Layered Mg-Al spinel supported Ce-Fe-Zr-O oxygen carriers for chemical looping reforming

作     者：Jiangyong Yuan Yannan Zhao Haiwen Xu Chunqiang Lu Kun Yang Xing Zhu Kongzhai Li Jiangyong Yuan;Yannan Zhao;Haiwen Xu;Chunqiang Lu;Kun Yang;Xing Zhu;Kongzhai Li

作者机构：State Key Laboratory of Complex Nonferrous Metal Resources Clean UtilizationKunming University of Science and TechnologyKunming 650093China Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2020年第28卷第10期

页      面：2668-2676页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Key R&D Program of China(2018YFB0605401) National Natural Science Foundation of China(Nos.51774159 and 51604137) the Qinglan Project of Kunming University of Science and Technology。 

主　　题：Chemical looping reforming Syngas Hydrogen Ce-Fe-Zr-O(x)/MgAl-LDO Oxygen carrier 

摘      要：A series of layered Mg-Al spinel supported Ce-Fe-Zr-O oxygen carriers were prepared for co-production of syngas and pure hydrogen via chemical looping steam reforming(CLSR).The presence of magnesium-aluminum layered double oxides(Mg Al-LDO)significantly increases the specific surface area of the mixed oxides,reduces the particle size of CeO2-based solid solution and promotes the dispersion of free Fe2O3.When reacting with methane,Mg Al-LDO supported oxygen carrier shows much lower temperature for methane oxidation than the pure CeFe-Zr-O sample,indicating enhanced low-temperature reactivity.Among different Ce-Fe-Zr-O(x)/Mg Al-LDO samples,the Ce-Fe-Zr-O(40 wt%)/Mg Al-LDO sample shows the best performance for the selective oxidation of methane to syngas and the H2 production by water splitting.After a long period of high temperature redox experiment,the Ce-Fe-Zr-O(40 wt%)/Mg Al-LDO oxygen carrier still shows high activity for syngas generation.The comparison on the morphology of the fresh and cycled oxygen carriers indicates that the Mg-Al spinel support still forms a stable skeleton structure with high dispersion of active components on the surface after the long-term cycling,which contributes to excellent redox stability of the Ce-Fe-Zr-O(40 wt%)/Mg Al-LDO oxygen carrier.