A CO and CO2 tolerating (La0.9Ca0.1)2(Ni0.75Cu0.25)O4+δ Ruddlesden-Popper membrane for oxygen separation

查看全文 作　　者：Guoxing [1,3]Chen;Marc [1,3]Widenmeyer;Binjie [3]Tang;Louise [3]Kaeswurm;Ling [3]Wang;Armin [2]Feldhoff;Anke [1,4]Weidenkaff

机构地区：[1]Institute of Materials Science,Technische Universität Darmstadt,64287 Darmstadt,Germany;[2]Institute of Physical Chemistry and Electrochemistry,Leibniz Universität Hannover,30167 Hannover,Germany;[3]Institute for Materials Science,Universität Stuttgart,70569 Stuttgart,Germany;[4]Fraunhofer Institute IWKS,63457 Hanau,Germany

出　　处：《Frontiers of Chemical Science and Engineering》索引2020年第14卷第3期,共10页

基　　金：This work is part of the project “Plasma-induced CO2-conversion”(PiCK,project number:03SFK2S3B)and financially supported by the German Federal Ministry of Education and Research in the framework of the“Kopemikus projects for the Energiewende”.The authors are thankfUl to B.Sc.Laura Steinle(University of Stuttgart)for her assistance during the CO stability tests,and Christine Stefani and Prof.Dr.Robert Dinnebier(Max Planck Institute for Solid State Research,Stuttgart)for the in situ PXRD measurements,respectively.G.C.thanks Frank Hack and Dr.Angelika Veziridis for their kind support during experiments and discussions. 摘　　要：A series of novel dense mixed conducting ceramic membranes based on K2NiF4-type(La1-xCax)2(Ni0.75Cu0.25)O4+δwas successfully prepared through a sol-gel route.Their chemical compatibility,oxygen permeability,CO and CO2 tolerance,and long-term CO2 resistance regarding phase composition and crystal structure at different atmospheres were studied.The results show that higher Ca contents in the material lead to the formation of CaCO3.A constant oxygen permeation flux of about 0.63 mL·min−1·cm−2 at 1173 K through a 0.65 mm thick membrane was measured for(La0.9Ca0.1)2(Ni0.75Cu0.25)O4+δ,using either helium or pure CO2 as sweep gas.Steady oxygen fluxes with no sign of deterioration of this membrane were observed with increasing CO2 concentration.The membrane showed excellent chemical stability towards CO2 for more than 1360 h and phase stability in presence of CO for 4 h at high temperature.In addition,this membrane did not deteriorate in a high-energy CO2 plasma.The present work demonstrates that this(La0.9Ca0.1)2(Ni0.75Cu0.25)O4+δmembrane is a promising chemically robust candidate for oxygen separation applications. 关键词：K2NiF4 structure oxygen permeation membrane CO2 and CO resistances CO2 plasma resistance long-term robustness

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A CO and CO2 tolerating (La0.9Ca0.1)2(Ni0.75Cu0.25)O4+δ Ruddlesden-Popper membrane for oxygen separation

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