Article
Engineering, Chemical
Pengyu Shi, Anna-Elisabeth Sommer, Hannes Rox, Kerstin Eckert, Roland Rzehak
Summary: Simulations of solid-liquid flow on industrial scales using the Euler-Euler / RANS approach were validated by comparing the predictions to recent experimental data. The closure models utilized in the simulations were reviewed and found to reasonably reproduce the experimental results. However, the measurements showed an effect of particle modulation on liquid phase turbulence. Different particle induced turbulence models were assessed, indicating a reduction in predicted fluctuations but with varying effects on turbulence suppression and augmentation.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
A-E Sommer, H. Rox, P. Shi, K. Eckert, R. Rzehak
Summary: This study conducted solid-liquid two-phase flow experiments in stirred tanks and accumulated a CFD-grade database, including experimental data for single-phase flows. The experimental data covers a range of density ratios, particle diameters, solid volume fractions and impeller rotation speeds.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Engineering, Environmental
Qi Chang, Shengbin Di, Ji Xu, Wei Ge
Summary: Particle-resolved direct numerical simulation was conducted on a 4-baffled cylindrical stirred tank with a 6-pitched blade turbine-downflow (PBTD) impeller for the first time. The study revealed the significant impact of particle inertia and turbulence intensity on the system operation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Francesco Maluta, Federico Alberini, Alessandro Paglianti, Giuseppina Montante
Summary: In this work, the authors present original data on bubble size distribution in a gas-liquid stirred tank obtained through a combination of experimental and computational methods. The aim is to contribute to the development of fully predictive methods for the design and scale-up of chemical and biochemical gas-liquid reactors. The paper discusses the variables that affect mass transfer in industrial aerobic fermentations, with a special focus on bubble size distribution, gassed power consumption, and gas cavities. The latest developments of Two Fluid and Population Balance models for obtaining fully predictive results on gas-liquid mixing in stirred tanks are also discussed. The results highlight the importance of accurately predicting bubble size in the impeller zone for reliable hydrodynamics results in aerated stirred tanks.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Chemical
Mengke Guo, Zhuotai Jia, Shuaifeng Zhang, Bo Kong, Minghui Xie, Qinghua Zhang, Chao Yang
Summary: The study focuses on the application of V-shaped punched baffle in gas-liquid systems and compares its performance with standard baffles. The results indicate that V-shaped baffles can enhance fluid mixing and improve gas dispersion and turbulence, especially VSPB-2.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Engineering, Chemical
Xiaotong Luo, Jiachuan Yu, Bo Wang, Jingtao Wang
Summary: This paper investigates the heat transfer and hydrodynamics of particle flows in stirred tanks using a coupled CFD-DEM method. It validates the numerical method by comparing results to experimental data and finds that decreasing the blade height and equipping baffles can enhance heat transfer in stirred tanks. The study provides an effective method for analyzing multiphase flows involving heat transfers in complex systems.
Article
Engineering, Chemical
Kirill Mikhaylov, Stelios Rigopoulos, George Papadakis
Summary: The study combines reduced order modeling and system identification to reconstruct the temporal evolution of large-scale vortical structures behind the blades of a Rushton impeller. The results demonstrate that even using the velocity time signal from a single sensor point, the first pair of modes can be reconstructed well. Increasing the number of sensor points improves accuracy and stability, leading to better reconstruction of the second pair of POD modes. The estimator derived at Reynolds number 600 shows robustness when applied to flows at Reynolds numbers 500 and 700.
Article
Mechanics
Joseph Amponsah, Pius Ohene Darko
Summary: This study investigates the radial velocity profiles near the impeller tip in a baffled stirred tank through experimental measurements and computational fluid dynamics (CFD) simulations. The results show that double turbine impellers generate localized turbulence, while pitched blade turbines with down-pumping produce high-intensity turbulence zones throughout the tank. The CFD simulations align closely with experimental data and provide further insight into flow patterns.
Article
Engineering, Chemical
Tingting Lu, Kang Li, Fengqin Liu, Xin Gao, Yuanzheng Yue, Hao Shen, Hongliang Zhao
Summary: Slurry electrolysis (SE), a hydrometallurgical process, can be applied to extract metals from polymetallic complex mines. Numerical investigations supported by experiments revealed the influences of particle size (d), impeller diameter (D), and liquid level (H) on solid-liquid suspension characteristics. The results showed that particle size significantly affected homogeneity, impeller diameter affected liquid flow, and liquid level affected both homogeneity and power consumption.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Chemical
Inci Ayranci, Suzanne M. Kresta
Summary: This study quantifies turbulence above the cloud using LDV measurements, finding significant differences in fluctuating values at different heights within the cloud, with turbulence decaying as height increases.
Article
Mechanics
Brendan Keith, Ustim Khristenko, Barbara Wohlmuth
Summary: This paper introduces a class of turbulence models based on fractional partial differential equations with stochastic loads, where solutions are incompressible velocity fields with Gaussian distributions. Interaction between turbulence and solid walls is achieved through various boundary conditions, allowing flexibility in simulating near-wall statistics. Two simple physical applications are emphasized, including the reproduction of fully developed shear-free and uniform shear boundary layer turbulence, with the former validated using experimental data. Additionally, the paper discusses the generation of inhomogeneous synthetic turbulence inlet boundary conditions, inspired by contemporary numerical wind tunnel simulations, as well as calibration of model parameters and efficient numerical methods.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Chemistry, Multidisciplinary
Jian Peng, Wei Sun, Haisheng Han, Le Xie, Yao Xiao
Summary: In this study, computational fluid dynamics (CFD) modeling was used to investigate liquid-liquid mixing behavior, while the population balance model (PBM) was used to characterize droplet size distribution. The study found that impeller position, stirring speed, and the number of impellers significantly affect mixing efficiency.
Article
Engineering, Chemical
Cuicui Yin, Jiazhen He, Yongnan Xiong, Zhibo Zhang, Xing Luo, Yao Shu, Danfeng Long, Kaihong Zheng
Summary: The performance of the Rotor-Stator agitator for solid suspension in stirred tank was investigated through CFD modeling. It was found that adding a stator structure outside the rotor can optimize the flow pattern, thereby improving the mixing uniformity and liquid level stability. The homogeneity and liquid level stability attained by the Rotor-Stator agitator were better than those for the A200 and the Rushton.
Article
Mechanics
Francesco Maluta, Antonio Buffo, Daniele Marchisio, Giuseppina Montante, Alessandro Paglianti, Marco Vanni
Summary: This work investigates the capabilities of Two Fluid Model simulations coupled with a Population Balance Model in predicting the turbulent kinetic energy dissipation rate and the droplet size distribution in a dilute liquid-liquid stirred tank. The study confirms the spatial discretization requirements for achieving reliable predictions of turbulent variables, and proposes methods to adjust parameters for more accurate predictions.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Engineering, Chemical
Zhuotai Jia, Shuaifeng Zhang, Kefeng Fang, Bo Kong, Minghui Xie, Qinghua Zhang, Chao Yang
Summary: This study investigated the flow characteristics in a stirred tank using the SBES model, and the results showed that the model accurately predicted velocity and turbulence quantities, and successfully captured the features of trailing vortices.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Chemistry, Multidisciplinary
Xuecheng Guo, Shiying Fan, Xinyong Li, Qidong Zhao, Jinsuo Gao, Moses O. Tade, Shaomin Liu
Summary: This study reports a new method to construct a three-dimensional ordered hierarchical porous carbon aerogel by directional freeze-casting and metal-organic framework-derived synergistic strategy. The as-prepared aerogel, used as a freestanding flexible electrode, shows high efficiency in ethylene production. The higher Faradaic efficiency and ethylene selectivity are attributed to the synergistic effects of directional ordered channels and hierarchical pore structures.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Chencheng Cao, Yijun Zhong, Kimal Chandula Wasalathilake, Moses O. Tade, Xiaomin Xu, Hesamoddin Rabiee, Md Roknuzzaman, Rajib Rahman, Zongping Shao
Summary: Solid-state batteries with garnet electrolytes have high stability and energy density but suffer from poor electrolyte-anode contact. Adding multifunctional Li0.3La0.5TiO3 to the lithium anode effectively improves interface stability, decreases resistance, and prevents dendrite formation, leading to enhanced performance and cycling stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Review
Engineering, Chemical
Oluwaseun Ruth Alara, Nour Hamid Abdurahman, Moses Oludayo Tade, Hassan Alsaggaf Ali, Kehinde Temitope Alao
Summary: Effectively breaking emulsions in the petroleum industry is crucial for minimizing environmental issues and ensuring smooth operation of transportation, refining, and treatment facilities. Previous and current studies have demonstrated that combining different separation modes and demulsification modeling can enhance the efficiency of emulsion breaking.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Engineering, Chemical
Oluwaseun Ruth Alara, Nour Hamid Abdurahman, Moses Oludayo Tade, Hassan Alsaggaf Ali
Summary: This study examined the extraction kinetics of phenolic compounds from Phyllanthus niruri leaves using the microwave-enhanced method. The effects of microwave power, sample-to-solvent ratio, and extraction temperature on the second-order model were investigated. The study also determined the effective diffusivity and functional groups in the leaf extract of P. niruri.
CHEMICAL ENGINEERING COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Penglei Wang, Shiying Fan, Xinyong Li, Jing Wang, Zhiyuan Liu, Zhaodong Niu, Moses O. Tade, Shaomin Liu
Summary: This study demonstrates the design and synthesis of atomically dispersed Pd on ZnIn2S4, which exhibits remarkable performance in photocatalytic hydrogen production and oxidation of organic substances. By modulating charge polarization and active sites, Pd single atoms promote spatial charge separation and decrease reaction energy barriers, achieving efficient photocatalytic reactions.
Article
Chemistry, Physical
Zhifan Yin, Shiying Fan, Xinyong Li, Moses O. Tade, Shaomin Liu
Summary: The hierarchical CaFe2O4 core-shell hollow microspheres with high surface area and strong visible-light absorption capability were successfully fabricated by a solvothermal approach followed by heat treatment. The formation mechanism of the hollow structure was proposed based on characterization results. The CaFe2O4 core-shell hollow microspheres exhibited a degradation ratio of 82.0% for 1,2-dichlorobenzene under visible light irradiation. The catalytic oxidation process and degradation mechanism on the CaFe2O4 surface were clarified using in situ Fourier transform infrared technology.
MATERIALS TODAY ENERGY
(2022)
Article
Chemistry, Physical
Zhaodong Niu, Shiying Fan, Xinyong Li, Penglei Wang, Moses O. Tade, Shaomin Liu
Summary: Electrochemical NITRR catalyzed by surface oxygen-modified copper nanoparticles produces NH3 efficiently. Rational design can enhance the efficiency of NITRR.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Yijun Zhong, Chencheng Cao, Moses Oludayo Tade, Zongping Shao
Summary: In this study, a composite anode with metallic lithium, ionically conductive Li3N, and electronically conductive components was developed to decrease the over-potentials in solid-state lithium batteries. The dual conductive phases showed improved electrochemical stability and cycling performance, making them a promising candidate for future Li-containing composite anodes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Xinyang Wang, Xinyong Li, Shiying Fan, Penglei Wang, Yu Qin, Moses O. Tade, Shaomin Liu
Summary: Ag-doped Co3O4 porous nanosheets showed superior catalytic activity in the reduction of NO with CO, with 0.02AgCo catalyst exhibiting the best performance. The enhanced catalytic activity of xAgCo could be attributed to the optimized CO adsorption, promoted NO dissociation, and the formation of *NCO species.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Meichun Qin, Shiying Fan, Xinyong Li, Moses O. Tade, Shaomin Liu
Summary: Single atom Au surface derived NiMn2O4 spinel synergetic composites were prepared and applied in electroreductive self-coupling of benzaldehyde, enhancing the yield and selectivity of dibenzyl ether. The study provides a prospective strategy for biomass derivative upgrading.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Liang Wang, Shiying Fan, Moses O. Tade, Shaomin Liu, Xinyong Li
Summary: Capturing CO2 from flowing flue gases through adsorption technology is crucial for reducing CO2 emission to the atmosphere. In this study, nitrogen-doped carbon aerogels (NCAs) with high specific surface area and interconnected porous structures containing abundant pyridinic nitrogen and pyrrolic nitrogen were synthesized. The NCA-1-2 sample exhibited high CO2 adsorption capacity and CO2/N2 selectivity, making it a promising material for CO2 capture and separation.
Article
Nanoscience & Nanotechnology
Guoqiang Gan, Fengquan Xu, Xinyong Li, Shiying Fan, Chunpeng Bai, Qidong Zhao, Moses O. Tade, Shaomin Liu, Wenjun Zhang
Summary: The influence of crystal phase on the electrocatalytic performance and active sites of CuFe2O4 spinel for the electrochemical dechlorination of 1,2-dichloroethane is studied. A higher activity and ethylene selectivity are observed for the cubic phase compared to the tetragonal phase, indicating the significant enhancement of electrocatalytic performance by the cubic crystal structure. The octahedral Fe atom on the surface of cubic CuFe2O4(311) is identified as the active site responsible for ethylene production with an energy barrier of 0.40 eV. This work highlights the importance of crystal phase engineering for optimizing electrocatalytic performance and provides an efficient strategy for the development of advanced electrocatalysts.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Zhiyuan Liu, Shiying Fan, Xinyong Li, Zhaodong Niu, Jing Wang, Chunpeng Bai, Jun Duan, Moses O. Tade, Shaomin Liu
Summary: We demonstrate a composite photocatalyst for nitric oxide conversion with a Cu-Fe alloy, graphitic carbon nitride (g-C3N4), and ZnIn2S4. The superior photocatalytic performance of 6.45-fold that of g-C3N4 was confirmed. The delay effect on charge recombination was observed through time-resolved photoluminescence, and heterojunction establishment was attributed to the hole-trapping ability of ZnIn2S4. The combined effects of the Cu-Fe alloy were confirmed by NO-specific adsorption and conversion experiments, and the active species involved were examined via electron spin resonance. Density functional theory calculations revealed the molecular mechanisms of photocatalytic conversion of NO to NO3-. Therefore, g-C3N4|ZnIn2S4|CuFe has potential for sustainable and efficient pollutant conversion.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Yasir Arafat, Muhammad Rizwan Azhar, Yijun Zhong, Ryan O'Hayre, Moses O. Tade, Zongping Shao
Summary: This study presents a method of in situ exsolution of CoFe nanoalloys on the surface of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) perovskite under a N-2 atmosphere, facilitated by organic ligands. The resulting BSCF/CoFe electrode exhibits enhanced electrochemical bi-functional performance, making it a promising candidate for air electrodes in zinc-air batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Yu Qin, Shiying Fan, Jinsuo Gao, Moses O. Tade, Shaomin Liu, Xinyong Li
Summary: Cu-doped CoMn2O4 catalysts showed excellent catalytic performance in NO reduction by CO, with Cu0.3Co0.7Mn2O4 achieving 100% NO conversion and 80% N2 selectivity at 250 degrees C. Structural analysis revealed that the introduced Cu replaces some Co in tetrahedral coordination, resulting in a strong synergistic effect between different metals.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Bingyao Wang, Tianyi Cai, Xiaoshu Cai, Wu Zhou, Zeqi Liu
Summary: The size and morphology of nanoparticles significantly impact their performance. Current methods, such as electron microscopy or atomic force microscopy, have limitations in sample preparation, processing time, and quantitative characterization. Therefore, it is crucial to develop a fast, accurate, and statistical method for measuring nanoparticle size and morphology. In this study, a new method called polarized imaging dynamic light scattering (PIDLS) is proposed, which irradiates nanoparticles with a vertical linearly polarized laser beam and utilizes a polarization camera to collect dynamic light scattering images at different polarization directions. The method effectively determines particle size, morphology, and sphericity based on depolarization patterns and degree of linear polarization. PIDLS also enables simultaneous measurement of particle size and morphology distributions, allowing for the evaluation of particle uniformity. The effectiveness of PIDLS is validated with the measurement of five types of industrial titanium dioxide.
Article
Engineering, Chemical
Qingye Meng, Shuangling Zhong, Jingfei Wang, Zhenqian Zhang, Yan Gao, Xuejun Cui
Summary: In this study, a non-toxic natural polysaccharide, sodium alginate (SA), was developed for targeted delivery of curcumin (CUR) in tumor therapy. The CUR was coated in microcapsules using a quick, efficient, and environment-friendly sonochemical method. The microcapsules showed similar toxicity to free curcumin in anti-tumour evaluation and exhibited effective antibacterial properties. This research has the potential to provide a low-cost tumor targeting vector and can be promoted for clinical application.
Article
Engineering, Chemical
Christin Velten, Mirko Ebert, Christian Lessig, Katharina Zaehringer
Summary: Ray tracing Particle Image Velocimetry (RT-PIV) is an optical technique that corrects for distortions in velocity measurements caused by transparent geometries in challenging optical systems. This study focuses on the challenges and implications of using RT-PIV in a body centred cubic (bcc) sphere packing with gaseous flow, where transparent glass balls are used for optical access. The results demonstrate the effectiveness of the method in reconstructing velocity fields behind transparent spheres.
Article
Engineering, Chemical
Yanhao Ye, Ji Xu, Wei Ge
Summary: By modeling neighboring particles as a single coarse-grained particle, the discrete particle method (DPM) can now simulate industrial-scale particle-fluid systems. However, there is still a lack of a systematic approach to determine the properties and interaction models of these coarse-grained particles, which affects the predictability of the method. In this study, kernel functions for modeling the coarse-grained particles are constructed based on the analysis of collisions between predefined particle groups, and the model parameters are determined by equating the statistical properties of the coarse-grained particles to those of the real particles. This approach has been effective in simulating the homogeneous cooling of granular gas and experimental fluidized beds.
Article
Engineering, Chemical
Boris I. Kharisov, Oxana V. Kharissova, Lucy T. Gonzalez, Yolanda Pena Mendez, Igor E. Uflyand, Idalia Gomez de la Fuente
Summary: Hydroxyapatite (HA) composites with carbon allotropes and nanocarbons are rapidly developing in materials chemistry, especially for medical applications. These composites can be synthesized using various methods and exhibit biocompatibility and hemocompatibility, making them suitable for bone regeneration and wastewater treatment.
Article
Engineering, Chemical
Xing Li, Qun Chen, Zhaozhao Liu, Cheng Zhou, Chen Wang, Chen Chen
Summary: The particle size distribution (PSD) curve is an important expression of soil properties. However, existing characteristic parameters can only represent some points of the curve and fail to capture all the information. This paper introduces a new fraction characteristic parameter based on grading entropy and proposes a refined presentation method for the PSD curve. The new method not only represents the differences in curve width more accurately but also has higher discrimination ability. The application of this method in describing deposit distribution and predicting soil hydraulic conductivity is discussed. The research results can provide reference for the refined representation of PSD curves.
Article
Engineering, Chemical
Qingjin Zhang, Liangliang Fu, Guangwen Xu, Dingrong Bai
Summary: This study comprehensively analyzes the temperature effect on the minimum fluidization velocity (Umf) in fluidized-bed reactors. The analysis reveals the influence of temperature on Umf is determined by the relative importance of hydrodynamic forces and interparticle forces, which result in changes in gas properties, bed voidage, and physiochemical characteristics of particles. An equation is derived to predict the temperature influences on Umf under broad temperature conditions.
Article
Engineering, Chemical
Josephine Oppotsch, Matthias Steinke, Miriam Fritsch, Fritz -Herbert Heinsius, Thomas Held, Nikoline Hilse, Viktor Scherer, Ulrich Wiedner
Summary: This work is the second part of a simulation study on processing densely packed and moving granular assemblies using PEPT. A cost-effective PET-like detector system is being developed to overcome the high cost of PET scanners commonly used for PEPT. Monte Carlo simulations and Geant4 software were used to study the spatial resolution of different scenarios, and it was found that oversampling and iteration improved the resolution significantly.
Article
Engineering, Chemical
Lian Duan, Zhixun Xia, Yunchao Feng, Binbin Chen, Likun Ma, Jianxin Hu
Summary: In this study, boron-magnesium agglomerates with varying mass ratios were prepared and the combustion process of these agglomerates under different oxygen-rich concentrations were investigated. The results showed that when the mass fraction of magnesium powder in boron-magnesium agglomerates exceeded a certain threshold, a transient flameout process occurred. This process is affected by the magnesium content of the agglomerate and the oxygen concentration in the ambient atmosphere.
Article
Engineering, Chemical
Lixia Hou, Chunxiao Qu, Min Su, Zhihan Liang, Qi Hao
Summary: This study investigates the impact of polymer modified Fe3O4 nanoparticles on lysozyme (Lys) crystallization under different conditions, using functionalized Fe3O4 magnetic nanoparticles (Polymer C@Fe3O4) as nucleation agents. The findings show that the surface charge density of Polymer C@Fe3O4 is highest at a modification mass ratio of 8:3 for Fe3O4 to Polymer C. By adding 15% of the PolymerC@Fe3O4 prepared from Fe3O4 with an average particle size of 150 nm, magnetic core lysozyme (M-Lys) crystals with an average particle size of 11.08 mm, narrow size distribution, and regular morphology were obtained with a yield of 82.42% within 60 min.
Article
Engineering, Chemical
Fangling Hu, Liangliang Fu, Qingjin Zhang, Guangwen Xu, Dingrong Bai
Summary: This study proposes a method for synthesizing high-quality forsterite using abundant boron mud waste through high-temperature thermochemical reactions. The reaction can be completed rapidly at low temperatures due to the high reactivity of fine raw powder materials. The synthesized forsterite products exhibit high densification, well-developed grains, and an activation energy of 165.5 kJ/mol in the temperature range of 1100-1500°C. This study provides a low-cost method for producing forsterite and an efficient solution for treating solid waste.
Article
Engineering, Chemical
Yi Liu, Yunyan Guo, Rui Zhu, Jinqiang Zhou, Zhengxu Lin, Kai Han, Chongwei An, Jingyu Wang, Bidong Wu
Summary: Improved controllability and energy density of ignition agents are important for the development of energetic composite materials. In this study, HNS/CL-20 composite microspheres were prepared using droplet microfluidics and emulsification techniques with GAP as the binder. The microspheres exhibited higher sphericity and particle size uniformity compared to raw HNS, and retained the crystal structure of both HNS and CL-20. The microspheres also showed higher apparent activation energy, better safety performance, and good dispersibility, demonstrating excellent ignition performance and significant energy release effects.
Article
Engineering, Chemical
Max Kriegeskorte, Nikoline Hilse, Phil Spatz, Viktor Scherer
Summary: This study experimentally analyzed the particle mechanics of a single floor in a multiple hearth furnace. The results showed that increasing the blade angle led to an increase in the particle free surface area. The frequency distribution of the mean distance among particles provided information about the morphology of the particle bulk.
Article
Engineering, Chemical
Min Cai, Shuangzhu Kong, Sheng Chen, Mengxi Liu, Chunxi Lu
Summary: Reasonable reactor design is crucial for increasing the C2 yield in the oxidative coupling of methane (OCM). This study focused on large-scale fluidized bed reactors and conducted experiments and simulations to investigate their hydrodynamics and reaction performance. The results showed that the consecutive reactions of ethylene were severe in the bubbling fluidized bed (BFB) reactor due to gas back-mixing, high solids holdup, and non-uniform solids distribution, while they were negligible in the riser reactor. Both reactors achieved isothermal operation for the OCM process, with the riser reactor showing higher C2 selectivity and yield compared to the BFB reactor. This study provides valuable information for OCM reactor design and commercialization.
Article
Engineering, Chemical
Jiangkui Hu, Shijie Yang, Yingying Pei, Xilong Wang, Yulong Liao, Shuai Li, Aolong Yue, Jia-Qi Huang, Hong Yuan
Summary: This review discusses the interfacial issues in all-solid-state lithium batteries (ASSLBs) based on sulfide solid electrolytes (SEs) and high-voltage cathodes, and proposes strategies to stabilize the electrolyte/cathode interfaces. The future research direction of electrolyte/cathode interfaces and the application prospects of powder technology in sulfide-based ASSLBs are also discussed.