Showing papers in "Chemical Engineering Science in 2021"

TL;DR: In this article, a review mainly focuses on various utilization approaches and their mechanisms for CO2 mitigation, including hydrogenation, esterification, methanation, reforming, and reverse water-gas shift (RWGS) reactions, their mechanisms and their current status along with future perspectives were comprehensively discussed.

TL;DR: In this paper, the authors provide an up-to-date summary on the DRM process, including aspects of composite (bimetallic and trimetallic) catalysts and also the influence of doping metal on the catalysts.

TL;DR: In this article, the oxygen vacancy content in the TiO2 samples and the relationship between oxygen vacancy and photocatalytic performance have been studied by comprehensive analyses, and the results are significant for the design of high-performance photocatalysis materials in the field of solar energy conversion.

TL;DR: Compartment models to describe fluid flow in real reactors are reviewed, progressive modeling of chromatographic processes discussed in some detail and smart RTD and future challenges are discussed.

TL;DR: In this article, the authors present a review of the recent progress on flow and mass transfer of two-phase systems in microchannels, in a multi-scale view from local mechanism to global behavior.

TL;DR: In this article, the authors provide an up-to-date summary on the DRM over ceria-based catalysts, including aspects of the catalysts and reaction mechanism, deactivation, and regeneration studies.

TL;DR: In this paper, a comprehensive review of photocatalytic CO2 conversion into useful solar fuels starting from fundamentals and important factors influencing CO2 reduction is presented. And the review systematically highlights the useful approaches to modulate the major sequential steps in photocatalysis involving visible light absorption and isolation of photocarriers via doping, incorporation of co-catalyst, defect engineering and heterostructure formation.

TL;DR: In this article, the excellent characteristics of micro reaction processes, including high safety, narrow residence time distribution, rapid reactant mixing, high mass and heat transfer rates and simple scale-up strategy, are embodied in the recent research progress of epoxide synthesis and utilization.

TL;DR: In this paper, a CFD model was developed for the biomass gasification process in a downdraft fixed-bed gasifier, and several operating parameters, including the velocity and preheating temperature of the inlet air/steam mixture, steam to air ratio (S/A), and biomass moisture content (MC), were investigated to achieve the maximum syngas yield and conversion efficiency.

TL;DR: In this paper, a comprehensive literature review on the estimation of the dissipation rate of turbulent kinetic energy is presented to assess the current state-of-the-art available in this area.

TL;DR: In this paper, a systematic ionic liquid screening approach for acid gas removal processes was developed by taking into account a wide range of process performance-determining factors, including the process thermal efficiency (absorption enthalpy and sensible heat) and absorption-desorption working capacity.

TL;DR: In this paper, a comprehensive literature survey was performed to provide an up-to-date database comprising 10,116 CO2 solubility data and 463 H2 data measured in a large number of ionic liquids at various temperatures and pressures.

TL;DR: In this article, the multiphase flow and thermochemical behaviors of char combustion in a bubbling fluidized bed (BFB) are simulated using CFD-DEM approach featuring particle size polydispersity.

TL;DR: The proposed Fractal-based DKPCA (FDKPCA) integrates the two strategies to overcome SPCA/D PCA/DKPCA shortcomings, FDim allows verifying the degree of fitting and ensures optimal dimensionality reduction.

TL;DR: In this paper, a smoothed volume distribution model (SVDM) is developed to simulate the migration of fine powders in suspension flow through a solid packed bed, where the porosity of coarse solids is calculated by a smooth particle volume distribution.

TL;DR: In this article, the rod-like SBA-15 was transformed into fibrous type SBA15 (F-SBA15), which was catalytically evaluated in CO2 methanation.

TL;DR: The need to improve the performance of existing electrolyzers or the development of new technologies has attracted the attention of the scientific community Commercial and open-source codes are very valuable tools in pursuing such goals as discussed by the authors.

TL;DR: In this article, the influence of promoters (Zr, Ce, La, and Mo) on the structural properties and low temperature activity features of Ni-Al2O3 catalyst has been addressed in CO2 methanation reaction.

TL;DR: In this article, previous studies related to the production of bio-cement using MICP and factors that affect the process, namely bacteria, pH, cementation solution, injection, and temperature are thoroughly reviewed.

TL;DR: In this article, a novel N-doped porous graphitized biochar (NPGBC) with a large specific surface area (950.52 m2/g), partly graphitized structure, and high nitrogen doping (3.61%) was prepared by co-carbonization of alfalfa, ferric chloride (FeCl3), and potassium hydroxide (KOH).

TL;DR: In this article, the role of heat transfer in solvent extraction was investigated, in particular, how the heat transfer properties of the solid and the heating method (conventional heating and microwave heating) drive this mass transfer process.

TL;DR: In this article, an alternative study in foam formulation has been reported, where instead of preparing the foam at the surface and injecting it down the oil well, into the subsurface, the foam can be formed "in situ" by saturating the porous media downhole by foaming agents.

TL;DR: The role of the hydrophilic LTA zeolite membrane is to remove H2O from the reaction medium, reducing therefore the thermodynamic limitations of methanol synthesis and dehydration stages as mentioned in this paper.

TL;DR: In this article, 0D carbonized polymer dots are evenly loaded on ultrathin 2D Bi12O17Cl2 nanosheets, which construct the Z-scheme carrier migration system with effectively increased photocatalytic CO2 conversion to CO.

TL;DR: The method provides insights into the problem while providing the minimum resource target, and is demonstrated by several industrial case studies encompassing problems with a fresh and impure resource.

TL;DR: In this paper, a combination of Ag nanoparticles and gC3N4/ZnO nanorods heterojunction has been shown to significantly enhance photocatalytic CO2 reduction efficiency to form the acetone product.

TL;DR: A novel microscale device for continuous flow separation of two types of CTC from blood cells and it is demonstrated that the separation efficiency reaches 100% over a range of Reynolds numbers from 90 to 110 (throughput range of 113–139 ml/h).

TL;DR: The results showed that the deep learning method used in this work is able to detect most of the bubbles present in the high-speed camera images, even in dense bubbly flow configurations.

TL;DR: This study demonstrates through a cascading analysis that the extrapolation of the ANN model to large grid sizes works satisfactorily, and develops a general ANN model for drag correction that can be used for a range of gas and particle characteristics.

TL;DR: In this paper, a facile method for synthesizing bimetallic Pd-Fe alloy nanoparticles catalysts anchored on N doped carbon (NC) functionalized fibrous aluminium silicate fibers (ASFs) was proposed.