Tungstate promoted CaMnO3-based core-shell redox catalysts for efficient chemical looping oxidative coupling of methane
文献类型：期刊论文
| 作者 | Zhao, Kun1,3,4,5; Huang, Ju1,3,4; Huang, Zhen1,3,4,5; Lin, Yan1,3,4,5; Zheng, Min2; Liu, Anqi1,3,4,5; Wang, Xiaobo1,3,4,5; Song, Da1,4; Zheng, Anqing1,3,4,5; Zhao, Zengli1,3,4,5 |
| 刊名 | JOURNAL OF THE ENERGY INSTITUTE
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 105页码:273-281 |
| 关键词 | Chemical looping Oxidative coupling of methane Core -shell Selective oxygen species Olefins |
| ISSN号 | 1743-9671 |
| DOI | 10.1016/j.joei.2022.10.002 |
| 通讯作者 | Zheng, Anqing(zhengaq@ms.giec.ac.cn) |
| 英文摘要 | Chemical looping oxidative coupling of methane (CLOCM) provides a promising route for methane conversion to high-valued olefins, in which oxygen carriers serve as oxygen donors and catalysts to facilitate methane acti-vation and C-C coupling reactions. Herein, the perovskite CaMnO3 was used as the oxygen carrier for CLOCM due to the high catalytic activity of Mn, and tungstate was selected to modify CaMnO3 for improving the C2 product selectivity. The results showed that CaMnO3 with 6% Na2WO4 doping exhibited the highest activity at 800 degrees C with a C2 yield of 15.5% and good redox stability for at least 30 cycles. The coexistence of Na2WO4 with CaMnO3 synergistically controlled the methane conversion and C-C coupling. Further characterizations indi-cated that the core-shell structure with the inner layer of CaMnO3 and the outer layer of Na2WO4 effectively regulated the oxygen release and transformation. Na2WO4 modification resulted in an obvious decrease of nonselective oxygen species which were prone to the deep oxidation of methane while leading to a great increase of O2-species that could selectively oxidize methane to C2 hydrocarbons. These findings provide guidance for dopant-induced regulation of oxygen vacancies and selective oxygen species in oxygen carriers for improving CLOCM performance. |
| WOS关键词 | DEHYDROGENATION ; PERFORMANCE ; ETHYLENE ; ETHANE |
| 资助项目 | National Natural Science Foundation of China[51876205] ; National Natural Science Foundation of China[22179027] ; National Natural Science Foundation of China[51866003] ; Youth Innovation Promotion Association, CAS[2019341] ; Guangxi Natural Science Foundation[2018GXNSFDA281005] ; R & D Project of Guilin University of Technology[GLUTQD2018027] ; Yunnan Basic Research Program Project[2019FB071] |
| WOS研究方向 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:000886548200001 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Guangxi Natural Science Foundation ; R & D Project of Guilin University of Technology ; Yunnan Basic Research Program Project |
| 源URL | [http://ir.giec.ac.cn/handle/344007/37896]  |
| 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.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 2.Kunming Univ Sci & Technol, State Key Lab Complex Met Resources Clean Utilizat, Kunming, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 4.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 5.Univ Sci & Technol China, Sch Energy Sci & Engn, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Kun,Huang, Ju,Huang, Zhen,et al. Tungstate promoted CaMnO3-based core-shell redox catalysts for efficient chemical looping oxidative coupling of methane[J]. JOURNAL OF THE ENERGY INSTITUTE,2022,105:273-281. |
| APA | Zhao, Kun.,Huang, Ju.,Huang, Zhen.,Lin, Yan.,Zheng, Min.,...&Zhao, Zengli.(2022).Tungstate promoted CaMnO3-based core-shell redox catalysts for efficient chemical looping oxidative coupling of methane.JOURNAL OF THE ENERGY INSTITUTE,105,273-281. |
| MLA | Zhao, Kun,et al."Tungstate promoted CaMnO3-based core-shell redox catalysts for efficient chemical looping oxidative coupling of methane".JOURNAL OF THE ENERGY INSTITUTE 105(2022):273-281. |
入库方式： OAI收割
来源：广州能源研究所
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