DICP OpenIR
Microstructure and reactivity evolution of La-Fe-Al oxygen carrier for syngas production via chemical looping CH4-CO2 reforming
Zhu, Yanyan1,2; Sun, Xueyan1; Liu, Weiwei1; Xue, Peng1; Tian, Ming2; Wang, Xiaodong2; Ma, Xiaoxun1; Zhang, Tao2
KeywordChemical Looping Reforming Syngas Oxygen Carrier Hexaaluminate Perovskite
Source PublicationINTERNATIONAL JOURNAL OF HYDROGEN ENERGY
2017-12-28
ISSN0360-3199
DOI10.1016/j.ijhydene.2017.10.037
Volume42Issue:52Pages:30509-30524
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Electrochemistry ; Energy & Fuels
WOS Research AreaChemistry ; Electrochemistry ; Energy & Fuels
WOS KeywordMETHANE PARTIAL OXIDATION ; PEROVSKITE-TYPE OXIDES ; SHELL REDOX CATALYST ; SYNTHESIS GAS ; BARIUM HEXAALUMINATE ; HYDROGEN-PRODUCTION ; CO2 UTILIZATION ; LATTICE OXYGEN ; BETA-ALUMINA ; IRON-OXIDE
AbstractThe relationship between chemical looping CH4-CO2 reforming performance and the microstructure of oxygen carrier (OC) is very important for the rational design of OC. In this paper, we studied the structural evolution of La-Fe-Al (LFA-t, t = 900-1200 degrees C) OCs as thermal treatment and ten periodic CH4/CO2 redox cycles, and correlated to their reactivity and stability for syngas production. Different calcination temperature brought about great discrepancy in phase composition of LFA OCs: LaFeO3, Fe2O3, and alpha-Al2O3 at 900 degrees C, LaFexAl1-xO3 and La-hexaaluminate at 1000 degrees C, and monophasic La-hexaaluminate at 1100-1200 degrees C. During the CH4/CO2 redox process, the repeated phase separation occurred over LFA-900 and LFA-1000 accompanied by the appearance of metallic Fe and FeAl2O4, which resulted in serious CH4 pyrolysis. La-hexaaluminate showed good phase stability during CH4/CO2 redox process via the charge compensation mechanism. The large hexaaluminate crystalline of LFA-1200 inhibited the oxygen transport from the bulk to surface, which led to carbon deposition. LFA-1100 hexaaluminate OC with moderate crystal size exhibited excellent reactivity and stability for producing syngas with desirable H-2/CO ratio (similar to 2) during ten CH4/CO2 redox cycles thanks to high oxygen mobility and the reservation of hexaaluminate structure during redox process. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Language英语
WOS IDWOS:000418987800004
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/169183
Collection中国科学院大连化学物理研究所
Corresponding AuthorWang, Xiaodong
Affiliation1.Northwest Univ, Sch Chem Engn, Xian 710069, Shaanxi, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Yanyan,Sun, Xueyan,Liu, Weiwei,et al. Microstructure and reactivity evolution of La-Fe-Al oxygen carrier for syngas production via chemical looping CH4-CO2 reforming[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2017,42(52):30509-30524.
APA Zhu, Yanyan.,Sun, Xueyan.,Liu, Weiwei.,Xue, Peng.,Tian, Ming.,...&Zhang, Tao.(2017).Microstructure and reactivity evolution of La-Fe-Al oxygen carrier for syngas production via chemical looping CH4-CO2 reforming.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,42(52),30509-30524.
MLA Zhu, Yanyan,et al."Microstructure and reactivity evolution of La-Fe-Al oxygen carrier for syngas production via chemical looping CH4-CO2 reforming".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 42.52(2017):30509-30524.
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