Liquid –liquid mass transfer and pressure drop behavior in micro‐packed beds with different shaped packings
AbstractIn this work, the liquid –liquid two-phase pressure drop and mass transfer characteristics in micro-packed beds with different shaped packing are investigated. The experimental results show that the liquid–liquid mass transfer performance of micro-packed bed is significantly affected by both apparent flow rates and phas e ratio. By changing the characteristic size of the micro-packed bed, the experimental results show that the average volume mass transfer coefficient has no obvious correlation with the length of the bed, which indicates that the flow and dispersion behavior along the length of the micro-packed ...
Source: AIChE Journal - February 20, 2024 Category: Science Authors: Jingwei Zhang, Xiaohui Zhang, Jianhong Xu, Zhuo Chen Tags: RESEARCH ARTICLE Source Type: research

Issue Information ‐ Table of Contents
(Source: AIChE Journal)
Source: AIChE Journal - February 17, 2024 Category: Science Tags: ISSUE INFORMATION ‐ TABLE OF CONTENTS Source Type: research

Insight into the SO2 poisoning of heterobimetallic FeCu ‐SSZ‐13 zeolite in NH3‐SCR reaction
AbstractThe SO2 poisoning of a heterobimetallic FeCu-SSZ-13 in selective catalytic reduction of NO with NH3 (NH3-SCR) was systematically investigated in this study. It was shown that when SO2 is involved in the feeding flue gas, the losses in the redox ability of active metals (primary contributor to deactivation) and in the number of Br ønsted acid sites both inhibit the formation of NH4NO2 intermediate, resulting in the rapid deactivation of FeCu-SSZ-13. The SO2 poisoning of FeCu-SSZ-13 at low temperature is more serious than at high temperature, because of the more severe loss of redox ability of active metals. Unlike ...
Source: AIChE Journal - February 17, 2024 Category: Science Authors: Zheguan Lin, Chan Wang, Tiesen Li, Haibo Zhu, Lilong Jiang, Yuanyuan Yue, Xiaojun Bao Tags: RESEARCH ARTICLE Source Type: research

Fabrication of stable and selective non ‐noble metal catalysts for selective alkyne hydrogenation
AbstractModification of Ni/Al2O3 catalysts with Sn is appealing for tuning catalyst activity and selectivity for hydrogenation reactions. However, a strong interaction between the Al2O3 and Sn ions can lead to problems when a traditional impregnation strategy is employed. For example, tin aluminate complexes can form and uneven distribution of the metals can occur. In this work, a support coordination induction strategy is developed, in which the use of a rod-shaped Al2O3 with a high number penta-coordinated Al3+ surface species prepared from a rotating liquid film reactor was used. The unsaturated Al3+ coordination sites ...
Source: AIChE Journal - February 17, 2024 Category: Science Authors: He Yu, Yuanfei Song, Tianci Zheng, Alan J. McCue, Lirong Zheng, Weipei Chen, Junting Feng, Zhe Zhang, Yanan Liu, Dianqing Li Tags: RESEARCH ARTICLE Source Type: research

Predicting PC ‐SAFT parameters based on COSMO‐RS
AbstractTo predict the size (m,σ) and energy (ε) parameters of the perturbed-chain statistical associating fluid theory (PC-SAFT) based on the conductor-like screening model for realistic solvents (COSMO-RS), in this work, the PC-SAFT model parameters of 304 substances were reviewed and summarized, their COSMO-RS results linked to the size and energy were predicted, and the relationships between the PC-SAFT parameters and COSMO-RS results were obtained in 3 cases (Case 1: relationships based onn-alkanes, Case 2: category-specific relationships, Case 3: generic relationships for 138 substances). Case 2 (including Case 1) ...
Source: AIChE Journal - February 17, 2024 Category: Science Authors: Zhengxing Dai, Lei Wang, Zhida Zuo, Jing Fan, Xiaohua Lu, Xiaoyan Ji Tags: RESEARCH ARTICLE Source Type: research

The bubble size and rise velocity of bubble ‐induced three‐phase inverse fluidized bed (BIFB)
AbstractThe bubble size and rise velocity were investigated in detail using a new telecentric photographic probe in a pilot-scale bubble-induced three-phase inverse fluidized bed (BIFB). By the influence of the bubble flow behavior, the particle bed goes through four different flow regimes with increasing gas velocity in BIFB. An obvious normal bubble size distribution caused by bubble coalescence and breakup was observed. A parameter of “size span” was proposed to describe the distribution width of bubble size. The average bubble size increases with the axial distance from the column bottom and with the gas velocity u...
Source: AIChE Journal - February 17, 2024 Category: Science Authors: Keying Ma, Zeneng Sun, Yuanyuan Shao, Jesse Zhu Tags: RESEARCH ARTICLE Source Type: research

The d ‐band energy level splitting of ferric group (Fe, Co, Ni) metals drives the adsorption‐conversion of polysulfides
AbstractThe notorious lithium polysulfides (LiPSs) shuttle effect, which results in low capacity, subpar rate performance, and quick capacity deterioration, has severely restricted the practical applications of lithium sulfur (Li-S) batteries. Therefore, it is very important for modified materials to promote thermodynamics and redox kinetics in the entrapping-conversion process of polysulfides. Density functional theory (DFT) calculations show that ferric group (Fe, Co, Ni) transition metals not only provide moderate binding contacts with LiPSs but also act as an active catalyst in the spontaneous and sequential lithiation...
Source: AIChE Journal - February 17, 2024 Category: Science Authors: Tong Li, Yajie Sun, Kaixiang Shi, Weilun Qin, Hangyi Chen, Junhao Li, Yuying Zheng, Quanbing Liu, Zhenxing Liang Tags: RESEARCH ARTICLE Source Type: research

Data ‐driven parallel Koopman subsystem modeling and distributed moving horizon state estimation for large‐scale nonlinear processes
AbstractIn this article, we consider a state estimation problem for large-scale nonlinear processes in the absence of first-principles process models. By exploiting process operation data, both process modeling and state estimation design are addressed within a distributed framework. By leveraging the Koopman operator concept, a parallel subsystem modeling approach is proposed to establish interactive linear subsystem process models in higher-dimensional subspaces, each of which correlates with the original nonlinear subspace of the corresponding process subsystem via a nonlinear mapping. The data-driven linear subsystem m...
Source: AIChE Journal - February 17, 2024 Category: Science Authors: Xiaojie Li, Song Bo, Xuewen Zhang, Yan Qin, Xunyuan Yin Tags: RESEARCH ARTICLE Source Type: research

Preparation of asymmetric tubular Co ‐SiC catalytic membrane for synergistic removal of PM2.5, NO, and toluene
This study lays the foundation for the practical implementation of SiC catalytic membranes in industrial emissions treatment. (Source: AIChE Journal)
Source: AIChE Journal - February 17, 2024 Category: Science Authors: Jiahao Chen, Yongliang Yin, Jiesong Tan, Yiqing Zeng, Ze ‐Xian Low, Zhaoxiang Zhong, Weihong Xing Tags: RESEARCH ARTICLE Source Type: research

Multi ‐objective optimization of radially stirred tank based on CFD and machine learning
AbstractStructural optimization is essential to improve the performance of mixing equipment. An efficient optimization strategy based on computational fluid dynamics, machine learning, and the multi-objective genetic algorithm was proposed to predict and optimize the performance of the stirred tank. Single-factor analysis was performed to study the effects of structural parameters on power consumption and mixing time, which were reduced by 16.0% and 1.4%, respectively, in the optimized stirred vessel. To further optimize the stirred tank geometries and maximize the integrated performance, XGB coupled NSGA- ІІ were utiliz...
Source: AIChE Journal - February 17, 2024 Category: Science Authors: Xuezhi Zhao, Haoan Fan, Gaobo Lin, Zhecheng Fang, Wulong Yang, Mian Li, Jianghao Wang, Xiuyang Lu, Bolong Li, Ke ‐Jun Wu, Jie Fu Tags: RESEARCH ARTICLE Source Type: research

Lignin ‐assisted alloying engineering of CoNiRu trimetallic nano‐catalyst for effective overall water splitting
This study demonstrated the importance of lignin-driven alloying on enhancing catalytic performance and provided a concept for the development of high-efficiency catalysts and high-value utilization of polyphenol biomass. (Source: AIChE Journal)
Source: AIChE Journal - February 17, 2024 Category: Science Authors: Dalang Chen, Jianglin Liu, Xueqing Qiu, Bowen Liu, Xiaofei Wang, Zhongjie Qiu, Xuliang Lin, Yanlin Qin Tags: RESEARCH ARTICLE Source Type: research

Optimizing the cask effect in multicomponent natural gas purification to provide high methane productivity
AbstractThe efficient separation of CH4 from natural gas containing C2H6 and C3H8 impurities is an important topic. Previous work on the separation of CH4/C2H6/C3H8 mixtures often focuses on the C3H8/CH4 selectivity, inadvertently sidelining the critical importance of C2H6/CH4 selectivity. This oversight results in reduced CH ₄ productivity and compromised separation efficiency, a phenomenon often termed as the “cask effect.” Herein, we fine-tune the interrelationship between thermodynamics and kinetics, targeting enhanced CH4 production. A synergistic thermodynamic –kinetic C3H8/CH4 and C2H6/CH4 selectivity is ach...
Source: AIChE Journal - February 17, 2024 Category: Science Authors: Yuxin Chen, Yunjia Jiang, Jiahao Li, Xianghao Hong, Haofei Ni, Lingyao Wang, Nan Ma, Mingman Tong, Rajamani Krishna, Yuanbin Zhang Tags: RESEARCH ARTICLE Source Type: research

CAPBO: A cost ‐aware parallelized Bayesian optimization method for chemical reaction optimization
AbstractBayesian optimization employs probabilistic surrogate models to effectively address expensive and time-consuming closed-loop chemical experimental design. However, traditional Bayesian optimization focuses on reducing the number of iterations and follows an inherently sequential process (with one new data point sampled in each iteration), which is an inefficient means of exploiting and characterizing reactions using parallel microreactors. In this article, we present an approach that overcomes this issue by considering two essential factors: experimental cost sensitivity and parallelization. We propose a novel cost...
Source: AIChE Journal - February 17, 2024 Category: Science Authors: Runzhe Liang, Haoyang Hu, Yueheng Han, Bingzhen Chen, Zhihong Yuan Tags: RESEARCH ARTICLE Source Type: research