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Conversion of Methane to Ethylene with BaCe_(0.9)Y_(0.1)Co_(x)O_(3-δ)Hydrogen Permeation Membrane

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Chinese Journal of Structural Chemistry 2021年第7期40卷 901-907,839页

作者：刘允袁盛泽谢奎 College of Chemistry Fuzhou UniversityFuzhou 350116China Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China

Dehydrogenation coupling of methane(DCM),which can be effectively used to produce low carbon alkenes,has the advantages of rich raw materials,simple reaction device,low energy consumption,etc.Herein,we report a series of Co doped perovskite porous-dense BaCe_(0.9)Y_(0.1)Co_(x)O_(3-δ)(BCYCx)membrane for DCM.After treatment in a reduced atmosphere,a large number of Co nanoparticles will exsolute on the surface of BCY.The metal-oxide interface is helpful to activate the C–H bonds,inhibit the carbon deposition,and so on.The XRD,SEM and XPS prove that Co nanoparticles homogeneously distributed on the BCYCx porous layers,which will create a large quantity of catalytic active sites.At 1100℃,the highest concentration of C_(2)product was 5.66%(5.25%ethane+0.41%ethylene)in output gas when methane conversion reaches a maximum value of 24.8%,and the C_(2)selectivity gets to 45.6%.We further demonstrate the catalytic performance of high-temperature DCM without obvious decrease after running for 30 hours.

关键词： mixed-conducting dehydrogenation methane metal nanoparticle membrane

A Novel Zirconium-Based Perovskite-Type Membrane Material for Oxygen Permeation

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Chinese Chemical Letters 2001年第9期12卷 835-838页

作者： Jian Hua TONG Wei Shen YANG Rui CAI Bai Chun ZHU State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of SciencesP.O.Box 110Dalian 116023

A novel zirconium-based membrane material of BaCo0.4Fe0.4Zr0.2O3-6 with cubic perovskite structure was synthesized for the first time through a method of citric and EDTA acid combined complexes. The structural stability was characterized by XRD, O-2-TPD and H-2-TPR techniques respectively. The high oxygen permeation flux of 0.873 mL/cm(2) min at 950 degreesC was obtained under He/Air gradient. Meanwhile, the single activation energy for oxygen permeation and the long-term steady operation of 200 h at 800 degreesC were achieved.

关键词： Perovskite mixed-conducting oxygen separation zirconium

Partial oxidation of methane to syngas in tubular oxygen-permeable reactor

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Chinese Science Bulletin 2002年第7期47卷 534-537页

作者： Wang Haihui Cong You Yang Weishen State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of Sciences116023DalianChina

A dense Ba0.5Sr0.5Co0.8Fe0.2O3-δ membrane tube was prepared by the extruding method. Furthermore, a membrane reactor with this tubular membrane was successfully applied to partial oxidation of methane (POM) reaction, in which the separation of oxygen from air and the partial oxidation of methane are integrated in one process. At 875°C, 94% of methane conversion, 98% of CO selectivity, 95% of H2 selectivity, and as high as 8.8 mL/(min·cm2) of oxygen flux were obtained. In POM reaction condition, the membrane tube shows a very good stability.

关键词： membrane reactor oxygen separation POM mixed-conducting membrane syngas perovskite.

Conversion of Methane to Ethylene with BaCe;Y;Co;O;Hydrogen Permeation Membrane

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Chinese Journal of Structural Chemistry 2021年

作者：刘允袁盛泽谢奎 CollegeofChemistry，FuzhouUniversity KeyLaboratoryofDesignandAssemblyofFunctionalNanostructures，FujianInstituteofResearchontheStructureofMatter，ChineseAcademyofSciences CollegeofChemistryandMaterialsScience，FujianNormalUniversity

Dehydrogenation coupling of methane （DCM）， which can be effectively used to produce low carbon alkenes， has the advantages of rich raw materials， simple reaction device， low energy consumption， etc. Herein， we report a series of Co doped perovskite porous-dense BaCe;Y;Co;O;（BCYCx） membrane for DCM. After treatment in a reduced atmosphere， a large number of Co nanoparticles will exsolute on the surface of BCY. The metal-oxide interface is helpful to activate the C–H bonds， inhibit the carbon deposition， and so on. The XRD， SEM and XPS prove that Co nanoparticles homogeneously distributed on the BCYCx porous layers， which will create a large quantity of catalytic active sites. At 1100 ℃， the highest concentration of C;product was 5.66% （5.25% ethane + 0.41% ethylene） in output gas when methane conversion reaches a maximum value of 24.8%， and the C;selectivity gets to 45.6%. We further demonstrate the catalytic performance of high-temperature DCM without obvious decrease after running for 30 hours.

关键词： mixed-conducting dehydrogenation methane metal nanoparticle membrane