Co-production of syngas and H-2 from chemical looping steam reforming of methane over anti-coking CeO2/La0.9Sr0.1Fe1-xNixO3 composite oxides

doi:10.1016/j.fuel.2022.123455

GIEC OpenIR

	Co-production of syngas and H-2 from chemical looping steam reforming of methane over anti-coking CeO2/La0.9Sr0.1Fe1-xNixO3 composite oxides
	Zhao, Kun1,2,3 ; Fang, Xiaojie 4; Cui, Chaoxian 1,2,3; Kang, Shunshun 1,2,3; Zheng, Anqing1,2,3 ; Zhao, Zengli1,2,3
	2022-06-01
发表期刊	FUEL
ISSN	0016-2361
卷号	317 页码:10
通讯作者	Zheng, Anqing(zhengaq@ms.giec.ac.cn)
摘要	Chemical looping steam reforming of methane (CL-SRM) is a novel process for the co-production of syngas and hydrogen without an additional purification process. However, the high activity of oxygen carriers is always accompanied by severe carbon deposition via the catalytic cracking of methane, which can result in the rapid deactivation of oxygen carriers and the production of low purity hydrogen. Herein, a series of novel composite oxide carriers of CeO2/La0.9Sr0.1Fe1-xNixO3 with varying doping ratios of Ni are developed to achieve selective and stable production of syngas and H-2. The redox performance of CeO2/La0.9Sr0.1Fe1-xNixO3 was evaluated in a fixed bed reactor coupling with various analytical methods. It is found that the Ni doping ratio of 0.2 can significantly enhance the performance and stability of CeO2/La0.9Sr0.1Fe1-xNixO3. It is speculated that the proper doping ratio of Ni can simultaneously improve the surface lattice oxygen vacancies and the lattice oxygen migration rate. The CH4 reforming over CeO2/La0.9Sr0.1Fe0.8Ni0.2O3 displays a very stable performance while avoiding obvious carbon deposition within 20 min, in which, the CH4 conversion, H-2 selectivity, and CO selectivity achieve 85%, 96%, and 88%, respectively. The yield of H-2 (>95% purity) reaches 23 mL/min in the subsequent steam oxidation of reduced CeO2/CeO2/La0.9Sr0.1Fe0.8Ni0.2O3. Its lattice oxygen can be completely recovered by the final air oxygenation. The CeO2/La0.9Sr0.1Fe0.8Ni0.2O3 exhibits high reactivity and stability in 10 redox cycles at 850 degrees C. These results demonstrate that the doping of Ni affords an efficient manner to regulate the lattice oxygen migration rate of perovskite oxides to match the surface reaction rate, thereby avoiding the deep reduction of surface metal ions within perovskite oxides and resulting carbon depositions during CL-SRM.
关键词	Methane Chemical looping Steam reforming Carbon deposits Oxygen carrier Perovskite
DOI	10.1016/j.fuel.2022.123455
关键词[WOS]	PEROVSKITE-TYPE OXIDES ; PARTIAL OXIDATION ; OXYGEN CARRIERS ; COMBUSTION ; HYDROGEN ; PERFORMANCE ; CATALYSIS ; REACTOR
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51876205] ; National Natural Science Foundation of China[51776209] ; Youth Inno-vation Promotion Association, CAS[2019341] ; Youth Inno-vation Promotion Association, CAS[2018383]
WOS研究方向	Energy & Fuels ; Engineering
项目资助者	National Natural Science Foundation of China ; Youth Inno-vation Promotion Association, CAS
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000783878300004
出版者	ELSEVIER SCI LTD
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/36249
专题	中国科学院广州能源研究所
通讯作者	Zheng, Anqing
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 4.Nanjing Univ Sci Technol, Sch Chem Engn, Nanjing 210094, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Zhao, Kun,Fang, Xiaojie,Cui, Chaoxian,et al. Co-production of syngas and H-2 from chemical looping steam reforming of methane over anti-coking CeO2/La0.9Sr0.1Fe1-xNixO3 composite oxides[J]. FUEL,2022,317:10.
APA	Zhao, Kun,Fang, Xiaojie,Cui, Chaoxian,Kang, Shunshun,Zheng, Anqing,&Zhao, Zengli.(2022).Co-production of syngas and H-2 from chemical looping steam reforming of methane over anti-coking CeO2/La0.9Sr0.1Fe1-xNixO3 composite oxides.FUEL,317,10.
MLA	Zhao, Kun,et al."Co-production of syngas and H-2 from chemical looping steam reforming of methane over anti-coking CeO2/La0.9Sr0.1Fe1-xNixO3 composite oxides".FUEL 317(2022):10.