Chinese Journal of Chemical Engineering最新文献

{"title":"Current advances in distillation processes for fermentative acetone-butanol-ethanol purification","authors":"Xuedan Hou ,&nbsp;Pengfei Zhao ,&nbsp;Xiaohui Lin ,&nbsp;Yunxing Gao ,&nbsp;Huidong Chen ,&nbsp;Di Cai ,&nbsp;Peiyong Qin","doi":"10.1016/j.cjche.2024.08.014","DOIUrl":"10.1016/j.cjche.2024.08.014","url":null,"abstract":"<div><div>Acetone-butanol-ethanol (ABE) fermentation is a primary strategy for producing bio-based <em>n-</em>butanol from abundant renewable biomass. In the typical ABE production chain, distillation is an essential unit for high purity A-B-E productions, but has long been criticized by the energy-inefficient processes due to the extremely low solvents concentration received in the upstream fermentation system. Over the past decades, efforts have been dedicated to developing eco-efficient ABE distillation processes aimed at reducing both energy costs and capital investments. In this review, a comprehensive overview on ABE distillation systems is provided from physico-chemical properties in feed and thermodynamics to the process constructions and applications. The recent trends in distillation sequence construction that fitting with the rapid developed upstream <em>in situ</em> product recovery (ISPR) systems are emphasized. Furthermore, towards developing a more efficient ABE distillation system, the review takes a broad overview of the intensification strategies for ABE distillation. Along with systematic introduction of the key examples, the future directions for ABE distillation techniques development are also discussed towards a sustainable and low-carbon emission biorefineries.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"79 ","pages":"Pages 91-108"},"PeriodicalIF":3.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic effect between nitrogen-doped sites and metal chloride for carbon supported extra-low mercury catalysts in acetylene hydrochlorination","authors":"Yiyang Qiu ,&nbsp;Chong Liu ,&nbsp;Xueting Meng ,&nbsp;Yuesen Liu ,&nbsp;Jiangtao Fan ,&nbsp;Guojun Lan ,&nbsp;Ying Li","doi":"10.1016/j.cjche.2024.11.007","DOIUrl":"10.1016/j.cjche.2024.11.007","url":null,"abstract":"<div><div>Carbon-supported mercury catalysts are extensively employed in calcium carbide-based polyvinyl chloride (PVC) industries, but the usage of mercury-based catalysts can pose an environmental threat due to the release of mercury into the surrounding area during the operation period. In this study, a highly active and stable mercury-based catalyst was developed, utilizing the nitrogen atom of the support as the anchor site to enhance the interaction between active sites (HgCl₂) and the carbon support (N-AC). Thermal loss rate testing and thermogravimetric analysis results demonstrate that, compared to commercial activated carbon, N-doped carbon can effectively increase the heat stability of HgCl₂. The obtained mercury-based catalysts (HgCl₂/N-AC) exhibit significant catalytic performance, achieving 2.5 times the C₂H₂ conversion of conventional HgCl₂/AC catalysts. Experimental analysis combined with theoretical calculations reveals that, contrary to the Eley-Rideal (ER) mechanism of HgCl₂/AC, the HgCl₂/N-AC catalyst follows the Langmuir-Hinshelwood (LH) adsorption mechanism. The nitrogen sites and HgCl₂ on the catalyst enhance the adsorption capabilities of the HCl and C₂H₂, thereby improving the catalytic performance. Based on the modification of the active center by these solid ligands, the loading amount of HgCl₂ on the catalyst can be further reduced from the current 6.5% to 3%. Considering the absence of successful industrial applications for mercury-free catalysts, and based on the current annual consumption of commercial mercury chloride catalysts in the PVC industry, the widespread adoption of this technology could annually reduce the usage of chlorine mercury by 500 tons, making a notable contribution to mercury compliance, reduction, and emissions control in China. It also serves as a bridge between mercury-free and low-mercury catalysts. Moreover, this solid ligand technology can assist in the application research of mercury-free catalysts.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"79 ","pages":"Pages 145-154"},"PeriodicalIF":3.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zn2+ significantly enhances the performance of petal-like Co-naphthalenetetracarboxylic acid MOF as an anode material for lithium-ion batteries","authors":"Qin Cheng,&nbsp;Pengfei Ma,&nbsp;Ruize Yin,&nbsp;Chaodi Wang,&nbsp;Weiwei Xiong,&nbsp;Zhongyao Duan,&nbsp;Fu Yang,&nbsp;Junhao Zhang","doi":"10.1016/j.cjche.2024.10.034","DOIUrl":"10.1016/j.cjche.2024.10.034","url":null,"abstract":"<div><div>Metal-organic frameworks (MOFs), with their ultrahigh specific surface area, uniformly distributed pores, and tunable structures, are promising candidates for next-generation active electrode materials in lithium-ion batteries (LIBs). However, their application is hindered by poor cycling stability due to structural collapse during charge-discharge cycles. To address this issue, we developed an alloy and multi-solvent thermal method strategy to synthesize Co/Zn bimetallic MOFs based on Naphthalenetetracarboxylic acid (NTCA). The resulting petal-like Co/Zn-NTCA MOF demonstrates outstanding electrochemical performance. The incorporation of zinc ions not only significantly enhances cycling stability but also markedly increases the specific capacity of the anode material. At a current density of 200 mA·g⁻¹, the Co/Zn (2:1)-NTCA MOF demonstrated an impressive reversible capacity of 956 mA·h·g⁻¹ after 150 cycles. Even after 500 cycles, the specific capacity of the electrode remained high, with a value of 438 mA·h·g⁻¹ at a current density of 1000 A·g⁻¹.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"79 ","pages":"Pages 164-171"},"PeriodicalIF":3.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of wavelet neural network with chaos theory for enhanced forecasting of pressure drop signals in vapor−liquid−solid fluidized bed evaporator","authors":"Xiaoping Xu ,&nbsp;Ting Zhang ,&nbsp;Zhimin Mu ,&nbsp;Yongli Ma ,&nbsp;Mingyan Liu","doi":"10.1016/j.cjche.2024.10.010","DOIUrl":"10.1016/j.cjche.2024.10.010","url":null,"abstract":"<div><div>The dynamics of vapor−liquid−solid (V−L−S) flow boiling in fluidized bed evaporators exhibit inherent complexity and chaotic behavior, hindering accurate prediction of pressure drop signals. To address this challenge, this study proposes an innovative hybrid approach that integrates wavelet neural network (WNN) with chaos analysis. By leveraging the Cross-Correlation (C−C) method, the minimum embedding dimension for phase space reconstruction is systematically calculated and then adopted as the input node configuration for the WNN. Simulation results demonstrate the remarkable effectiveness of this integrated method in predicting pressure drop signals, advancing our understanding of the intricate dynamic phenomena occurring with V−L−S fluidized bed evaporators. Moreover, this study offers a novel perspective on applying advanced data-driven techniques to handle the complexities of multi-phase flow systems and highlights the potential for improved operational prediction and control in industrial settings.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"78 ","pages":"Pages 67-81"},"PeriodicalIF":3.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kinetics of hydrogen sulfide removal from coke oven gas over faujasite zeolite: Experimental and modeling studies","authors":"Feng Gao ,&nbsp;Sixiao Zhu ,&nbsp;Liping Chang ,&nbsp;Weiren Bao ,&nbsp;Jinghong Ma ,&nbsp;Junjie Liao","doi":"10.1016/j.cjche.2024.10.022","DOIUrl":"10.1016/j.cjche.2024.10.022","url":null,"abstract":"<div><div>The removal of H₂S from coke oven gas (COG) is an important issue for the further utilization of COG. Zeolites could be used for industrial desulfurization owing to their high thermal stability and regenerability. However, further analysis on the kinetics of deep desulfurization using zeolites is necessary to provide relevant information for industrial design. In this study, the desulfurization breakthrough curves of faujasite (FAU) zeolite in COG were measured using a fixed bed reactor. The adsorption isotherm was investigated using the Langmuir, Freundlich, Temkin, Dubinin-Radushkevich models. The adsorption saturated capacity of H₂S was inversely related to the temperature. The results show that the Langmuir model best fits the adsorption isotherm with a lower value of root-mean-square-error (RMSE) and Chi-Square (<em>χ</em>²), and the calculated activation energy is 14.62 kJ·mol⁻¹. The adsorption kinetics were investigated using pseudo-first-order (PFO), pseudo-second-order (PSO), Bangham and Weber-Morris models. The Bangham model fitted the kinetic data well, indicating that pore diffusion is an influential factor in the adsorption process. The Weber-Morris model suggests that the adsorption rate was not solely determined by the pore diffusion, but was also influenced by the active site on the FAU zeolite. The adsorption breakthrough curves under different gas flow rates were fitted using the bed depth service time (BDST) model, and it provides an accurate prediction of the breakthrough time with a small relative error. The results of thermodynamic analysis demonstrated the feasibility and spontaneity (Δ<em>G</em>&lt;0) and exothermic (Δ<em>H</em>&lt;0) nature of the adsorption process of the FAU zeolite for H₂S under COG.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"78 ","pages":"Pages 232-244"},"PeriodicalIF":3.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distributed asynchronous double accelerated optimization for ethylene plant considering delays","authors":"Ting Wang ,&nbsp;Zhongmei Li ,&nbsp;Wenli Du","doi":"10.1016/j.cjche.2024.11.003","DOIUrl":"10.1016/j.cjche.2024.11.003","url":null,"abstract":"<div><div>Considering the complexity of plant-wide optimization for large-scale industries, a distributed optimization framework to solve the profit optimization problem in ethylene whole process is proposed. To tackle the delays arising from the residence time for materials passing through production units during the process with guaranteed constraint satisfaction, an asynchronous distributed parameter projection algorithm with gradient tracking method is introduced. Besides, the heavy ball momentum and Nesterov momentum are incorporated into the proposed algorithm in order to achieve double acceleration properties. The experimental results show that the proposed asynchronous algorithm can achieve a faster convergence compared with the synchronous algorithm.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"78 ","pages":"Pages 245-250"},"PeriodicalIF":3.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fluorosurfactants and their application in droplet microreactors: An overview","authors":"Wei Cheng,&nbsp;Huilin Wen,&nbsp;Xiaoqiang Chen,&nbsp;Shaobin Zhang,&nbsp;Ziyi Yu","doi":"10.1016/j.cjche.2024.11.001","DOIUrl":"10.1016/j.cjche.2024.11.001","url":null,"abstract":"<div><div>Fluorosurfactants play a crucial role in ensuring the stability and uniformity of droplet microreactors, which significantly broaden their applications in chemical and biological research. This review covers structure diversity and functional versatility of fluorosurfactants. Fluorosurfactants can be divided into two basic types according to their structure, linear and dendritic types, which both provides individual advantages. Linear fluorosurfactants are easily synthesized and commercially available, whereas dendritic fluorosurfactants have a branched structure that greatly reduces molecular cross-talk between droplets. Based on the application point of view, fluorosurfactants can be further classified into two categories: reactive and responsive fluorosurfactants. The hydrophilic head of reactive fluorosurfactants contains a reactive functional group, making them very useful in other applications, such as microcapsule preparation or protein crystallization. In contrast, responsive fluorosurfactants would change their properties with respect to external stimuli, such as temperature or light, making them perfect candidates for the on-demand control of droplet behavior. Development of these new classes of fluorosurfactants has expanded the capabilities and applications of droplet microreactors that enables interdisciplinary challenges to be solved.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"78 ","pages":"Pages 314-326"},"PeriodicalIF":3.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical simulation of power and flow field characteristics of different spiral stirred reactors","authors":"Qingzhao Liu,&nbsp;Yang Qin,&nbsp;Guodong Zhu,&nbsp;Xubin Zhang,&nbsp;Fumin Wang,&nbsp;Guobing Li,&nbsp;Shuai Liu,&nbsp;Zhiwei Zhang,&nbsp;Bingxin Zhu,&nbsp;Zheng Wang","doi":"10.1016/j.cjche.2024.10.021","DOIUrl":"10.1016/j.cjche.2024.10.021","url":null,"abstract":"<div><div>Under the dual-carbon background, the technological updating of traditional high-energy-consuming equipment should not be delayed, and the problem of reactor energy consumption should not be ignored. Therefore, this study is based on computational fluid dynamics (CFD) theory to simulate the spiral stirred reactor with different design parameters (distance of paddle from bottom surface to reactor height ratio <em>h</em>₁/<em>H</em>, diameter of stirring paddle to reactor diameter ratio <em>D</em>_s/<em>D</em>, length of blade section to reactor height ratio <em>L</em>_s/<em>H</em>). It was found that the reactor designed with lower <em>L</em>_s/<em>H</em> values and higher <em>h</em>₁/<em>H</em>, <em>D</em>_s/<em>D</em> values would have smaller power number (<em>Np</em>) values and smaller flow field average velocity. In addition, this study also fitted the correlation equation of <em>Np</em> concerning Reynolds number and <em>h</em>₁/<em>H</em>, <em>D</em>_s/<em>D</em>, and <em>L</em>_s/<em>H</em>, and the conclusions of the study can be used as a reference for the design of industrial equipment.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"78 ","pages":"Pages 218-231"},"PeriodicalIF":3.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on sulfur resistance of MnO2/Beta zeolite in toluene catalytic combustion: The effect of increased acidity on catalytic performance","authors":"Zhuo Wang ,&nbsp;Zetao Jin ,&nbsp;Hanqi Ning ,&nbsp;Baishun Jiang ,&nbsp;Kaiyuan Xie ,&nbsp;Shufeng Zuo ,&nbsp;Qiuyan Wang","doi":"10.1016/j.cjche.2024.10.023","DOIUrl":"10.1016/j.cjche.2024.10.023","url":null,"abstract":"<div><div>Sulfur dioxide (SO₂) frequently coexist with volatile organic compounds (VOCs) in exhaust gas. The competitive adsorption of SO₂ and VOCs can adversely affect the efficiency of catalytic combustion, leading to catalyst poisoning and irreversible loss of activity. To investigate the impact of sulfur poisoning on the catalysts, we prepared the MnO₂/Beta zeolite, and a corresponding series of sulfur-poisoned catalysts through <em>in-situ</em> thermal decomposition of (NH₄)₂SO₄. The decrease in toluene catalytic activity of poisoned MnO₂/Beta zeolite primarily results from the conversion of the active species MnO₂ to MnSO₄. However, the crystal structure and the porous structure of MnO₂/Beta zeolite were stable, and original structure was still maintained when 1.6% (mass) sulfur species were introduced. Furthermore, the extra-framework Al of Beta zeolite could capture sulfur species to generate Al₂(SO₄)₃, thereby reducing sulfur species from reacting with Mn⁴⁺ active sites. The combination of sulfur and Beta zeolite was found to directly produce new strong-acid sites, thus effectively compensating for the effect of reduced Mn⁴⁺ active species on the catalytic activity.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"78 ","pages":"Pages 187-195"},"PeriodicalIF":3.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regional collaborative allocation of emergency resources for enterprises within a chemical industry park based on the worst credible accident scenarios","authors":"Shangzhi Liu ,&nbsp;Yaqi Wang ,&nbsp;Qinglong Liu ,&nbsp;Shilong Pang ,&nbsp;Dongfeng Zhao ,&nbsp;Jiangbo Jiu","doi":"10.1016/j.cjche.2024.09.032","DOIUrl":"10.1016/j.cjche.2024.09.032","url":null,"abstract":"<div><div>Emergency resources play a vital role in the emergency rescue process. The adequate and timely supply of emergency resources can effectively control the development of accidents and reduce accident losses. However, the current emergency resource allocation of chemical enterprises lacks scientific analysis of accident scenarios, and the individual allocation method of enterprises increases the cost of emergency resource allocation. Given the above problems, this paper proposes a regional collaborative allocation method of emergency resources for enterprises within the chemical industry park (CIP) based on the worst credible accident scenario (WCAS). Firstly, the concept and analysis method of the WCAS is proposed. Then, based on the characteristics and consequences of the accident, the mapping relationship between accident scenarios and emergency resources is established. Finally, an optimization model for regional collaborative allocation of emergency resources is constructed to determine the amount of emergency resource allocation for each enterprise. Through the case study, the emergency resource allocation method based on the WCAS analysis can better meet the demands of accident emergency rescue. Simultaneously, the regional collaborative allocation optimization model can strengthen the cooperation ability among enterprises, greatly reducing the cost of emergency resource allocation for each enterprise.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"78 ","pages":"Pages 140-149"},"PeriodicalIF":3.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}