Chemical looping co-conversion of CH4 and CO2 using Fe2O3/Al2O3 pellets as both oxygen carrier and catalyst in a fluidized bed reactor

doi:10.1016/j.cej.2021.132133

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	Chemical looping co-conversion of CH4 and CO2 using Fe2O3/Al2O3 pellets as both oxygen carrier and catalyst in a fluidized bed reactor
	Zhou, Zhihao 1; Deng, Guoshu 2; Li, Lin 1; Liu, Xue 1,3; Sun, Zhenkun 1; Duan, Lunbo 1
刊名	Chemical Engineering Journal
	2022-01-15
卷号	428
关键词	Aluminum compounds Catalysts Chemical reactors Fluid catalytic cracking Fluidized beds Hematite Oxidation Oxygen Pelletizing Synthesis gas Transition metal oxides Transition metals CH 4 CH 4 reforming Chemical-looping reforming Dry-methane reforming Feed gas Inhibition effect Oxygen Carrier Syn gas Syngas production ]+ catalyst
ISSN号	13858947
DOI	10.1016/j.cej.2021.132133
英文摘要	Chemical looping reforming of CH4 (CH4-CLR) is a safe and efficient CH4 upgrading technology for syngas production. The Fe2O3-based oxygen carriers (OCs) possess a higher potential for CH4-CLR among so many transition metal oxides as high syngas selectivity can be obtained from partial CH4 oxidation by OCs with the step-by-step reduction of Fe3+/Fe2+ to Fe0. However, the impurity CO2 in CH4-source feed gas, when using Fe2O3-based OCs, often causes the inhibition of reaction between CH4 and OCs resulting in no partial CH4 oxidation to syngas. The present work has employed the Fe2O3/Al2O3 pellets as OCs with introducing the fully reduced same pellets as a catalyst in a bubbling fluidized-bed reactor to eliminate the inhibition effect of CO2 during CH4-CLR. It has been demonstrated that the Fe species with low valent, e.g., Fe0, in the catalyst can effectively catalyze the dry CH4 reforming. Thus, the CO2 has been consumed before contacting with Fe2O3-based OCs and the inhibition effect of CO2 has been eliminated. Meanwhile, both CO2 and CH4 can be converted to syngas in the reducer leading to an opportunity for CO2 utilization. With the help of the catalyst of reduced OCs, not only the CO2 in the feed gas but also that formed from full CH4 oxidation by Fe2O3/Al2O3 at the early CH4 reforming stage is converted into syngas of CO and H2. Semi-continuous cyclic CH4-CLR test has demonstrated the good stability of both Fe2O3/Al2O3 OC and counterpart catalyst, which suggests the potential of such OC/catalyst pair in practical applications. © 2021 Elsevier B.V.
WOS研究方向	Engineering
语种	英语
出版者	Elsevier B.V.
WOS记录号	WOS:000711746300004
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151140]
专题	石油化工学院
作者单位	1.Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing; 210096, China; 2.School of Engineering, University of Glasgow, Glasgow; G12 8QQ, United Kingdom; 3.Department of Safety Engineering, School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhou, Zhihao,Deng, Guoshu,Li, Lin,et al. Chemical looping co-conversion of CH4 and CO2 using Fe2O3/Al2O3 pellets as both oxygen carrier and catalyst in a fluidized bed reactor[J]. Chemical Engineering Journal,2022,428.
APA	Zhou, Zhihao,Deng, Guoshu,Li, Lin,Liu, Xue,Sun, Zhenkun,&Duan, Lunbo.(2022).Chemical looping co-conversion of CH4 and CO2 using Fe2O3/Al2O3 pellets as both oxygen carrier and catalyst in a fluidized bed reactor.Chemical Engineering Journal,428.
MLA	Zhou, Zhihao,et al."Chemical looping co-conversion of CH4 and CO2 using Fe2O3/Al2O3 pellets as both oxygen carrier and catalyst in a fluidized bed reactor".Chemical Engineering Journal 428(2022).