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Synergistic improvements in stability and performance of the double perovskite-type oxides La2-xSrxFeCoO6 for chemical looping steam methane reforming

文献类型：期刊论文

作者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
刊名APPLIED ENERGY
出版日期2017-07-01
卷号197页码:393-404
关键词Chemical Looping Methane Reforming Double Perovskite Synergistic Effect Oxygen Vacancy
DOI10.1016/j.apenergy.2017.04.049
文献子类Article
英文摘要Chemical 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.
WOS关键词OXYGEN UNCOUPLING CLOU ; SHELL REDOX CATALYST ; FE MIXED OXIDES ; HYDROGEN-PRODUCTION ; PARTIAL OXIDATION ; CO2 CAPTURE ; COMBUSTION ; CARRIERS ; SYNGAS ; SR
语种英语
WOS记录号WOS:000401594300032
资助机构National 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)
源URL[http://ir.giec.ac.cn/handle/344007/14120]  
专题中国科学院广州能源研究所
作者单位1.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
推荐引用方式
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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来源：广州能源研究所

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