Microstructure and reactivity evolution of La-Fe-Al oxygen carrier for syngas production via chemical looping CH4-CO2 reforming

doi:10.1016/j.ijhydene.2017.10.037

	Microstructure and reactivity evolution of La-Fe-Al oxygen carrier for syngas production via chemical looping CH4-CO2 reforming
	Liu, Weiwei 1; Xue, Peng 1; Tian, Ming 2; Wang, Xiaodong 2; Ma, Xiaoxun 1; Zhang, Tao 2; Zhu, Yanyan 1,2; Sun, Xueyan 1
刊名	INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
	2017-12-28
卷号	42 期号:52 页码:30509-30524
关键词	Chemical Looping Reforming Syngas Oxygen Carrier Hexaaluminate Perovskite
ISSN号	0360-3199
DOI	10.1016/j.ijhydene.2017.10.037
文献子类	Article
英文摘要	The 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.
WOS关键词	METHANE PARTIAL OXIDATION ; PEROVSKITE-TYPE OXIDES ; SHELL REDOX CATALYST ; SYNTHESIS GAS ; BARIUM HEXAALUMINATE ; HYDROGEN-PRODUCTION ; CO2 UTILIZATION ; LATTICE OXYGEN ; BETA-ALUMINA ; IRON-OXIDE
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000418987800004
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/169182]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Wang, Xiaodong
作者单位	1.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
推荐引用方式 GB/T 7714	Liu, Weiwei,Xue, Peng,Tian, Ming,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	Liu, Weiwei.,Xue, Peng.,Tian, Ming.,Wang, Xiaodong.,Ma, Xiaoxun.,...&Sun, Xueyan.(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	Liu, Weiwei,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.