistry Source Type: research

Mixing Indices Allow Scale-up of Stirred Tank Slurry Reactor Conditions for Equivalent Homogeneity
Publication date: Available online 25 November 2019Source: Chemical Engineering Research and DesignAuthor(s): S.T.L. Harrison, A. Kotsiopoulos, R. Stevenson, J.J. CilliersAbstractThe influence of reactor scale, impeller tip speed and specific power on the overall homogeneity (multi-phasic mixing) of two dimensionally similar stirred tanks of 50 mm and 220 mm internal diameter (ID) are compared using data collected from electrical resistance tomography for 5 and 15% v/v 600 – 800 μm particle suspensions. The data collected is used to quantify the suspension quality of the system by defining mix...
Source: Chemical Engineering Research and Design - November 26, 2019 Category: Chemistry Source Type: research

Quaternized graphene oxide modified PVA-QPEI membranes with excellent selectivity for alkali recovery through electrodialysis
Publication date: Available online 25 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Meng Li, Mengjie Sun, Wenya Liu, Xu Zhang, Cuiming Wu, Yonghui WuAbstractComposite anion exchanges membranes are prepared by incorporating quaternized graphene oxide (QGO) within poly(vinyl alcohol) (PVA) or the mixture of PVA and quaternized polyethyleneimine (QPEI), followed by cross-linking with formaldehyde. The PVA-QGO series of membranes have low ion exchange capacities (IECs) of 0.10–0.37 mmol/g and low water uptakes (WR) of 16.1%–22.0%, leading to high area resistances (>60 &Ome...
Source: Chemical Engineering Research and Design - November 26, 2019 Category: Chemistry Source Type: research

Fragmentation of Compact Polymer-Bridged Flocs in the Laminar Taylor Vortex Flow Regime: Population Balance and Breakage function
Publication date: Available online 26 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Pek-Ing Au, Yang Wang, Jishan Liu, Yee-Kwong LeongAbstractThe breakage or fragmentation kinetic function (FKF) of a given father size floc breaking to form two specific daughter size flocs cannot be measured experimentally. Indirectly it can be determined from the FKF model used to solve the dimensionless log-form population balance (PB) equation for floc fragmentation subjected to meeting three conditions: i) the computed and experimental particle size distribution function (PSDF) matched at all fragmentation time...
Source: Chemical Engineering Research and Design - November 26, 2019 Category: Chemistry Source Type: research

An insight into a di-chain surfactant adsorption onto sandstone minerals under different salinity-temperature conditions: Chemical EOR applications
Publication date: Available online 23 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Azza Hashim Abbas, Aghil Moslemizadeh, Wan Rosli Wan Sulaiman, Mohd Zaidi Jaafar, Augustine AgiAbstractSurfactant flooding, a chemical enhanced oil recovery (EOR) technique, mainly aims at mobilizing the trapped residual oil by lowering the oil-water interfacial tension. The success of a surfactant flooding operation is strongly affected by surfactant loss through its adsorption on reservoir minerals. Therefore, the adsorption behavior of surfactants is of great importance and needs to be carefully investigated. Th...
Source: Chemical Engineering Research and Design - November 25, 2019 Category: Chemistry Source Type: research

Integration of safety and health aspects in a simultaneous process and molecular design framework
Publication date: Available online 22 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Joon Yoon Ten, Mimi H. Hassim, Nishanth G. ChemmangattuvalappilAbstractThe aspects of safety and occupational health have been included as part of the design criteria in many process and molecular design problems. However, the main design objectives of these works are the molecular properties and process variables that offer the optimized process objective. Safety and health criteria are not strongly emphasized in these problems, since they are often introduced as design constraints or are not evaluated in an exten...
Source: Chemical Engineering Research and Design - November 23, 2019 Category: Chemistry Source Type: research

Review: fundamentals, applications and potentials of ultrasound-assisted drying
Publication date: Available online 22 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Yuwei Zhang, Nicolas AbatzoglouAbstractThis review aims at comprehensively presenting the state-of-the-art of Ultrasound-Assisted Drying (UAD).UAD represents a promising hybrid drying technique that enhances drying rate and energy efficiency while preserving the quality of the materials being dried. However, in accordance to literature, the limited knowledge and capacity of ultrasonic equipment still prevent this technology from being used in practical industrial applications.The first part briefly described the fu...
Source: Chemical Engineering Research and Design - November 23, 2019 Category: Chemistry Source Type: research

Validation of the pressure drop–flow rate relationship predicted by lattice Boltzmann simulations for immiscible liquid–liquid flows through SMX static mixers
Publication date: January 2020Source: Chemical Engineering Research and Design, Volume 153Author(s): Sébastien Leclaire, David Vidal, Louis Fradette, François BertrandAbstractSingle-phase and two-phase flows through SMX static mixers were modeled using the color-gradient multiphase lattice Boltzmann method and the results were compared with experimental data from the scientific literature. In particular, the relationship between pressure drop and flow rate was investigated for single-phase and immiscible liquid–liquid interfacial systems in laminar and transitional flow regimes. The hydrodynamic simulat...
Source: Chemical Engineering Research and Design - November 22, 2019 Category: Chemistry Source Type: research

Coaxial traveling-wave microwave reactors: Design challenges and solutions
Publication date: Available online 20 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Farnaz Eghbal Sarabi, Meisam Ghorbani, Andrzej Stankiewicz, Hakan NigarAbstractMicrowave chemistry applications have been investigated for more than three decades. Contrary to common cavity-based microwave applicators, the traveling-wave microwave reactor has the potential to enable the process scale-up, better coupling of microwave energy with microwave-susceptible catalysts, and consequently highly uniform microwave heating. In this work, the engineering challenges entailed with the design of a traveling-wave mic...
Source: Chemical Engineering Research and Design - November 21, 2019 Category: Chemistry Source Type: research

Deep CO2 removal using high pressure membrane contactors with low liquid-to-gas ratio
Publication date: Available online 20 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Zhe Phak Chan, Lin Li, Guodong Kang, Norfaizah Ab Manan, Yiming Cao, Tonghua WangAbstractMembrane contactor is a technology that intensifies conventional absorption column. However, liquid-to-gas ratios (L/G) of membrane contactor in existing reports are much higher compared to CO2 absorption column, which results in higher solvent circulation rate and higher consumption in heating energy. This makes the technology less attractive for deep CO2 removal. Direct reduction of liquid flow rate was not effective in lower...
Source: Chemical Engineering Research and Design - November 21, 2019 Category: Chemistry Source Type: research

Spinach-based photo-catalyst for selective plating on polyimide-based substrates for micro-patterning circuitry
Publication date: Available online 20 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Jose Marques-Hueso, Thomas D.A. Jones, David E. Watson, Assel Ryspayeva, Mohammadreza N. Esfahani, Matthew P. Shuttleworth, Russell A. Harris, Robert W. Kay, Marc P.Y. DesmulliezAbstractThis work demonstrates the suitability of spinach extract as a bio-catalyser for the photo-catalysed synthesis of silver nanoparticles on polyimide and polyetherimide, and their suitability as a seed-layer for the formation of conductive micro-track after plating. The study reveals that the extract can accelerate the reaction rates ...
Source: Chemical Engineering Research and Design - November 21, 2019 Category: Chemistry Source Type: research

Optimizing process economics and operational safety via economic MPC using barrier functions and recurrent neural network models
Publication date: December 2019Source: Chemical Engineering Research and Design, Volume 152Author(s): Zhe Wu, Panagiotis D. ChristofidesAbstractIn the present work, a control Lyapunov-barrier function (CLBF)-based economic model predictive control (EMPC) system is designed to optimize process economics, and ensure stability and operational safety simultaneously based on a prediction model using an ensemble of recurrent neural network (RNN) models. As accurate first-principles models are not available for many industrial processes, RNN models are utilized in this work to approximate the dynamics of a general class of nonlin...
Source: Chemical Engineering Research and Design - November 21, 2019 Category: Chemistry Source Type: research

Modelling of mass transport and insulin secretion of a membrane-based encapsulation device of pancreatic islets
Publication date: Available online 19 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Katarzyna Skrzypek, Efrem Curcio, Dimitrios StamatialisAbstractWidespread application of islet transplantation as a cure for type 1 Diabetes Mellitus patients is limited mainly due to the need for life-long immunosuppression associated with serious side effects. Immunoisolation by encapsulation of islets in semi-permeable membranes may overcome this issue as it allows for transplantation potentially obviating the need for immunosuppressive drug therapy.This work focuses on the development and validation of a model ...
Source: Chemical Engineering Research and Design - November 20, 2019 Category: Chemistry Source Type: research

Design of the reversible biphasic arrangement in the microfluidic chip reactor for asymmetric hydrogenation reactions
Publication date: Available online 20 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Petr Kluson, Petr Stavarek, Vera Penkavova, Hana Vychodilova, Stanislav Hejda, Magdalena Bendova, Marek DošekAbstractDesign of the reversible biphasic system for a practical use in asymmetric hydrogenation performed in a microfluidic chip reactor is reported. Methylacetoacetate (MAA) was transformed to (R)-methylhydroxybutyrate over optically pure (R)-Ru-BINAP as a model reaction. The study was an iteration towards the design, description and optimization of the temperature driven reversible biphasic system ...
Source: Chemical Engineering Research and Design - November 20, 2019 Category: Chemistry Source Type: research

Amorphous porous layered-Al2O3 derived from AlFu MOFs as an adsorbent for removing fluorine ions in industrial ZnSO4 solution
Publication date: Available online 18 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Kai Yang, Yifan Li, Zejun Zhao, Zhongliang Tian, Yanqing LaiAbstractThe amorphous porous layered-Al2O3 derived from aluminium fumarate metal-organic frameworks (AlFu MOFs) by roasting at 773K under air has been applied to remove fluorine ions from industrial ZnSO4 solution. The amorphous porous layered-Al2O3 was characterized by XRD, SEM and BET. The adsorption experiments were conducted under different conditions, including adsorbent dosage, initial pH, adsorption temperature and adsorption time. And the process o...
Source: Chemical Engineering Research and Design - November 19, 2019 Category: Chemistry Source Type: research

The formation of satellite droplets in micro-devices due to the rupture of neck filament
Publication date: Available online 18 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Xiaoxi Yu, Yining Wu, Yuan Li, Zhi Yang, Youguang MaAbstractFormation of satellite droplets during drop formation or breakup leads to an increment of polydispersity of emulsion and runs contrary to the original intention of microfluidics. Thus, more attention is needed to shed light on the mechanism of satellite droplets formation to alleviate polydispersity. In this work, we studied the satellite droplet formation process in microfluidic flow-focusing junction and T-junction with capillary number Ca =μcuc/&sigm...
Source: Chemical Engineering Research and Design - November 19, 2019 Category: Chemistry Source Type: research

Using design spaces for more accurate cost estimation during early engineering phases
Publication date: Available online 16 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Christian Post, Niklas Wentingmann, Christian Bramsiepe, Gerhard SchembeckerAbstractThe main benefits expected from module-based plant design are shortened planning periods and increased planning as well as cost estimation accuracy during early engineering phases. Most of the existing approaches require equipment module databases. However, overall equipment module databases do still not yet exist. Even though these databases will be available, they will most likely not contain operable equipment modules for any pro...
Source: Chemical Engineering Research and Design - November 16, 2019 Category: Chemistry Source Type: research

Use of pressure signal analysis to characterise counter-current two-phase flow regimes in annuli
Publication date: Available online 16 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Benjamin Wu, Ayrton Soares Ribeiro, Mahshid Firouzi, Thomas E. Rufford, Brian TowlerAbstractWe characterised different flow regimes and their transition through an objective and quantitative assessment of flow behaviour by applying four signal process techniques (autocorrelation, power spectral density (PSD), Shannon entropy, and permutation entropy) onto pressure signals of counter-current two-phase flows in a 170 × 70 mm concentric vertical annulus. Differential pressure values were measured ...
Source: Chemical Engineering Research and Design - November 16, 2019 Category: Chemistry Source Type: research

On coherent structures in gas–solid fluidization
Publication date: January 2020Source: Chemical Engineering Research and Design, Volume 153Author(s): Musango Lungu, Haotong Wang, Jingyuan Sun, Jingdai Wang, Yongrong Yang, Fengqiu Chen, John SiameAbstractIn this work, experimental data from the novel high speed particle image velocimetry (HSPIV) measurements and pressure fluctuations complemented by numerical predictions from TFM simulations are processed using advanced signal processing protocols to identify and characterize coherent structures in a gas–solid fluidized bed with Geldart D particles. The time-frequency properties of the bed dynamics were studied usin...
Source: Chemical Engineering Research and Design - November 16, 2019 Category: Chemistry Source Type: research

Simulation of non-Newtonian fluid seepage into porous media stacked by carbon fibers using micro-scale reconstruction model
This study is helpful to understand the law of fluid transport in porous media and provides theoretical basis for the preparation of Cf/SiC composites.Graphical Abstract (Source: Chemical Engineering Research and Design)
Source: Chemical Engineering Research and Design - November 16, 2019 Category: Chemistry Source Type: research