Chinese Journal of Chemical Engineering最新文献

Synergistic effect of Co0 with Cu11In9 intermetallic compound enhancing catalytic performance of CO2 hydrogenation to methanol Co0与Cu11In9金属间化合物的协同作用增强了CO2加氢制甲醇的催化性能

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-10-01 DOI: 10.1016/j.cjche.2025.06.023

Wei Liu , Xiaoshen Li , Shaohui Xiong , Xueyang Jiang , Jiayan Yan , Xiang Duan , Yingtian Zhang , Qingpeng Cheng , Ye Tian , Xingang Li

{"title":"Synergistic effect of Co0 with Cu11In9 intermetallic compound enhancing catalytic performance of CO2 hydrogenation to methanol","authors":"Wei Liu , Xiaoshen Li , Shaohui Xiong , Xueyang Jiang , Jiayan Yan , Xiang Duan , Yingtian Zhang , Qingpeng Cheng , Ye Tian , Xingang Li","doi":"10.1016/j.cjche.2025.06.023","DOIUrl":"10.1016/j.cjche.2025.06.023","url":null,"abstract":"<div><div>CO2 hydrogenation to methanol is a critical technology for hydrogen energy conversion and a promising approach to mitigate the energy crisis and greenhouse effect. However, developing highly selective catalysts remains a major challenge for its practical application. Herein, we synthesize an efficient CoCuInO-r catalyst with Cu11In9 and Co0 dual sites on In2O3 via a sol-gel method. The Cu11In9 intermetallic compound enhances H2 adsorption capacity and strength, and increases oxygen vacancy concentration on the catalyst surface, thereby improving CO2 activation and hydrogenation efficiency. Meanwhile, Co0 suppresses the desorption of the ∗CO species, facilitating its further hydrogenation to methanol. In-situ DRIFTS experiments indicate that the CO2 hydrogenation to methanol over CoCuInO-r follows the formate pathway. Compared with CuInO-r (containing Cu11In9 on In2O3), CoCuInO-r exhibits a ∼20% increase in methanol selectivity and a 2-fold higher methanol space-time yield, reaching 7.68 mmol·g−1·h−1 at 300 °C and 4 MPa.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"86 ","pages":"Pages 25-33"},"PeriodicalIF":3.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219242","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}

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Microbubble technology and its application in chemical industry 微泡技术及其在化工中的应用

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-10-01 DOI: 10.1016/j.cjche.2025.06.013

Yun Shuai , Zhengliang Huang , Wei Li , Jingdai Wang , Yongrong Yang

引用次数: 0

Preparation of anodic catalysts via in situ exsolution of Pt nanoparticles for a methane oxidation enhanced SOEC process 原位外溶Pt纳米颗粒制备甲烷氧化强化SOEC阳极催化剂

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-10-01 DOI: 10.1016/j.cjche.2025.07.015

Liming Zhou , Kejing Wu , Qiang Hu , Houfang Lu , Bin Liang

{"title":"Preparation of anodic catalysts via in situ exsolution of Pt nanoparticles for a methane oxidation enhanced SOEC process","authors":"Liming Zhou , Kejing Wu , Qiang Hu , Houfang Lu , Bin Liang","doi":"10.1016/j.cjche.2025.07.015","DOIUrl":"10.1016/j.cjche.2025.07.015","url":null,"abstract":"<div><div>Introducing methane at the anode side of a solid oxide electrolysis cell (SOEC) has been proven to effectively suppress the oxygen evolution reaction (OER), thereby enabling hydrogen production at significantly lower voltages. In this work, a double perovskite oxide, Sr2Fe1.4Pt0.1Mo0.5O6-δ (abbreviated as Pt-SFM), was successfully synthesized by a liquid-phase method and employed as both an electronic conductor and a catalyst for methane oxidation at the SOEC anode. Following high-temperature treatment under a reducing atmosphere, platinum (Pt) nanoparticles were exsolved from the perovskite lattice and uniformly dispersed on the oxide surface. These exsolved Pt nanoparticles act as highly active sites for methane adsorption and oxidation. Electrochemical performance tests were conducted at 1123.15 K, and the results demonstrated that the Pt-SFM cell treated for 20 h (Pt-SFM 20 h) achieved a current density of 0.85 A·cm−2 at an applied voltage of 1.40 V. This performance corresponds to a 102.4% enhancement compared to the undoped SFM 20 h cell. The superior performance is attributed to the presence of exsolved Pt, which significantly improves the catalyst's ability to adsorb and dissociate methane molecules. Electrochemical impedance spectroscopy (EIS) analysis under open-circuit conditions revealed that the polarization impedance of the Pt-SFM 20 h cell was 1.25 Ω·cm2, which is 49.2% lower than that of the SFM 20 h cell. Furthermore, a 45-h long-term stability test showed that the Pt-SFM 20 h cell maintained a stable performance, with a low voltage degradation rate of only 0.67 mV·h−1.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"86 ","pages":"Pages 13-24"},"PeriodicalIF":3.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219249","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}

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Preparation of magnesium phosphate cement by salt lake magnesium slag and its hydration process 盐湖镁渣制备磷酸镁水泥及其水化工艺研究

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-09-01 DOI: 10.1016/j.cjche.2025.05.007

Weixin Zheng , Jinmei Dong , Baolan Li , Yuanrui Li , Qiang Wang , Jing Wen , Chenggong Chang

{"title":"Preparation of magnesium phosphate cement by salt lake magnesium slag and its hydration process","authors":"Weixin Zheng , Jinmei Dong , Baolan Li , Yuanrui Li , Qiang Wang , Jing Wen , Chenggong Chang","doi":"10.1016/j.cjche.2025.05.007","DOIUrl":"10.1016/j.cjche.2025.05.007","url":null,"abstract":"<div><div>Magnesium phosphate cements (MPC) have shown promising applications in many fields, but high raw material prices hinder their development. The production of salt lake MPC (SLMPC) from magnesium slag (MS), a byproduct of lithium extraction from salt lakes, offers significant environmental and economic advantages. In this study, a low-cost magnesia raw material was obtained through the calcination of MS, which was subsequently utilized in conjunction with KH2PO4 to prepare SLMPC. The changes in hydration products, microscopic morphology, solution pH value, and TG content during the SLMPC curing process, and the hydration kinetics equation and model were used to study the hydration processes of SLMPC. The results show that the outcome indicates that the SLMPC system entered the accelerated reaction stage within 6 min after mixing, where the highest heat release rate was 6.29 J·g−1·min−1, the maximum heat release was 205.3 J·g−1, and the main hydration product appeared at 50–60 min. The hydration behavior of SLMPC exhibits similarities to that of traditional MPC. Specifically, the acceleration phase is governed by an autocatalytic reaction, the deceleration phase is influenced by both autocatalytic reactions and diffusion processes, and the stabilization phase is predominantly controlled by diffusion mechanisms. This paper aims to establish the theoretical foundation for the industrial application of MS and the cost-effective production of MPC.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 294-303"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119480","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

Review on extraction and separation of valuable metal ions from aqueous solution by crown ether 冠醚萃取分离水溶液中有价金属离子的研究进展

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-09-01 DOI: 10.1016/j.cjche.2025.02.027

Jie Liu, Xin Zhang, Xingjie Lu, Qianting Li, Zhixiao Xue, Qiulu Zhang, Guizhi Wu, Wenxiang Xia

{"title":"Review on extraction and separation of valuable metal ions from aqueous solution by crown ether","authors":"Jie Liu, Xin Zhang, Xingjie Lu, Qianting Li, Zhixiao Xue, Qiulu Zhang, Guizhi Wu, Wenxiang Xia","doi":"10.1016/j.cjche.2025.02.027","DOIUrl":"10.1016/j.cjche.2025.02.027","url":null,"abstract":"<div><div>In recent years, with the rapid development of the economy and society, pollution of valuable metal ions in wastewater has become a major challenge to environmental sustainability. In order to solve the pollution caused by metal ions, researchers have conducted continuous researches and explored various remediation methods. Crown ether has attracted great attention because of its ionic radius and cavity size matching well with metal ions, which makes it have the ability to selectively complex metal ions. This unique property enables the directed removal and recovery of metal ions and makes crown ethers increasingly popular in extraction and separation processes. In this paper, the research progress of crown ethers in the extraction and separation of valuable metal ions was reviewed, with emphasis on the principles, extraction systems and the key factors affecting the extraction process. This study can provide some technical support for the application of separation and extraction of valuable metal ions by crown ether.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 217-227"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097191","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}

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Coupling of palladium nanoparticles with biofilm improved co-reduction of chromium(VI) and nitrate 钯纳米粒子与生物膜的耦合改善了铬和硝酸盐的共还原

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-09-01 DOI: 10.1016/j.cjche.2025.03.018

Chengyang Wu , Siqing Xia , Qiyuan Pang , Suyun Xu , Hongbo Liu

{"title":"Coupling of palladium nanoparticles with biofilm improved co-reduction of chromium(VI) and nitrate","authors":"Chengyang Wu , Siqing Xia , Qiyuan Pang , Suyun Xu , Hongbo Liu","doi":"10.1016/j.cjche.2025.03.018","DOIUrl":"10.1016/j.cjche.2025.03.018","url":null,"abstract":"<div><div>Chromium (Cr) contamination in water poses significant health risks, yet advanced remediation methods remain limited. Cr(VI) reduction catalyzed by palladium nanoparticles (PdNPs) on hydrogen-transfer membranes has shown potential but requires further optimization. This study investigated the simultaneous microbial-driven and Pd-catalyzed Cr(VI) reduction, focusing on reduction efficiency and optimal conditions. Two hydrogen-based membrane reactors were compared: a Pd-biofilm reactor incorporating PdNPs associated with a biofilm, and a control biofilm reactor. Continuous experiments demonstrated the superior performance of the Pd-biofilm reactor, achieving immediate Cr(VI) reduction and effluent Cr(III) concentrations below 0.040 mg·L−1, compared to 0.3 mg·L−1 in the control biofilm reactor. High-throughput sequencing identified Dechloromonas as the dominant microbial species within Pd-biofilm, which plays a critical role in metal ion reduction. The Pd-biofilm reactor maintained high Cr(VI) reduction flux across varying conditions. When the influent Cr(VI) loading reached up to 10 mg·L−1, where the control biofilm reactor experienced inhibition, the Pd-biofilm reactor achieved a Cr removal of 99%. Increased nitrate loading and hydrogen pressure further enhanced Pd-biofilm reactor performance without compromising Cr(VI) reduction since Cr(VI) is the preferential electron acceptor, whereas the biofilm reactor required hydrogen pressures ≥15 psig (1 psig = 6.895 kPa) for similar results. The optimal pH range for Cr(VI) reduction was 5.0–8.0 in the Pd-biofilm reactor and 7.0 in the biofilm reactor, with alkaline conditions being more inhibitory than acidic ones in both systems. The Pd-biofilm reactor effectively reduced Cr(VI) concentrations from 1 to 10 mg·L−1 to below the maximum contaminant level of 0.1 mg·L−1, thus appearing as an efficient technique to treat Cr-contaminated waters.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 105-113"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097710","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 simulation analysis of particle motion behavior and key structures inside a novel cyclone separator 新型旋风分离器内颗粒运动特性及关键结构的数值模拟分析

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-09-01 DOI: 10.1016/j.cjche.2025.03.015

Jie Kou , Hang Qiu , Chenyang Wang

{"title":"Numerical simulation analysis of particle motion behavior and key structures inside a novel cyclone separator","authors":"Jie Kou , Hang Qiu , Chenyang Wang","doi":"10.1016/j.cjche.2025.03.015","DOIUrl":"10.1016/j.cjche.2025.03.015","url":null,"abstract":"<div><div>This study proposes a novel cyclone separator with a conical inner core to enhance particle classification efficiency in oil and gas wellhead-recovered liquids. Particle motion and force dynamics are analyzed to optimize key structural parameters, including inlet diameter (Di), overflow pipe diameter (De), insertion depth (Le), and bottom flow pipe diameter (Dz). Numerical simulations employ the Reynolds stress turbulence model, SIMPLEC algorithm, and discrete phase model to evaluate separation performance in a gas–liquid two-phase system. Results indicate that a smaller Di improves fine particle separation but increases turbulence; an optimal range of Di/Dc = 0.35–0.4 is recommended. Larger De enhances the diversion ratio, aiding fine particle discharge (De/Dc = 0.25–0.35). Increased Le facilitates fine particle overflow but induces vortices, whereas a smaller Le stabilizes the bottom flow for larger particle separation (Le/Dc = 0.5–0.75). A reduced Dz enhances centrifugal force and separation efficiency but may cause turbulence; an optimal Dz/Dc of 0.6–0.65 is suggested for stability. These findings provide valuable design guidelines for improving cyclone separator performance in multiphase flow applications.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 114-127"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097711","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}

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Influence of volume ratio of liquid CO2 to seawater on CO2 hydrate sequestration in submarine sediments 液态CO2与海水体积比对海底沉积物中CO2水合物固存的影响

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-09-01 DOI: 10.1016/j.cjche.2025.02.034

Minglong Wang , Ming Wang , Yifei Sun , Hongnan Chen , Dan Rao , Jinrong Zhong , Bei Liu , Changyu Sun , Guangjin Chen

{"title":"Influence of volume ratio of liquid CO2 to seawater on CO2 hydrate sequestration in submarine sediments","authors":"Minglong Wang , Ming Wang , Yifei Sun , Hongnan Chen , Dan Rao , Jinrong Zhong , Bei Liu , Changyu Sun , Guangjin Chen","doi":"10.1016/j.cjche.2025.02.034","DOIUrl":"10.1016/j.cjche.2025.02.034","url":null,"abstract":"<div><div>CO2 hydrate-based sequestration in submarine sediments shows great potential for carbon emission reduction. Considering the proportional relationship of CO2 and water for hydrates formation, their existing ratio largely determines the CO2 sequestration density and phase state. Here, this work focuses on determining the optimal ratio of CO2 to seawater in sediments simulated with 20−40 mesh (0.42−0.85 mm) quartz sand, in order to maximize CO2 hydrate conversion in sediments. The results show that the conversion rate of CO2 hydrate increases with the initial water saturation, reaching 15.3% at 80% initial water saturation. The optimal CO2 hydrate formation occurs at 30% initial water saturation, with the corresponding CO2 storage density in hydrate form of 33.09 kg·m−3 and the hydrate saturation of 22.3%. However, CO2 hydrate conversion rate is <10%, which implies that most CO2 still exists in liquid state, despite the presence of free water. The total CO2 sequestration density is negatively correlated with the initial water saturation, and at 10% initial water saturation, 398.73 kg·m−3 of CO2 is sequestered, of which only 18.02 kg·m−3 is hydrated. Additionally, the lower initial water saturation corresponds to the shorter time to achieve t90 of CO2 consumption, and the water conversion rate to hydrate reaches 90% at 10% initial water saturation. In summary, adjusting the volume ratio of liquid CO2 to seawater can effectively increase the sequestration amount of CO2 hydrates, but methods to increase CO2 conversion to hydrate still need to be established.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 327-334"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156512","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

The sulfur and water resistance improvement of Pt/TiO2 catalyst for CO oxidation reaction by anatase and rutile TiO2 crystal interfaces 锐钛矿和金红石型TiO2晶体界面改善CO氧化反应Pt/TiO2催化剂的耐硫和耐水性能

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-09-01 DOI: 10.1016/j.cjche.2025.03.019

Zhenxing Feng , Bin Song , Zongcheng Zhan , Lei Xu , Hanlei Sun , Shuo Yao , Hongzhi Wang , Licheng Liu

{"title":"The sulfur and water resistance improvement of Pt/TiO2 catalyst for CO oxidation reaction by anatase and rutile TiO2 crystal interfaces","authors":"Zhenxing Feng , Bin Song , Zongcheng Zhan , Lei Xu , Hanlei Sun , Shuo Yao , Hongzhi Wang , Licheng Liu","doi":"10.1016/j.cjche.2025.03.019","DOIUrl":"10.1016/j.cjche.2025.03.019","url":null,"abstract":"<div><div>Catalytic oxidation is an effective strategy for eliminating CO pollutant. Pt/TiO2 catalyst are one of the most active catalysts as used, but facing the issue of sulfur and water deactivation. In this study, TiO2 was synthesized using a sol-gel method, while Pt/TiO2 was prepared by impregnation method. By varying the calcination temperature of the TiO2 support, Pt/TiO2 catalysts with different proportions of anatase and rutile phases were synthesized. At the calcination temperature of 500 °C, the catalysts exhibited approximately equal proportions of anatase and rutile, resulting in exceptional catalytic activity for CO oxidation, as well as improved resistance to sulfur and water in the flue gas. Consequently, the Pt/TiO2-500 catalyst achieved a CO conversion of 93% at 160 °C. Even under conditions of 8% (vol) H2O and 0.016% (vol) SO2 (GHSV = 300000 ml·h−1·g−1), the CO conversion remained above 95% at 220 °C for 46 h. The catalysts were characterized and analyzed using various techniques. The results indicated that anatase-phase TiO2 exhibited weak CO adsorption capacity but strong SO2 adsorption capacity, whereas rutile-phase TiO2 demonstrated strong CO adsorption capacity and weak SO2 adsorption capacity. The presence of the anatase phase mitigated the CO self-poisoning phenomenon of the catalyst, while the biphase interface reduced the adsorption and oxidation of SO2 on the catalyst’s surface, significantly inhibiting the deposition of TiOSO4. Consequently, the Pt/TiO2-500 catalyst displayed the highest CO catalytic activity along with superior resistance to sulfur and water.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 128-139"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097136","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}

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A soft sensing method for mechanical properties of hot-rolled strips based on improved co-training 基于改进协同训练的热轧带钢力学性能软测量方法

IF 3.7 3区工程技术

Chinese Journal of Chemical Engineering Pub Date : 2025-09-01 DOI: 10.1016/j.cjche.2025.04.010

Bowen Shi, Jianye Xue, Hao Ye

{"title":"A soft sensing method for mechanical properties of hot-rolled strips based on improved co-training","authors":"Bowen Shi, Jianye Xue, Hao Ye","doi":"10.1016/j.cjche.2025.04.010","DOIUrl":"10.1016/j.cjche.2025.04.010","url":null,"abstract":"<div><div>Accurately soft sensing of the mechanical properties of hot-rolled strips is essential to ensure product quality, optimize production, and reduce costs. However, it faces the difficulty caused by limited labeled samples, for which co-training based semi-supervised learning offers a potential solution. So in this paper, a novel soft sensing method for mechanical properties based on improved co-training (ICO) is proposed. Compared with the existing co-training framework, the proposed ICO introduces improvements from the aspects of multiple view partition, confidence estimation, and pseudo-label assignment. Specifically, (ⅰ) in the stage of multiple view partition, ICO integrates metallurgical mechanisms of hot rolling processes and statistical mutual information to achieve a balance between view sufficiency and independence, which improves model performance and interpretability; (ⅱ) in the stage of confidence estimation, ICO evaluates the confidence of unlabeled samples at the cluster level rather than at the level of a single sample, which facilitates the exploration of sample distribution and the selection of representative samples; (ⅲ) in the pseudo-label assignment stage, ICO adopts a safe pseudo-label algorithm (which is called SAFER by its author and originally used for each single sample) to assign pseudo-labels for cluster of samples with the highest confidence determined in the previous step stage, to take advantage of the merit of handling unlabeled samples at the cluster level mentioned above on one hand, and the merit of SAFER in enhancing the quality of pseudo-labels on the other hand. The proposed soft sensing method effectively predicts mechanical properties on the real hot rolling dataset, achieving approximately 5% improvement in <math><mrow><msup><mi>R</mi><mn>2</mn></msup></mrow></math> compared to traditional supervised learning.</div></div>","PeriodicalId":9966,"journal":{"name":"Chinese Journal of Chemical Engineering","volume":"85 ","pages":"Pages 238-250"},"PeriodicalIF":3.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097193","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