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Synergistic improvements in stability and performance of the double perovskite-type oxides La2-xSrxFeCoO6 for chemical looping steam methane reforming
Zhao, Kun1,2,3,4,5; Li, Luwei6; Zheng, Anqing1,2,3; Huang, Zhen1,2,3; He, Fang1,2,3; Shen, Yang4; Wei, Guoqiang1,2,3; Li, Haibin1,2,3; Zhao, Zengli1,2,3
2017-07-01
Source PublicationAPPLIED ENERGY
Volume197Pages:393-404
AbstractChemical looping steam methane reforming (CL-SMR) is a potential route to efficiently co-produce syngas and hydrogen. Development of oxygen carrier with high activity, good recyclability, strong resistance to carbon deposition and excellence capacity for steam splitting is highly desired for this process. The article investigated a novel and unique structure of double perovskite-type oxides La1-x,SrxFeCoO6 (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0) as oxygen carrier. XRD, XPS and H-2-TPR technologies were adopted to characterize the physical and chemical properties of them. Meanwhile, isothermal reactions and cyclic redox reactions were carried out in a fixed-bed reactor to determine the influences of Sr-substitution on the reactivity of La1-x,SrxFeCoO6. XRD results confirmed the formation of double perovskite crystal structure for all the samples, while substitution of Sr induced a certain degree of Fe/Co disorder generating oxygen vacancies and/or higher oxidation states of metal cations. Synergistic interactions between surface metal ions, such as Fe4+/Fe5+ with Co3+ which were detected by XPS, strongly enhance the reducibility of oxygen carriers. Three zones including total oxidation of methane by surface oxygen, partial oxidation of methane by lattice oxygen and carbon deposition were divided. Among the six samples with different substitution of Sr, La-0.6,Sr0.4FeCoO6 exhibited the best oxygen transport ability, thermal stability, as well as capacity for hydrogen generation. A stable CH4 conversion at similar to 90% with desired H-2/CO ratio at 2.0-2.5 in the methane reduction stage, and an average hydrogen yield at similar to 5.9 mmol/g oxygen carrier with similar to 93.8% of hydrogen concentration in the steam oxidation stage were obtained during twenty successive redox reactions, which made them very attractive for the purpose of chemical looping partial oxidation of carbon fuel in real applications. (C) 2017 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordChemical Looping Methane Reforming Double Perovskite Synergistic Effect Oxygen Vacancy
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.apenergy.2017.04.049
WOS Subject ExtendedEnergy & Fuels ; Engineering
WOS KeywordOXYGEN UNCOUPLING CLOU ; SHELL REDOX CATALYST ; FE MIXED OXIDES ; HYDROGEN-PRODUCTION ; PARTIAL OXIDATION ; CO2 CAPTURE ; COMBUSTION ; CARRIERS ; SYNGAS ; SR
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(51406208 ; Science & Technology Research Project of Guangdong Province(2015A010106009 ; Key Laboratory of Renewable Energy, Chinese Academy of Sciences(Y607j51001) ; 51406214) ; 2013B050800008)
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000401594300032
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/14120
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Beijing, Peoples R China
2.CAS Key Lab Renewable Energy, Beijing, 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
5.Southeast Univ, Minist Educ, Key Lab Energy Thermal Convers & Control, Nanjing 210095, Jiangsu, Peoples R China
6.Nanjing Univ Sci & Technol, Nanjing, Jiangsu, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhao, Kun,Li, Luwei,Zheng, Anqing,et al. Synergistic improvements in stability and performance of the double perovskite-type oxides La2-xSrxFeCoO6 for chemical looping steam methane reforming[J]. APPLIED ENERGY,2017,197:393-404.
APA Zhao, Kun.,Li, Luwei.,Zheng, Anqing.,Huang, Zhen.,He, Fang.,...&Zhao, Zengli.(2017).Synergistic improvements in stability and performance of the double perovskite-type oxides La2-xSrxFeCoO6 for chemical looping steam methane reforming.APPLIED ENERGY,197,393-404.
MLA Zhao, Kun,et al."Synergistic improvements in stability and performance of the double perovskite-type oxides La2-xSrxFeCoO6 for chemical looping steam methane reforming".APPLIED ENERGY 197(2017):393-404.
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