| Self-sustained combustion of CO with transient changes and reaction mechanism over CuCe0.75Zr0.25O delta powder for honeycomb ceramic catalyst | |
Kang RN(康润宁)1,2 ; Wei XL(魏小林)1,2,3; Ma PD(马盼东)1,4; Bin F(宾峰)1,3; He JY1,5; Hao QL4; Dou BJ4
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| Corresponding Author | Bin, Feng([email protected]) ; Dou, Baojuan([email protected]) |
| Source Publication | FUEL
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| 2020-03-01 | |
| Volume | 263Pages:9 |
| ISSN | 0016-2361 |
| Abstract | A CuCe0.75Zr0.25O delta catalyst was prepared by the sol-gel method and successfully coated on honeycomb ceramic (HC) carrier. The activity of CuCe0.75Zr0.25O delta/HC was determined by the CO-TPO + FLIR, with the results performing that the critical condition for CO self-sustained combustion is 3 vol% CO + 3 vol% O-2/N-2 at 0.5 L/min. As the CO concentration increases from 1 vol% CO to 3 vol% CO, the induction process (< T-15) shifts toward a slower CO conversion, while the light-off process (> T-15) shifts to rapid ignition with a transient change for the CO oxidation reaction. The furnace temperature for CO self-sustained combustion decreases with increasing the CO and O-2 concentrations. Upon increasing the CO2 concentration, however, furnace temperature is needed to increase and realize CO complete conversion. The thermal stability test combined with SEM + EDX results indicate that the CuCe0.75Zr0.25O delta/HC retains an excellent thermal stability after a 200 h, and the high-temperature region remains at 225 +/- 1 degrees C during the CO self-combustion reaction. The activity of catalyst is reduced slightly after the 200 h test because of the carbon deposition on the catalyst surface, but such a slight deactivation can be eliminated by the air oxidation method. In situ IR results show a competitive adsorption of CO/O-2 and CO2 on the Cu-Ce active sites, indicating that the addition of gaseous CO2 performs an inhibition of CO oxidation. CO preferentially adsorbs linearly at Cu+ sites to form carbonyls that react with lattice oxygen to produce CO2 to release, which can be ascribed to M-K mechanism. The L-H mechanism is less important, which involves the relatively weak reaction of adsorbed CO and adsorbed oxygen on the Cu-Ce active sites to form carbonate species. |
| Keyword | CuCe0.75Zr0.25O delta honeycomb catalyst Carbon monoxide Self-sustained combustion Reactant concentration Transient changes Competitive adsorption |
| DOI | 10.1016/j.fuel.2019.116637 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000504834400111 |
| WOS Keyword | CUO-CEO2 CATALYSTS ; CARBON-MONOXIDE ; OXIDATION ; OXIDE ; PERFORMANCE ; PLATINUM ; CEO2 |
| WOS Research Area | Energy & Fuels ; Engineering |
| WOS Subject | Energy & Fuels ; Engineering, Chemical |
| Funding Project | National Natural Science Foundation of China[51776216] ; National Natural Science Foundation of China[51736010] ; Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences[XDA21040500] |
| Funding Organization | National Natural Science Foundation of China ; Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Bin, Feng ; Dou, Baojuan |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/81590 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China; 4.Tianjin Univ Sci & Technol, Coll Marine & Environm Sci, Tianjin 300457, Peoples R China; 5.Xi An Jiao Tong Univ, Sch Energy & Power Engn, Xian 710049, Shaanxi, Peoples R China |
| Recommended Citation GB/T 7714 | Kang RN,Wei XL,Ma PD,et al. Self-sustained combustion of CO with transient changes and reaction mechanism over CuCe0.75Zr0.25O delta powder for honeycomb ceramic catalyst[J]. FUEL,2020,263:9.Rp_Au:Bin, Feng, Dou, Baojuan |
| APA | 康润宁.,魏小林.,马盼东.,宾峰.,He JY.,...&Dou BJ.(2020).Self-sustained combustion of CO with transient changes and reaction mechanism over CuCe0.75Zr0.25O delta powder for honeycomb ceramic catalyst.FUEL,263,9. |
| MLA | 康润宁,et al."Self-sustained combustion of CO with transient changes and reaction mechanism over CuCe0.75Zr0.25O delta powder for honeycomb ceramic catalyst".FUEL 263(2020):9. |
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| Jp2020020A.pdf（2753KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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