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Exploration of the mechanism of chemical looping steam methane reforming using double perovskite-type oxides La1.6Sr0.4FeCoO6
Zhao, Kun1,2,3,4; Zheng, Anqing1,2,3; Li, Haibin1,2,3; He, Fang1,2,3; Huang, Zhen1,2,3; Wei, Guoqiang1,2,3; Shen, Yang4; Zhao, Zengli1,2,3
2017-12-15
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume219Pages:672-682
AbstractCo-production of syngas and hydrogen via chemical looping steam methane reforming (CL-SMR) using double perovskite-type oxide La1.6Sr0.4FeCoO6 as an oxygen carrier was studied. The reaction mechanisms, including the synergistic effects, the metal transitions, the oxygen diffusion and the migration of reaction boundary during the two-step reactions, were systematically investigated by the characterizations of the oxygen carriers at different reaction stages using XRD, XPS, H-2-TPR and TG technologies. Meanwhile, isothermal reactions were carried out in a fixed-bed reactor to analysis the reaction products. Three reaction stages including the total oxidation of methane with the active adsorbed oxygen, partial oxidation of methane with the lattice oxygen, and the methane decomposition were identified, using the surface of the oxygen carrier particles as reaction boundary. A large number of syngas was generated due to the concordant of methane dissociation with the lattice oxygen diffusion, and the resistant to coke formation was enhanced effectively. In the steam dissociation stage, the deep reduced metals (Fe2+ and Co-0) combining with the abundant oxygen vacancies provided enough active sites for the breakage of H-O bond of H2O. The oxygen vacancies were neutralized immediately by the O atom, and the two H atoms combined together to form amounts of H-2. These results suggested that, the positive roles displayed by the synergistic effects between multi-metals in double perovskite structure could effectively promote the partial oxidation of methane and steam splitting. It provides a potential way to develop more active oxygen carrier for CL-SMR to co-produce syngas and hydrogen by comprehensively considering the methane dissociation and the lattice oxygen diffusion. (C) 2017 Elsevier B.V. All rights reserved.
SubtypeArticle
KeywordCl-smr Double Perovskite Mechanism Reaction Boundary Synergistic Effect
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.apcatb.2017.08.027
WOS Subject ExtendedChemistry ; Engineering
WOS KeywordDIRECT PARTIAL OXIDATION ; SHELL REDOX CATALYST ; CO-RICH SYNGAS ; SYNTHESIS GAS ; OXYGEN CARRIERS ; STEPWISE PRODUCTION ; HYDROGEN ; COMBUSTION ; FE ; LAFEO3
Indexed BySCI
Language英语
Funding OrganizationNational Key Research and Development Program of China(2016YFB0901401) ; National Key Research and Development Program of China(2016YFB0901401) ; National Natural Science Foundation of China(51406208 ; National Natural Science Foundation of China(51406208 ; Science & Technology Research Project of Guangdong Province(2017A020216009 ; Science & Technology Research Project of Guangdong Province(2017A020216009 ; 51406214) ; 51406214) ; 2015A010106009) ; 2015A010106009) ; National Key Research and Development Program of China(2016YFB0901401) ; National Key Research and Development Program of China(2016YFB0901401) ; National Natural Science Foundation of China(51406208 ; National Natural Science Foundation of China(51406208 ; Science & Technology Research Project of Guangdong Province(2017A020216009 ; Science & Technology Research Project of Guangdong Province(2017A020216009 ; 51406214) ; 51406214) ; 2015A010106009) ; 2015A010106009)
WOS SubjectChemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS IDWOS:000412957100069
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/16384
Collection固体废弃物能实验室
Corresponding AuthorHe, Fang
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Guangdong, Peoples R China
2.CAS Key Lab Renewable Energy, Guangzhou, Guangdong, Peoples R China
3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou, Guangdong, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhao, Kun,Zheng, Anqing,Li, Haibin,et al. Exploration of the mechanism of chemical looping steam methane reforming using double perovskite-type oxides La1.6Sr0.4FeCoO6[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2017,219:672-682.
APA Zhao, Kun.,Zheng, Anqing.,Li, Haibin.,He, Fang.,Huang, Zhen.,...&Zhao, Zengli.(2017).Exploration of the mechanism of chemical looping steam methane reforming using double perovskite-type oxides La1.6Sr0.4FeCoO6.APPLIED CATALYSIS B-ENVIRONMENTAL,219,672-682.
MLA Zhao, Kun,et al."Exploration of the mechanism of chemical looping steam methane reforming using double perovskite-type oxides La1.6Sr0.4FeCoO6".APPLIED CATALYSIS B-ENVIRONMENTAL 219(2017):672-682.
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