Frontiers of Chemical Science and Engineering最新文献

The role of Li2CO3 promoter and steam in increasing C2H4/C2H6 selectivity in chemical looping oxidative coupling of CH4 over Mn-Na2WO4/support catalysts 在Mn-Na2WO4/载体催化剂上CH4化学环氧化偶联过程中，Li2CO3促进剂和蒸汽对提高C2H4/C2H6选择性的作用

IF 4.3 3区工程技术

Frontiers of Chemical Science and Engineering Pub Date : 2025-05-19 DOI: 10.1007/s11705-025-2571-0

Jianshu Li, Juan Chen, Anna Zanina, Vita A. Kondratenko, Henrik Lund, Wen Jiang, Hanyang Zhou, Yuming Li, Guiyuan Jiang, Evgenii V. Kondratenko

{"title":"The role of Li2CO3 promoter and steam in increasing C2H4/C2H6 selectivity in chemical looping oxidative coupling of CH4 over Mn-Na2WO4/support catalysts","authors":"Jianshu Li, Juan Chen, Anna Zanina, Vita A. Kondratenko, Henrik Lund, Wen Jiang, Hanyang Zhou, Yuming Li, Guiyuan Jiang, Evgenii V. Kondratenko","doi":"10.1007/s11705-025-2571-0","DOIUrl":"10.1007/s11705-025-2571-0","url":null,"abstract":"<div><p>The main challenge in the oxidative coupling of methane to C<sub>2</sub>H<sub>6</sub>/C<sub>2</sub>H<sub>4</sub> (C<sub>2</sub>-hydrocarbons) lies in the low selectivity to the desired products due to their high reactivity to form carbon oxides. Herein, we report that the selectivity in chemical looping oxidative coupling of methane over supported Mn-Na<sub>2</sub>WO<sub>4</sub>-based catalysts can be significantly increased by catalyst promotion with Li<sub>2</sub>CO<sub>3</sub> and performing the reaction with co-fed steam. The selectivity reaches 89% (about 60% C<sub>2</sub>H<sub>4</sub> selectivity) at a methane conversion of 19%. The best-performing catalyst showed durable within 90 reaction/reoxidation cycles. With the aid of sophisticated catalyst characterization studies combined with temporal analysis of products, the origins of the enhancing effects of the promoter and steam have been elucidated and can be applied for the development of selective catalysts in various alkane oxidation reactions.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":571,"journal":{"name":"Frontiers of Chemical Science and Engineering","volume":"19 10","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125689","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

Supervised projection with adaptive label assignment for enhanced visualization and chemical process monitoring 监督投影与自适应标签分配增强可视化和化学过程监测

IF 4.3 3区工程技术

Frontiers of Chemical Science and Engineering Pub Date : 2025-05-10 DOI: 10.1007/s11705-025-2561-2

Zhi Li, Junfeng Chen, Kaige Xue, Xin Peng

{"title":"Supervised projection with adaptive label assignment for enhanced visualization and chemical process monitoring","authors":"Zhi Li, Junfeng Chen, Kaige Xue, Xin Peng","doi":"10.1007/s11705-025-2561-2","DOIUrl":"10.1007/s11705-025-2561-2","url":null,"abstract":"<div><p>Data-driven process monitoring methods are widely used in industrial tasks, with visual monitoring enabling operators to intuitively understand operational status, which is vital for maximizing industrial safety and production efficiency. However, high-dimensional industrial data often exhibit complex structures, making the traditional 2D visualization methods ineffective at distinguishing different fault types. Thus, a visual process monitoring method that combines supervised uniform manifold approximation and projection with a label assignment strategy is proposed herein. First, the proposed supervised projection method enhances the visualization step by incorporating label information to guide the nonlinear dimensionality reduction process, improving the degrees of class separation and intraclass compactness. Then, to address the lack of label information for online samples, a label assignment strategy is designed. This strategy integrates kernel Fisher discriminant analysis and Bayesian inference, assigning different label types to online samples based on their confidence levels. Finally, upon integrating the label assignment strategy with the proposed supervised projection method, the assigned labels enhance the separability of online projections and enable the visualization of unknown data to some extent. The proposed method is validated on the Tennessee Eastman process and a real continuous catalytic reforming process, demonstrating superior visual fault monitoring and diagnosis performance to that of the state-of-the-art methods, especially in real industrial applications.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":571,"journal":{"name":"Frontiers of Chemical Science and Engineering","volume":"19 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144131491","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

Nano-modifiers enhance the performance of natural ester transformer oils: challenges and future directions 纳米改性剂提高天然酯类变压器油的性能：挑战与未来方向

IF 4.3 3区工程技术

Frontiers of Chemical Science and Engineering Pub Date : 2025-05-07 DOI: 10.1007/s11705-025-2556-z

Deliang Guo, Zhuqi Xue, Yiming Yin, Haitao Duan, Xinru Wang, Linlin Duan, Sheng Han

{"title":"Nano-modifiers enhance the performance of natural ester transformer oils: challenges and future directions","authors":"Deliang Guo, Zhuqi Xue, Yiming Yin, Haitao Duan, Xinru Wang, Linlin Duan, Sheng Han","doi":"10.1007/s11705-025-2556-z","DOIUrl":"10.1007/s11705-025-2556-z","url":null,"abstract":"<div><p>Natural esters exhibit excellent flame retardant and biodegradability, which help minimize power accidents and reduce environmental impact. These qualities make natural esters a promising alternative to conventional transformer insulating oils. However, the practical applications of natural esters in power equipment have been significantly restricted by their inherent limitations, including elevated viscosity, high dielectric loss, and poor oxidative stability. Nano-modification technologies present a novel methodological approach to solve these inherent constraints. A systematic analysis of the latest research developments in nano-modified natural ester transformer oils is provided in this review. The properties of various natural esters are examined, and their suitability as base fluids is evaluated, while the modification effects and mechanisms of typical nano-additives are comprehensively reviewed. The key role of nano-modification technology in improving the overall performance of natural esters is elucidated through detailed analysis of how nanoparticles influence physical properties, dielectric properties, and oxidative stability. In addition, the practical challenges facing nano-modification technology are addressed, providing valuable theoretical guidance for future developments in this field.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":571,"journal":{"name":"Frontiers of Chemical Science and Engineering","volume":"19 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949413","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

Hydrophilic modification of polyethylene membrane for long life zinc-bromide flow batteries 长寿命溴化锌液流电池用聚乙烯膜的亲水性改性

IF 4.3 3区工程技术

Frontiers of Chemical Science and Engineering Pub Date : 2025-05-07 DOI: 10.1007/s11705-025-2557-y

Zhaolong Zhang, Jingyi Ding, Yu Xia, Yuqin Lu, Lin Meng, Kang Huang, Zhi Xu

{"title":"Hydrophilic modification of polyethylene membrane for long life zinc-bromide flow batteries","authors":"Zhaolong Zhang, Jingyi Ding, Yu Xia, Yuqin Lu, Lin Meng, Kang Huang, Zhi Xu","doi":"10.1007/s11705-025-2557-y","DOIUrl":"10.1007/s11705-025-2557-y","url":null,"abstract":"<div><p>Zinc-bromine flow batteries are considered as one of the most promising energy storage devices with high energy density and low production price. However, its practical application is hampered by the short cycle life, which is mainly due to the uneven zinc deposition and the shuttle effect of bromide ions. Modification of membranes, an important part of zinc-bromine flow batteries, is a common approach to address these issues. In this study, inspired by the adhesion mechanism of filament proteins secreted by marine mussels, we propose a novel method for modifying polyethylene membranes with polydopamine. The self-polymerization of dopamine on a polyethylene membrane surface is simple and mild compared to traditional methods. This dopamine-based modification enhances the hydrophilicity of polyethylene membrane, improves ion transport, and reduces the pore size of the membranes, effectively blocking bromine ion shuttling. Additionally, polydopamine modification promotes uniform zinc deposition, further improving the battery performance. Consequently, the resulting PDA@PE-24 membrane demonstrates a significant improvement in both voltage and energy efficiencies, reaching 83.5% and 79.7%, respectively, under 20 mA·cm<sup>−2</sup>, compared to the 80.3% and 76.5% voltage and energy efficiencies, respectively, for unmodified polyethylene membranes. Furthermore, the cycle life of a single cell increased 4-fold, operating continuously for more than 2000 h.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":571,"journal":{"name":"Frontiers of Chemical Science and Engineering","volume":"19 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140146","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

Facile and fast synthesis of nitrogen-doped biocharsupported nanoscale ferrous sulfide composite for efficient removal of aqueous Cr(VI) 氮掺杂生物炭负载纳米硫化亚铁复合材料的快速合成及高效去除水中Cr（VI）的研究

IF 4.3 3区工程技术

Frontiers of Chemical Science and Engineering Pub Date : 2025-05-07 DOI: 10.1007/s11705-025-2558-x

Shuyu Sun, Jiayu Song, Yinuo Zhang, Yaqun Ni, Qudi Zhang, Huanxin Zhang, Yuanda Du, Qiang Kong, Jiwei Liu

{"title":"Facile and fast synthesis of nitrogen-doped biocharsupported nanoscale ferrous sulfide composite for efficient removal of aqueous Cr(VI)","authors":"Shuyu Sun, Jiayu Song, Yinuo Zhang, Yaqun Ni, Qudi Zhang, Huanxin Zhang, Yuanda Du, Qiang Kong, Jiwei Liu","doi":"10.1007/s11705-025-2558-x","DOIUrl":"10.1007/s11705-025-2558-x","url":null,"abstract":"<div><p>In this work, a novel nitrogen-doped biochar-supported nanoscale ferrous sulfide composite (nFeS@NBC) was fabricated by pyrolyzing corn straw pretreated with Mohr’s salt through a one-step carbothermic reduction process, which was applied in the efficient disposal of hexavalent chromium (Cr(VI))-containing wastewater. The key effects of impregnation ratio and pyrolysis temperature on the properties and removal performance of nFeS@NBC for Cr(VI) were subsequently investigated. The properties of nFeS@NBC were characterized through a series of techniques. It indicated that FeS nanoparticles were successfully loaded and −NH<sub>2</sub> functional groups effectively formed on the biochar surface, which enhanced the removal performance of nFeS@NBC for Cr(VI) from wastewater. The removal performance of nFeS@NBC for Cr(VI) was systemically evaluated at different experimental conditions and in the presence of major co-existing ions. Adsorption kinetics was best suited to the pseudo-second-order model. Additionally, Langmuir isotherms model could well explain the adsorption experiment data for the removal of Cr(VI) by nFeS@NBC with the highest adsorption capacity of 373.85 mg·g<sup>−1</sup>. According to the thermodynamic study, nFeS@NBC dominated the adsorption of Cr(VI) through an endothermic and spontaneous process. The adsorption and reduction served as the main removal mechanisms of nFeS@NBC for aqueous Cr(VI). nFeS@NBC could be used repetitively for its regeneration. Thus, the above results showed that it was feasible and efficient to remove Cr(VI) by nFeS@NBC, providing a potential green material for environmental remediation.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":571,"journal":{"name":"Frontiers of Chemical Science and Engineering","volume":"19 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140145","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

Kinetics of platinum nanoparticles nucleation in polyol synthesis over a wide pH range and properties of Pt/C catalysts 多元醇合成中铂纳米颗粒成核动力学及Pt/C催化剂性能

IF 4.3 3区工程技术

Frontiers of Chemical Science and Engineering Pub Date : 2025-05-01 DOI: 10.1007/s11705-025-2559-9

Vladimir Guterman, Kirill Paperzh, Ilya Kantsypa, Elena Vetrova, Anatoly Metelitsa, Ilya Pankov, Yulia Pankova

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A review of enzyme immobilization technology in continuous glucose monitoring systems 葡萄糖连续监测系统中酶固定技术的研究进展

IF 4.3 3区工程技术

Frontiers of Chemical Science and Engineering Pub Date : 2025-04-30 DOI: 10.1007/s11705-025-2554-1

Xue Dong, Yanling Qi, Zheng Wang

{"title":"A review of enzyme immobilization technology in continuous glucose monitoring systems","authors":"Xue Dong, Yanling Qi, Zheng Wang","doi":"10.1007/s11705-025-2554-1","DOIUrl":"10.1007/s11705-025-2554-1","url":null,"abstract":"<div><p>Diabetes mellitus has emerged as a globally prevalent chronic metabolic disorder, characterized by persistent hyperglycemia and associated complications. Continuous glucose monitoring is a technology that continuously monitors blood glucose by implanting microelectrodes under the skin, which is the most common method of diabetes treatment. Due to the discomfort caused by frequent blood collection through traditional blood glucose monitoring, continuous glucose monitoring has become a major research focus, mainly relying on blood glucose biosensors. In this paper, the progress of electrochemical biosensors in continuous glucose monitoring systems and the characteristics of electrochemical biosensors in different stages of development were mainly summarized. The commonly used enzyme immobilization technology aiming to solve the problems of enzyme leakage, activity decrease, and sensitivity decline caused by long-term subcutaneous implantation of blood glucose biosensors were discussed, meanwhile, the advantages and disadvantages of the different methodologies were also compared. These methodological advancements provide critical insights for optimizing biosensor stability and durability, establishing a theoretical foundation for developing next-generation implantable continuous glucose monitoring devices with enhanced clinical performance.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":571,"journal":{"name":"Frontiers of Chemical Science and Engineering","volume":"19 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900692","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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Unveiling lightweight and high impact tough polypropylene foams through compatibilized in situ fibrillation integrated chemical foam injection molding 通过相容性原位颤动集成化学泡沫注塑成型，揭示了轻量化和高冲击韧性聚丙烯泡沫

IF 4.3 3区工程技术

Frontiers of Chemical Science and Engineering Pub Date : 2025-04-30 DOI: 10.1007/s11705-025-2555-0

Jing Jiang, Caiyi Jia, Suyu Yang, Zhongxing Li, Lian Yang, Xiaofeng Wang, Changwei Zhu, Qian Li

{"title":"Unveiling lightweight and high impact tough polypropylene foams through compatibilized in situ fibrillation integrated chemical foam injection molding","authors":"Jing Jiang, Caiyi Jia, Suyu Yang, Zhongxing Li, Lian Yang, Xiaofeng Wang, Changwei Zhu, Qian Li","doi":"10.1007/s11705-025-2555-0","DOIUrl":"10.1007/s11705-025-2555-0","url":null,"abstract":"<div><p>Lightweight and robust polypropylene foams are essential for resource efficiency; however, the poor foaming ability of polypropylene remains a significant challenge in developing high-performance foams. This study proposes a scalable and cost-effective strategy that integrates <i>in situ</i> fibrillation reinforcement with chemical foam injection molding. Nanofibrillar polypropylene/polyamide 6 composites were fabricated via twin-screw compounding and melt spinning. For the first time, polyamide 6 nanofibrils were observed to exhibit selective dispersion with distinct morphologies in the skin and core layers of <i>in situ</i> fibrillation injection-molded samples. The incorporation of maleic anhydride-grafted polypropylene induced a 70% reduction in polyamide 6 nanofibril diameter. Rheological and crystallization analyses demonstrated that polyamide 6 fibrils significantly enhance polypropylene viscoelasticity and crystal nucleation rate, thereby improving foamability. Compared to polypropylene foam, <i>in situ</i> fibrillation composite foam exhibited a refined and homogeneous cellular structure, with a cell size of 61 µm and a cell density of 5.8 × 10<sup>5</sup> cells·cm<sup>−3</sup> in the core layer, alongside elongated cells in the skin layer. The synergistic effects of polyamide 6 nanofibrils and maleic anhydride-grafted polypropylene resulted in a 15.4% weight reduction and 100% enhancement in impact strength compared to polypropylene foam. This work provides new insights into developing lightweight, highperformance industrial porous materials.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":571,"journal":{"name":"Frontiers of Chemical Science and Engineering","volume":"19 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900697","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

Chitosan complex based hybrid material as catalyst for hydrogen evolution reaction 壳聚糖配合物基杂化材料作为析氢反应催化剂

IF 4.3 3区工程技术

Frontiers of Chemical Science and Engineering Pub Date : 2025-04-25 DOI: 10.1007/s11705-025-2550-5

A. V. Khramenkova, D. N. Izvarina, V. V. Moshchenko, V. A. Smoliy, L. V. Klimova, O. E. Polozhentsev, A. N. Kuznetsov, K. M. Popov

{"title":"Chitosan complex based hybrid material as catalyst for hydrogen evolution reaction","authors":"A. V. Khramenkova, D. N. Izvarina, V. V. Moshchenko, V. A. Smoliy, L. V. Klimova, O. E. Polozhentsev, A. N. Kuznetsov, K. M. Popov","doi":"10.1007/s11705-025-2550-5","DOIUrl":"10.1007/s11705-025-2550-5","url":null,"abstract":"<div><p>The hybrid material based on polyelectrolyte complexes of chitosan with oxycompounds of cobalt and nickel was electrodeposited on a stainless steel plate using the method of non-stationary electrolysis. The hybrid material layer was investigated by scanning electron microscopy, atomic force microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller method, Fourier transform infrared spectroscopy, and Raman spectroscopy. The electrocatalytic properties of the hybrid material were studied in the hydrogen evolution reaction in alkaline electrolyte (1 mol·L<sup>−1</sup> NaOH). It was determined that during the initial four-hour period of the hydrogen evolution process, the overpotential underwent a substantial decline, remaining constant for a minimum of 17 h thereafter, from 289 up to 210 mV at −10 mA·cm<sup>−2</sup>. After a long-term hydrogen evolution, the activity of the hybrid material electrode exceeded hydrogen evolution reaction activity by 20% Pt/C commercial catalyst at a high current density of −100 mA·cm<sup>−2</sup>.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":571,"journal":{"name":"Frontiers of Chemical Science and Engineering","volume":"19 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900761","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

In situ thermally rearranged poly(benzoxazole-co-imide) membranes on α-alumina substrates for He/CH4 and He/N2 separation α-氧化铝衬底上原位热重排聚苯并恶唑-共亚胺膜用于He/CH4和He/N2分离

IF 4.3 3区工程技术

Frontiers of Chemical Science and Engineering Pub Date : 2025-04-25 DOI: 10.1007/s11705-025-2552-3

Lu Wang, Zhiqiang Li, Yangdong He, Chenzhi Huang, Shijin Chen, Xianyun Zhou, Xiaosong Fan, Wenjing Xie, Xuerui Wang

{"title":"In situ thermally rearranged poly(benzoxazole-co-imide) membranes on α-alumina substrates for He/CH4 and He/N2 separation","authors":"Lu Wang, Zhiqiang Li, Yangdong He, Chenzhi Huang, Shijin Chen, Xianyun Zhou, Xiaosong Fan, Wenjing Xie, Xuerui Wang","doi":"10.1007/s11705-025-2552-3","DOIUrl":"10.1007/s11705-025-2552-3","url":null,"abstract":"<div><p>Membrane gas separation is an energy-efficient approach to extract helium from natural gas. However, the limited separation performance shown as Robeson’s upper bound has hindered the techno-economic feasibility. This study introduces an advanced copolyimide membrane engineered for He extraction from natural gas. The membranes were facilely achieved by dip-coating the <i>α</i>-alumina substrates in the copolyimide solution followed by <i>in situ</i> thermal rearrangement. In addition to the rigid 5-amino-2-(4-aminobenzene)benzimidazole segments, the active ortho-hydroxyl groups were converted to benzoxazole rings, contributing to extra micropores. The membrane showed an improved mixture selectivity of 120 and He permeance of 23.5 GPU, far surpassing the performance of benchmark membranes for helium separation over CH<sub>4</sub>. The membrane also demonstrated long-term stability as evidenced by the continuous operation over 250 h. Additionally, the membrane exhibited resistance to impurities such as CO<sub>2</sub> and C<sub>2</sub>H<sub>6</sub>, enduring the asymmetric membranes promising for practical helium extraction from natural gas.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":571,"journal":{"name":"Frontiers of Chemical Science and Engineering","volume":"19 10","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900730","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