Chinese Journal of Chemical Engineering最新文献_第8页

Hydrothermal preparation of CuS2-Cu2O decorated TiO2 for highly efficient activation of peroxymonosulfate to degrade chloroquine phosphate 水热法制备CuS2-Cu2O修饰TiO2高效活化过氧单硫酸盐降解磷酸氯喹

IF 3.5 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2026-07-01 Epub Date: 2026-04-08 DOI: 10.1016/j.cjche.2026.01.020

Yuyao Wang, Dawei Wang, Sirapassorn Kiatphuengporn, Paweena Prapainainar, Anusorn Seubsai

{"title":"Hydrothermal preparation of CuS2-Cu2O decorated TiO2 for highly efficient activation of peroxymonosulfate to degrade chloroquine phosphate","authors":"Yuyao Wang, Dawei Wang, Sirapassorn Kiatphuengporn, Paweena Prapainainar, Anusorn Seubsai","doi":"10.1016/j.cjche.2026.01.020","DOIUrl":"10.1016/j.cjche.2026.01.020","url":null,"abstract":"<div><div>Surface modification of titanium dioxide (TiO<sub>2</sub>) with transition metals is a feasible solution to enhance its ability to activate peroxymonosulfate (PMS) for environmental remediation. In this study, a novel composite catalyst comprising nano-CuS<sub>2</sub> and Cu<sub>2</sub>O decorated anatase-TiO<sub>2</sub> (CuS<sub>2</sub>-Cu<sub>2</sub>O/TiO<sub>2</sub>) was successfully synthesized <em>via</em> a hydrothermal method using thiourea as the sulfur source. The CuS<sub>2</sub>-Cu<sub>2</sub>O/TiO<sub>2</sub> catalyst exhibited excellent performance for the degradation of chloroquine phosphate (CQ) through a photo-assisted PMS activation process, achieving 99% removal efficiency within 10 min under UV irradiation. The effects of PMS dosage and solution pH on CQ degradation were investigated in detail. Mechanism studies, including active species quenching experiments, electron paramagnetic resonance (EPR), and electrochemical analysis, revealed that the redox cycling of Cu<sup>+</sup>/Cu<sup>2+</sup> within the CuS<sub>2</sub>-Cu<sub>2</sub>O domains and the efficient photo-induced electron transfer derived from TiO<sub>2</sub> are the key steps in PMS activating. Reactive species, such as photogenerated holes (h<sup>+</sup>), hydroxyl radicals (·OH), and singlet oxygen (<sup>1</sup>O<sub>2</sub>) played essential roles in the oxidative degradation of CQ. Furthermore, liquid chromatography–mass spectrometry (LC–MS) analysis enabled the identification of intermediate products, based on which two plausible degradation pathways of CQ were proposed. This work demonstrates the feasibility of photo-assisted PMS activation for the removal of pharmaceutical pollutants and provides insights into the rational design of TiO<sub>2</sub>-based composite photocatalysts for wastewater treatment.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"95 ","pages":"Pages 80-89"},"PeriodicalIF":3.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148573722","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}

引用次数: 0

Dual Mo and Se vacancies in dual S-scheme heterojunction suppress charge recombination and boost redox capability for simultaneous removal of tetracycline and Cr(VI) 双s型异质结中Mo和Se双空位抑制电荷复合并提高同时去除四环素和Cr（VI）的氧化还原能力

IF 3.5 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2026-07-01 Epub Date: 2026-02-16 DOI: 10.1016/j.cjche.2026.01.011

Pengfei Tian, Yunan Shen, Yuzhe Hua, Xiyu Zou, Guangmin Ren, Qingjie Guo, Hongjing Tian

{"title":"Dual Mo and Se vacancies in dual S-scheme heterojunction suppress charge recombination and boost redox capability for simultaneous removal of tetracycline and Cr(VI)","authors":"Pengfei Tian, Yunan Shen, Yuzhe Hua, Xiyu Zou, Guangmin Ren, Qingjie Guo, Hongjing Tian","doi":"10.1016/j.cjche.2026.01.011","DOIUrl":"10.1016/j.cjche.2026.01.011","url":null,"abstract":"<div><div>Mo vacancy (V<sub>Mo</sub>) and Se vacancy (V<sub>Se</sub>) are doped into Bi<sub>2</sub>MoO<sub>6</sub> (BMO) and ZnSe, respectively, while they are mechanically ground and mixed to fabricate the dual S-scheme heterojunction. The lattice distortion is observed at the interface between V<sub>Mo</sub>-BMO and V<sub>Se</sub>-ZnSe/CdSe (V<sub>Se</sub>-ZCS) while XPS results confirm the construction of the dual S-scheme heterojunction V<sub>Mo</sub>-BMO/V<sub>Se</sub>-ZCS (V<sub>Mo</sub><sub>+</sub><sub>Se</sub>-BZCS). DFT simulation demonstrate that the doping of V<sub>Mo</sub> and V<sub>Se</sub> lead to more electrons transferring spontaneously through the heterojunction interfaces and promote the IEF strength accordingly. Both <em>in-situ</em> XPS and fs-TAS characterization prove the presence of a fast photoinduced charge transfer pathway from V<sub>Mo</sub>-BMO to V<sub>Se</sub>-ZnSe under LED light irradiation. V<sub>Mo</sub> and V<sub>Se</sub> function as the holes trapping center in V<sub>Mo</sub>-BMO and the electron trapping center in V<sub>Se</sub>-ZCS, respectively, thereby effectively suppressing the electron-hole recombination, which enhances the redox capability of V<sub>Mo</sub><sub>+</sub><sub>Se</sub>-BZCS together with the fast charge transferring. During the photocatalytic degradation experiments for the wastewater containing both tetracycline (TC) and Cr(VI), both the TC and the Cr(VI) degradation efficiency of V<sub>Mo</sub><sub>+</sub><sub>Se</sub>-BZCS are competitive under either LED or xenon lamp irradiation in comparison with some reported catalysts. Dual doping of V<sub>Mo</sub> and V<sub>Se</sub> were testified to amplify the bi-directional promotion effects (BPEs) between TC and Cr(VI).</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"95 ","pages":"Pages 113-128"},"PeriodicalIF":3.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148573726","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}

引用次数: 0

Characterization of dynamic behavior in the liquid spray zone of a bottom-spouted fluidized bed 底喷流化床液体喷雾区动态特性的表征

IF 3.5 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2026-07-01 Epub Date: 2026-04-16 DOI: 10.1016/j.cjche.2026.01.025

Chengbin Sun, Meng Wang, Dekang Zhan, Tuo Guo, Mingzhou Wu, Man Wu, Qingjie Guo

{"title":"Characterization of dynamic behavior in the liquid spray zone of a bottom-spouted fluidized bed","authors":"Chengbin Sun, Meng Wang, Dekang Zhan, Tuo Guo, Mingzhou Wu, Man Wu, Qingjie Guo","doi":"10.1016/j.cjche.2026.01.025","DOIUrl":"10.1016/j.cjche.2026.01.025","url":null,"abstract":"<div><div>The dynamic behavior and particle shape effects in the liquid spray zone were investigated through temperature standard deviation, liquid–solid contact efficiency, and electrical conductivity signals. Results indicate that temperature standard deviation increases with proximity to the nozzle. Elevated atomisation gas velocity (<em>U</em><sub>L</sub>) reduces droplet diameter and improves their dispersion, which leads to a more uniform temperature distribution and a resulting decrease in standard deviation. The temperature standard deviation is decreased and then increased with the increasing of fluidized gas velocity (<em>U</em><sub>f</sub>). Non-spherical particles had a higher temperature standard deviation than spherical particles. This resulted from particle agglomeration, where lower sphericity led to stronger fluctuations. The liquid–solid contact efficiency is enhanced with the increasing of spouted gas velocity (<em>U</em><sub>s</sub>), <em>U</em><sub>L</sub>, and <em>U</em><sub>f</sub> all. As the liquid spouted rate (<em>Q</em><sub>L</sub>) increased, the liquid–solid contact efficiency, determined by particle capture of droplets, first rose and then declined. Non-spherical particles exhibit higher liquid–solid contact efficiency than that of spherical particles due to longer residence times, and larger contact areas with droplets. Droplet fluctuations are intense near the nozzle, resulting in high electrical conductivity signal intensity. Increased <em>U</em><sub>s</sub> enhances airflow effects, causing frequent voltage signal fluctuations. Flake-like particles accumulate more droplets due to agglomeration, enabling droplets to reach higher bed positions. These studies provide promising research directions for the development of adsorbent pelletization in CO<sub>2</sub> capture.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"95 ","pages":"Pages 194-206"},"PeriodicalIF":3.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148573727","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}

引用次数: 0

Molecular dynamics study on proton transport in Nafion, sulfonated polyethylene, and sulfonated poly(ether ether ketone) membranes 质子在Nafion膜、磺化聚乙烯膜和磺化聚醚醚酮膜中的分子动力学研究

IF 3.5 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2026-07-01 Epub Date: 2026-04-07 DOI: 10.1016/j.cjche.2026.03.005

Siyu Gong , Ruifang Shi , Xuan Wang , Xiaofei Xu , Qingwei Gao , Shuangliang Zhao

{"title":"Molecular dynamics study on proton transport in Nafion, sulfonated polyethylene, and sulfonated poly(ether ether ketone) membranes","authors":"Siyu Gong , Ruifang Shi , Xuan Wang , Xiaofei Xu , Qingwei Gao , Shuangliang Zhao","doi":"10.1016/j.cjche.2026.03.005","DOIUrl":"10.1016/j.cjche.2026.03.005","url":null,"abstract":"<div><div>Understanding the proton transport mechanisms in polymer electrolyte membranes (PEMs) is crucial for optimizing proton exchange membrane fuel cells. In this study, classical molecular dynamics simulations are employed to systematically investigate the proton transport behavior in three representative membranes: Nafion, sulfonated polyethylene (P21SA), and sulfonated poly(ether ether ketone) (SPEEK). The results reveal that proton transport in Nafion is dominated by the classical hopping mechanism (CHM), facilitated by the extensive free volume, well-connected water channels, and highly dynamic hydrogen-bond network. In contrast, SPEEK exhibits limited free volume and narrow-twisted water channels, which can suppress hydrogen-bond network reorganization. The proton transport in SPEEK is primarily governed by the vehicle mechanism. P21SA shows intermediate features between Nafion and SPEEK, displaying a hybrid transport mechanism. This study establishes direct correlations between nanoscale morphology, hydrogen-bond network dynamics, and proton transport behavior, providing molecular-level insights for the rational design of PEM materials.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"95 ","pages":"Pages 129-138"},"PeriodicalIF":3.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148415690","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}

引用次数: 0

Numerical investigation of microporous layer structure on mass transport and durability in proton exchange membrane water electrolyzers 质子交换膜水电解槽中微孔层结构对质量传递和耐久性影响的数值研究

IF 3.5 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2026-07-01 Epub Date: 2026-03-10 DOI: 10.1016/j.cjche.2026.02.003

Lei Zhang , Youliang Cheng , Yipeng Zhang , Chen Ju , Tianrang Yang

{"title":"Numerical investigation of microporous layer structure on mass transport and durability in proton exchange membrane water electrolyzers","authors":"Lei Zhang , Youliang Cheng , Yipeng Zhang , Chen Ju , Tianrang Yang","doi":"10.1016/j.cjche.2026.02.003","DOIUrl":"10.1016/j.cjche.2026.02.003","url":null,"abstract":"<div><div>Proton exchange membrane water electrolyzers (PEMWEs) are considered a core technology for high-purity hydrogen production and renewable energy integration. Their performance and durability are strongly governed by electrode microstructural design. To address systematic studies on the role of the microporous layer (MPL) in electrolyzers gap, we develop a two-dimensional, two-phase, multiphysics-coupled model to investigate how MPL location, thickness, porosity, and wettability affect electrolysis performance, oxygen distribution, and the pressure difference across the membrane. The results show that the effect of the anode MPL is significantly stronger than that of the cathode, effectively improving oxygen distribution uniformity by 16.3%, reducing liquid water saturation at the anode, and optimizing gas–liquid co-transport. Increasing the MPL thickness markedly enhances the oxygen mole fraction in the catalyst layer and improves distribution uniformity; however, excessive thickness or extreme hydrophobicity/hydrophilicity leads to performance deterioration. More importantly, the presence of the anode MPL reduces the transmembrane gas pressure difference by up to 50%. In addition, the thickness, porosity, and hydrophobicity synergistic optimization can improve efficiency while enhancing safety and durability at high current densities. The optimal AMPL parameters are proposed as the thickness of 50–90 μm, contact angle of 80°, and porosity of 0.2–0.3. This study provides theoretical insights and practical guidance for electrode microstructural design in PEMWEs, with important implications for large-scale applications.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"95 ","pages":"Pages 23-40"},"PeriodicalIF":3.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148402835","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}

引用次数: 0

Interpretable machine learning-based prediction of hydrodynamic performance of divided fixed-valve tray in distillation columns 基于可解释机器学习的精馏塔分段固定阀塔板流体动力性能预测

IF 3.5 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2026-07-01 Epub Date: 2026-04-08 DOI: 10.1016/j.cjche.2026.01.019

Peng Wang , Xing Yuan , Kehan Wang , Shiji Xu , Jiaxing Xue , Huan Wang , Xiuhua Wu , Hongkang Zhao , Qunsheng Li

{"title":"Interpretable machine learning-based prediction of hydrodynamic performance of divided fixed-valve tray in distillation columns","authors":"Peng Wang , Xing Yuan , Kehan Wang , Shiji Xu , Jiaxing Xue , Huan Wang , Xiuhua Wu , Hongkang Zhao , Qunsheng Li","doi":"10.1016/j.cjche.2026.01.019","DOIUrl":"10.1016/j.cjche.2026.01.019","url":null,"abstract":"<div><div>Accurate prediction of tray hydrodynamics is essential for the design and optimization of modern distillation equipment. Conventional empirical correlations often show limited generalizability across diverse operating conditions, restricting their practical applicability. In this study, a data-driven modeling (DDM) framework integrated with Interpretable machine learning (ML) was developed to predict the hydrodynamic characteristics of a divided fixed-valve tray, including wet pressure drop, clear liquid height, weeping rate, and entrainment rate. A total of 760 experimental data points were obtained from cold-model experiments. Four machine learning algorithms—Random Forest, Extreme Gradient Boosting, Support Vector Regression, and a shallow Multilayer Perceptron—were trained and compared. Model performance was evaluated using the coefficient of determination (<em>R</em><sup>2</sup>), root mean square error (RMSE), and a composite <em>R</em><sup>2</sup>-based index (<em>R</em><sub>com</sub>). Among these, the SVR model achieved the highest predictive accuracy, with <em>R</em><sub>com</sub> values of 0.9750 and 0.9834 for the test and extension sets, respectively. Building upon the best-performing SVR model, an expanded feature set was constructed using physically informed transformations of the orifice kinetic energy factor and overflow strength. Pearson correlation and SHAP analyses were applied to quantify each feature’s contribution, revealing the dominant hydrodynamic drivers and clarifying their positive or negative influences on tray behavior. The integrated modeling and interpretability framework not only enhances predictive reliability but also provides actionable insight for guiding tray design and operational optimization.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"95 ","pages":"Pages 10-22"},"PeriodicalIF":3.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148365845","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}

引用次数: 0

Investigating flow field control mechanisms in a molten bath using POD and chaos theory with asymmetric nozzle arrangements 利用POD和混沌理论研究非对称喷嘴布置下熔池流场控制机理

IF 3.5 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2026-07-01 Epub Date: 2026-04-20 DOI: 10.1016/j.cjche.2026.02.014

Yu Wang, Tong Meng, Shuang Qin, Guocan Zheng, Jun Du, Shibo Wang, Changyuan Tao, Zuohua Liu

{"title":"Investigating flow field control mechanisms in a molten bath using POD and chaos theory with asymmetric nozzle arrangements","authors":"Yu Wang, Tong Meng, Shuang Qin, Guocan Zheng, Jun Du, Shibo Wang, Changyuan Tao, Zuohua Liu","doi":"10.1016/j.cjche.2026.02.014","DOIUrl":"10.1016/j.cjche.2026.02.014","url":null,"abstract":"<div><div>The flow regulation mechanism of bottom-blowing stirring is the key to enhancing the reaction efficiency of a molten bath. Herein, proper orthogonal decomposition (POD) is integrated with chaos theory for the first time to investigate the influence of asymmetric nozzle arrangements on flow field regulation and mixing performance during bottom-blowing smelting. The optimization effect of a 10° asymmetric nozzle configuration (model III) is specifically examined through numerical simulation and analysis. The results indicate that model III effectively suppresses splashing while increasing splash height and optimizing the flow field structure, thereby markedly enhancing mixing efficiency. The Lyapunov exponent in the main flow region is 1.5–2.3 times higher than that of other models, and energy cascades across the full frequency range of 50–300 Hz. POD analysis reveals that approximately 98% of the total system energy is captured by the first 68 modes, while the first two modes together account for 71.36% of the total energy, indicating a highly efficient low-order energy representation and rapid energy transfer across dominant flow structures. The asymmetric vortex structure effectively coordinates large macroscopic vortices and small-scale eddies, thereby enhancing mixing performance. This work provides theoretical support for the optimization of bottom-blowing furnace stirring systems and demonstrates the potential of POD in metallurgical process analysis.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"95 ","pages":"Pages 347-360"},"PeriodicalIF":3.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148588611","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}

引用次数: 0

Computational modeling of nanoplastic particles for polymer-binding peptide interactions at atomistic resolution 原子分辨率下聚合物结合肽相互作用的纳米塑料粒子计算模型

IF 3.5 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2026-07-01 Epub Date: 2026-04-15 DOI: 10.1016/j.cjche.2026.01.026

Yingqian Ren, Mingyu Wang, Jipeng Li, Xingqing Xiao

{"title":"Computational modeling of nanoplastic particles for polymer-binding peptide interactions at atomistic resolution","authors":"Yingqian Ren, Mingyu Wang, Jipeng Li, Xingqing Xiao","doi":"10.1016/j.cjche.2026.01.026","DOIUrl":"10.1016/j.cjche.2026.01.026","url":null,"abstract":"<div><div>Investigating the specific interactions between polymers and functional peptides allows for the rational discovery of polymer-binding peptides. These peptides can be applied to capture dispersed and dissolved nanoplastic particles in water. Molecular dynamics (MD) simulations require that the force field accurately describe the polymers’ physicochemical properties. This study utilized the generalized AMBER force field 2 (GAFF2) to simulate the folding conformations of three common polymer chains — polyethylene (PE), polypropylene (PP), and polystyrene (PS) — in an aqueous solution. The power law relationship between the radius of gyration and chain length was calculated to compare theoretical predictions. Additionally, the density and heat capacity of polymer melts were simulated and compared with experimental measurements. The simulation results confirmed the reliability of the GAFF2 in describing polymers. Subsequently, we examined molecular interactions between nanoplastic particles and polymer-binding peptides in the explicit-solvent MD simulations. Binding free energy calculations revealed that the HNKSSPLTAALP peptide exhibited the strong affinity for PE particles, followed by the TSDIKSRSPHHR peptide for PP particles, and the HWGMWSY peptide for PS particles. van der Waals interactions are essential for the specific recognition of molecules between peptides and polymers.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"95 ","pages":"Pages 217-225"},"PeriodicalIF":3.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148588616","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}

引用次数: 0

Flow field characteristics analysis of venturi ejector improved by swirler using CFD simulation 旋流器改进文丘里喷射器流场特性CFD仿真分析

IF 3.5 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2026-07-01 Epub Date: 2026-04-16 DOI: 10.1016/j.cjche.2026.01.024

Yunlong Wang, Jijun Ge, Zheng Kuang, Guoxuan Li, Pan Xu, Rongshan Bi

{"title":"Flow field characteristics analysis of venturi ejector improved by swirler using CFD simulation","authors":"Yunlong Wang, Jijun Ge, Zheng Kuang, Guoxuan Li, Pan Xu, Rongshan Bi","doi":"10.1016/j.cjche.2026.01.024","DOIUrl":"10.1016/j.cjche.2026.01.024","url":null,"abstract":"<div><div>The ejector, a key component of the jet loop reactor for efficient gas–liquid mass transfer, has its structural design and optimization as the core of process intensification. In this work, based on the self-designed down-jet venturi ejector, water–air is used as the working medium, and a swirler structure is added to the nozzle. Combined with the computational fluid dynamics (CFD) method, the changes of the internal flow field of the ejector in the presence of the swirler are analyzed in depth. The effects of liquid circulation rate (<em>Q</em><sub>L</sub>), nozzle size, and swirler angle on the performance of the ejector are investigated. The results show that under the operating conditions of 0.55 m<sup>3</sup>·h<sup>−1</sup>, the combination of a 3 mm nozzle and 30° swirler can significantly improve the ejector's suction volume (<em>Q</em><sub>G</sub>) and gas–liquid interface area density (IAD). <em>Q</em><sub>G</sub> reaches 3.22 m<sup>3</sup>·h<sup>−1</sup>, and IAD is 5246.8 m<sup>2</sup>·m<sup>−3</sup>. This study reveals the internal hydrodynamic mechanism of the swirler to enhance the performance of the ejector. It provides theoretical guidance for the design and operation optimization of high-performance swirl ejectors.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"95 ","pages":"Pages 302-312"},"PeriodicalIF":3.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148573657","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}

引用次数: 0

An innovative sol-gel method for preparing LiNi0.5Mn1.5O4 material with excellent electrochemical performance 创新的溶胶-凝胶法制备电化学性能优异的LiNi0.5Mn1.5O4材料

IF 3.5 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2026-07-01 Epub Date: 2026-03-07 DOI: 10.1016/j.cjche.2026.02.001

Jiarou Ma, Jilan Li, Fei Ma, Bingke Qin

{"title":"An innovative sol-gel method for preparing LiNi0.5Mn1.5O4 material with excellent electrochemical performance","authors":"Jiarou Ma, Jilan Li, Fei Ma, Bingke Qin","doi":"10.1016/j.cjche.2026.02.001","DOIUrl":"10.1016/j.cjche.2026.02.001","url":null,"abstract":"<div><div>The spinel-structured LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> (LNMO) has become one of the most promising cathode materials for next-generation high-energy-density lithium-ion batteries. However, the commercial application of LNMO remains challenging despite decades of research. To address the challenge, developing eco-friendly, cost-effective synthesis methods for high-performance LNMO materials is of critical importance<strong>.</strong> In this study, we developed an innovative sol-gel synthesis approach utilizing cost-effective and environmentally benign soluble starch as a chelating agent. Investigation into the effects of different calcination temperatures (700, 800 and 900 °C) on LNMO materials revealed that the sample calcined at 800 °C for 3 h exhibited the best electrochemical performance. It delivered an initial discharge capacity of 136.88 mAh·g<sup>−1</sup> at 1 C, maintaining 95% of its initial capacity after 500 cycles. To the best of our knowledge, few studies have reported such excellent electrochemical performance in LNMO materials. Morphological and structural analyses revealed that the excellent electrochemical properties of the LNMO material primarily originated from its truncated octahedral morphology and disordered structure. These findings provide valuable insights into the development of LNMO materials with high-rate capability and long-cycle-life performance.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"95 ","pages":"Pages 361-374"},"PeriodicalIF":3.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148573658","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}

引用次数: 0