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Enhanced Chemical looping oxidative coupling of methane by Na-doped LaMnO3 redox catalysts
Jiang, Shican1,2,3,4; Ding, Weixiao1,2,3,4; Zhao, Kun2,3,4; Huang, Zhen2,3,4; Wei, Guoqiang2,3,4; Feng, Yanyan1; Lv, Yijv1; He, Fang1
2021-09-01
Source PublicationFUEL
ISSN0016-2361
Volume299Pages:12
Corresponding AuthorZhao, Kun(zhaokun@ms.giec.ac.cn) ; He, Fang(hefang@glut.edu.cn)
AbstractChemical looping oxidative coupling of methane (CLOCM) describes an energy-saving and redox approach to convert methane into C-2 products, which utilizes lattice oxygen in redox catalysts in place of molecular oxygen, to facilitate the oxidative coupling of methane reaction. This study synthesized a series of alkali Na-doping LaMnO3 as the redox catalysts for chemical looping oxidative coupling of methane. Incorporation of Na into LaMnO3 lattice induced the higher molar ratio of Mn4+/Mn3+ and more oxygen vacancies, which would be correlated to defects inside the material lattice and consequently promote the redox performance of Mn-based oxygen carriers. Characterizations and consecutive pulse tests showed that the surface oxygen species would be the active center for the methane activation, while a kind of un-fully reduced lattice oxygen (O alpha-, 0 < alpha < 2) caused by the doping of Na benefits the methane oxidative coupling reaction to form C-2 hydrocarbons. Among all the samples, 018Na-doped redox catalysts exhibited the highest C-2 product yield and 7.44 times increase in C-2 yield can be obtained compared to the un-doped LaMnO3. Good regenerability of 018Na-LaMnO3 was demonstrated through 20 consecutive cyclic redox tests, exhibiting above 30% methane conversion, similar to 55% C-2 product selectivity and 20% of C-2 hydrocarbon yield, which will substantially provide a screening strategy for oxygen carrier with good recyclability.
KeywordMethane Oxidative coupling of methane Lattice oxygen Chemical looping Selective oxidation
DOI10.1016/j.fuel.2021.120932
WOS KeywordOXIDE CATALYSTS ; PERFORMANCE ; COMBUSTION ; CONVERSION ; MG ; LI ; MN-NA2WO4/SIO2 ; SELECTIVITY ; CHEMISTRY ; MECHANISM
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51876205] ; Pearl River S&T Nova Program of Guangzhou[201906010092] ; National Key Research and Development Program of China[2017YFE0105500] ; Science & Technology Research Project of Guangdong Province[2017A020216009] ; Youth Innovation Promotion Association, CAS[2019341] ; Guangxi Natural Science Foundation[2018GXNSFDA281005] ; Guilin University of Technology[GLUTQD2018027]
WOS Research AreaEnergy & Fuels ; Engineering
Funding OrganizationNational Natural Science Foundation of China ; Pearl River S&T Nova Program of Guangzhou ; National Key Research and Development Program of China ; Science & Technology Research Project of Guangdong Province ; Youth Innovation Promotion Association, CAS ; Guangxi Natural Science Foundation ; Guilin University of Technology
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000652639800003
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/33099
Collection中国科学院广州能源研究所
Corresponding AuthorZhao, Kun; He, Fang
Affiliation1.Guilin Univ Technol, Coll Chem & Bioengn, Guilin 541006, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
3.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China
4.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Jiang, Shican,Ding, Weixiao,Zhao, Kun,et al. Enhanced Chemical looping oxidative coupling of methane by Na-doped LaMnO3 redox catalysts[J]. FUEL,2021,299:12.
APA Jiang, Shican.,Ding, Weixiao.,Zhao, Kun.,Huang, Zhen.,Wei, Guoqiang.,...&He, Fang.(2021).Enhanced Chemical looping oxidative coupling of methane by Na-doped LaMnO3 redox catalysts.FUEL,299,12.
MLA Jiang, Shican,et al."Enhanced Chemical looping oxidative coupling of methane by Na-doped LaMnO3 redox catalysts".FUEL 299(2021):12.
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