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Three-dimensionally ordered macroporous LaFeO3 perovskites for chemical-looping steam reforming of methane
Zhao, Kun1,2; He, Fang1; Huang, Zhen1; Zheng, Anqing1; Li, Haibin1; Zhao, Zengli1
2014-02-25
发表期刊INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷号39期号:7页码:3243-3252
摘要Three-dimensionally ordered macroporous (3DOM) LaFeO3 and nano-LaFeO3 perovskitetype oxides were synthesized by impregnation of polystyrene (PS) templates and combustion method, respectively. The obtained LaFeO3 perovskites were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer Emmett Teller (BET) surface area, and hydrogen-temperature programmed reduction (H-2-TPR). The performance of the perovsldtes as oxygen carriers in chemical looping steam methane reforming (CL-SMR) to produce syngas (H-2 + CO) and hydrogen were investigated. The synthesized 3DOM-LaFeO3 was pure crystalline perovskite giving a surface area of 8.088 m(2)/g, higher than that of nano-LaFeO3 particles (4.323 m(2)/g). In the methane reduction stage, methane was partially oxidized into syngas at a H-2/CO molar ratio close to 2:1 by the 3DOM-LaFeO3 in the main stage of the reactions. In the steam oxidation stage, the reduced perovskites were oxidized by steam to generate hydrogen simultaneously. No significant decrease of the yields of syngas and hydrogen was observed during ten successive redox cycles, indicating that the 3DOM-LaFeO3 perovskites have good repeatability. In comparison to nano-LaFeO3, 3DOM-LaFeO3 has more stable reactivity of methane oxidation and better resistance to carbon formation. In spite of a part of 3DOM structure were collapsed in the course of the cyclic reactions, the specific surface area of the 3DOMLaFeO(3) was still higher than that of the nano one. The better reactivity of 3DOM-LaFeO3 compared with that of nano-LaFeO3 is partially attributed to the higher surface area. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
文章类型Article
关键词3dom Perovskite Chemical-looping Steam Methane Reforming Syngas Hydrogen
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1016/j.ijhydene.2013.12.046
研究领域[WOS]Chemistry ; Electrochemistry ; Energy & Fuels
关键词[WOS]HYDROGEN-PRODUCTION ; OXYGEN CARRIERS ; COMBUSTION ; PERFORMANCE ; CRYSTAL ; OXIDES ; TECHNOLOGIES ; CATALYST ; CO
收录类别SCI
语种英语
WOS类目Chemistry, Physical ; Electrochemistry ; Energy & Fuels
WOS记录号WOS:000331917400021
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10679
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, CAS Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Zhao, Kun,He, Fang,Huang, Zhen,et al. Three-dimensionally ordered macroporous LaFeO3 perovskites for chemical-looping steam reforming of methane[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2014,39(7):3243-3252.
APA Zhao, Kun,He, Fang,Huang, Zhen,Zheng, Anqing,Li, Haibin,&Zhao, Zengli.(2014).Three-dimensionally ordered macroporous LaFeO3 perovskites for chemical-looping steam reforming of methane.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,39(7),3243-3252.
MLA Zhao, Kun,et al."Three-dimensionally ordered macroporous LaFeO3 perovskites for chemical-looping steam reforming of methane".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 39.7(2014):3243-3252.
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