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Thermoregulatory molecular sieving in crystals

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Science China Materials 2024年第10期67卷 3419-3420页

作者： Guozhen Liu wanqin jin Gongping Liu State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211800China

Sub-nanometer channels for the selective recognition of the components in chemical mixtures from others play a crucial role in the adsorption and membrane separation[1].It remains a grand challenge to separate small m... 详细信息

关键词： structure. molecular separation

Regulation of interlayer channels of graphene oxide nanosheets in ultra-thin Pebax mixed-matrix membranes for CO_(2) capture

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Chinese Journal of Chemical Engineering 2024年第3期67卷 257-267页

作者： Feifan Yang Yuanhang jin Jiangying Liu Haipeng Zhu Rong Xu Fenjuan Xiangli Gongping Liu wanqin jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Shandong Production and Research Long Membrane Technology Development Co. Ltd.Yantai Economic Development ZoneYantai 265505China

For the application of carbon capture by membrane process,it is crucial to develop a highly permeable CO_(2)-selective *** this work,we reported an ultra-thin polyether-block-amide(Pebax)mixedmatrix membranes(MMMs)incorporated by graphene oxide(GO),in which the interlayer channels were regulated to optimize the CO_(2)/N_(2) separation *** membrane preparation conditions were systematically investigated on the influence of the membrane structure and separation performance,including the lateral size of GO nanosheets,GO loading,thermal reduction temperature,and *** results demonstrated that the precisely regulated interlayer channel of GO nanosheets can rapidly provide CO_(2)-selective transport channels due to the synergetic effects of size sieving and preferential *** GO/Pebax ultra-thin MMMs exhibited CO_(2)/N_(2) selectivity of 72 and CO_(2) permeance of 400 GPU(1 GPU=106 cm^(3)(STP)·cm^(2)·s^(-1)·cmHg^(-1)),providing a promising candidate for CO_(2) capture.

关键词： Mixed-matrix membrane Ultra-thin membrane Pebax Graphene oxide CO_(2) capture

Solar-assisted two-stage catalytic membrane reactor for coupling CO2 splitting with methane oxidation reaction

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GREEN ENERGY & ENVIRONMENT 2024年第11期9卷 1771-1780页

作者： Tan, jinkun Gu, Zhenbin Liu, Zhengkun Wang, Pei Meijboom, Reinout Zhang, Guangru jin, wanqin Nanjing Tech Univ Coll Chem Engn State Key Lab Mat Oriented Chem Engn 30 Puzhu Rd S Nanjing 211816 Peoples R China Nanjing Tech Univ Quzhou Quzhou Membrane Mat Innovat Inst Quzhou 324000 Peoples R China Hohai Univ Coll Energy & Elect Engn Nanjing 211106 Peoples R China Univ Johannesburg Dept Chem Sci POB 524 ZA-2600 Auckland Pk South Africa

A two-stage catalytic membrane reactor (CMR) that couples CO2 2 splitting with methane oxidation reactions was constructed based on an oxygen-permeable perovskite asymmetric membrane. The asymmetric membrane comprises a dense SrFe 0.9 Ta 0.1 O 3-d (SFT) separation layer and a porous Sr 0.9 (Fe 0.9 Ta 0.1 ) 0.9 Cu 0.1 O 3-d (SFTC) catalytic layer. In the first stage reactor, a CO2 2 splitting reaction (CDS: 2CO2 2- 2CO + O2) 2 ) occurs at the SFTC catalytic layer. Subsequently, the O2 2 product is selectively extracted through the SFT separation layer to the permeated side for the methane combustion reaction (MCR), which provides an extremely low oxygen partial pressure to enhance the oxygen extraction. In the second stage, a Sr 0.9 (Fe 0.9 Ta 0.1 ) 0.9 Ni 0.1 O 3-d (SFTN) catalyst is employed to reform the products derived from MCR. The two-stage CMR design results in a remarkable 35.4% CO2 2 conversion for CDS at 900 degrees C. The two-stage CMR was extended to a hollow fiber configuration combining with solar irradiation. The solar-assisted two-stage CMR can operate stably for over 50 h with a high hydrogen yield of 18.1 mL min-1 1 cm- 2 . These results provide a novel strategy for reducing CO2 2 emissions, suggesting potential avenues for the design of the high-performance CMRs and catalysts based on perovskite oxides in the future. (c) 2024 Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： CO2 2 splitting Two-stage catalytic membrane reactor Perovskite oxide Asymmetric membrane Solar irradiation assisted CARBON-DIOXIDE THERMAL-DECOMPOSITION TRANSPORT MEMBRANE CONVERSION REDUCTION WATER HYDROGEN GAS

基于三维多孔填料的聚二甲基硅氧烷混合基质渗透汽化膜研究进展

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华东理工大学学报（自然科学版） 2024年第5期50卷 633-644页

作者：赵静金万勤南京工业大学化工学院材料化学工程国家重点实验室南京211816

开发高性能渗透汽化膜材料是提高渗透汽化膜技术的竞争力,实现高效、低能耗有机溶剂分离回收过程的重要途径。聚二甲基硅氧烷(PDMS)是目前应用最为广泛的有机溶剂优先渗透型渗透汽化膜材料,但其分离性能不理想。在PDMS膜主体内引入多孔... 详细信息

开发高性能渗透汽化膜材料是提高渗透汽化膜技术的竞争力,实现高效、低能耗有机溶剂分离回收过程的重要途径。聚二甲基硅氧烷(PDMS)是目前应用最为广泛的有机溶剂优先渗透型渗透汽化膜材料,但其分离性能不理想。在PDMS膜主体内引入多孔填料构筑混合基质膜,有望同时强化有机溶剂分子的溶解与扩散行为,实现分离性能的提升。与一维及二维填料相比,三维填料具有丰富连通的内部孔道,孔道结构一般不存在取向性,且填料种类及功能化手段丰富,是目前研究最为广泛的填料类型。本文综述了近年来基于三维多孔填料的PDMS混合基质膜的研究进展,分析了不同类型三维多孔填料的特点、混合基质膜的制备方法及影响其性能的关键因素,并提出了PDMS混合基质膜的研究挑战,以期为高性能PDMS混合基质膜的开发提供借鉴。

关键词：三维多孔填料聚二甲基硅氧烷混合基质膜渗透汽化分离回收

光热驱动的膜分离生物甲烷制氢过程建模与仿真分析

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化工学报 2024年第3期75卷 967-973页

作者：王沛段睿明张广儒金万勤可再生能源发电技术教育部工程研究中心江苏南京210098 南京工业大学材料化学工程国家重点实验室江苏南京211816

光热驱动的甲烷重整制氢技术,是将太阳能转化为燃料的主要技术路径之一。引入聚光集热技术,可实现太阳能的全光谱利用,有效提高太阳能到燃料化学能的转化效率,同时显著降低系统能耗及碳排放。将多孔碳化硅吸热体和La_(1-x)Sr_(x)Co_(1-y... 详细信息

光热驱动的甲烷重整制氢技术,是将太阳能转化为燃料的主要技术路径之一。引入聚光集热技术,可实现太阳能的全光谱利用,有效提高太阳能到燃料化学能的转化效率,同时显著降低系统能耗及碳排放。将多孔碳化硅吸热体和La_(1-x)Sr_(x)Co_(1-y)Fe_(y)O_(3-δ)钙钛矿透氧膜结合,提出一种光热驱动的膜反应制氢的设计思路,实现了连续、高效的制氢过程。完成了该反应过程的概念设计,建立考虑辐射-传热-膜分离-反应的数值模型并进行仿真模拟;重点评估了膜表面的温度均匀性,并分析温度对膜内反应及出口产物的影响规律。结果表明,该模型可以有效精准描述概念设计过程。研究成果可为光热驱动的高温膜反应器设计和放大提供理论依据以及初步设计方法。

关键词：动态建模动态仿真太阳能甲烷部分氧化制氢透氧膜概念设计

面向一/二价离子分离的金属有机骨架膜研究进展

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化工学报 2024年第4期75卷 1183-1197页

作者：莫滨宇张雅馨刘国振刘公平金万勤南京工业大学化工学院材料化学工程国家重点实验室江苏南京211816

膜分离技术因操作简单、效率高、环境友好等特点,被誉为最具发展潜力的分离技术之一。金属有机骨架是一种新兴的分离膜材料,其可调变的孔道微结构、高孔隙率、拓扑结构多样性,使其在一/二价离子分离方面具有良好潜力。回顾了近二十年金... 详细信息

膜分离技术因操作简单、效率高、环境友好等特点,被誉为最具发展潜力的分离技术之一。金属有机骨架是一种新兴的分离膜材料,其可调变的孔道微结构、高孔隙率、拓扑结构多样性,使其在一/二价离子分离方面具有良好潜力。回顾了近二十年金属有机骨架膜在一/二价离子分离的研究进展并深入探讨了其传递机理,此外,也系统总结了金属有机骨架膜的制备方法,探讨了金属有机骨架膜在一/二价离子分离领域面临的挑战及未来研究方向。

关键词：膜分离传递金属有机骨架一/二价离子

Manipulation of confined structure in alcohol-permselective pervaporation membranes

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Chinese Journal of Chemical Engineering 2017年第11期25卷 1616-1626页

作者： jing Zhao wanqin jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing 210009China

Alcohol-permselectivity pervaporation has been arousing increasingly more attention in bioalcohol production due to the advantages of environmental friendliness, low energy consumption and easy coupling with fermentation process. With the intrinsic feature of larger molecules preferentially permeating and the consequent inferiority in selective diffusion, the development of alcohol-permselective membrane is relatively retarded compared with water-permselective membrane. This review presents the prevalent membrane materials utilized for alcohol-permselective pervaporation and emphatically expatiates the representative and important developments in the past five years from the aspect of tuning confined structure in membranes. In particular, the diverse structure tuning methods are described with the classifications of physical structure and chemical structure. The corresponding structure-performance relationships in alcohol-permselective pervaporation membranes are also analyzed to identify the objective of structure optimization. Furthermore, the tentative perspective on the possible future directions of alcohol-permselective pervaporation membrane is briefly presented.

关键词： Confined structure Pervaporation Membrane Alcohol-permselective

Graphene-based membranes for pervaporation processes

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Chinese Journal of Chemical Engineering 2020年第7期28卷 1755-1766页

作者： Kecheng Guan Gongping Liu Hideto Matsuyama wanqin jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Research Center for Membrane and Film Technology Department of Chemical Science and EngineeringKobe University1-1 RokkodaiNadaKobe 657-8501Japan

Two-dimensional graphene and its derivatives exhibiting distinct physiochemical properties are intriguing building blocks for researchers from a large variety of scientific *** graphene-based materials into membrane layers brings great potentials for high-efficiency membrane ***,pervaporation by graphene-based membranes has been intensively studied with respect to the membrane design and *** review aims to provide an overview on the graphene-based membranes for pervaporation processes ranged from fabrication to *** or chemical decoration of graphene-based materials is elaborated regarding their effects on the microstructure and *** mass transport of pervaporation through graphene-based membranes is introduced,and relevant mechanisms are ***,performances of state-of-the-art graphene-based membranes for different pervaporation applications are ***,the perspectives of current challenges and future directions are presented.

关键词： Graphene Membranes Separation Pervaporation

Recent progress on nanomaterial-based electrochemical dissolved oxygen sensors

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