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Manganese promoting effects on the Co-Ce-Zr-O-x nano catalysts for methane dry reforming with carbon dioxide to hydrogen and carbon monoxide
Wang, Ning1; Chu, Wei1; Zhang, Tao2; Zhao, Xiu-Song3
关键词Nano Cobalt-composite Catalyst Mn Doping Ceo2-zro2 Oxygen Mobility Methane Dry Reforming With Co2 High Catalytic Performance
刊名CHEMICAL ENGINEERING JOURNAL
2011-06-01
DOI10.1016/j.cej.2010.12.042
170期:2-3页:457-463
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Technology
类目[WOS]Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]Engineering
关键词[WOS]CEO2-ZRO2 SOLID-SOLUTIONS ; OXYGEN STORAGE CAPACITY ; SYNTHESIS GAS ; OXIDE CATALYSTS ; REDOX BEHAVIOR ; CERIA-ZIRCONIA ; CE/ZR RATIO ; REDUCTION ; OXIDATION ; SURFACE
英文摘要The Mn doping nanocrystalline Co-Ce-Zr-O-x catalysts were prepared by the co-precipitation method and characterized by various physico-chemical characterization techniques such as X-ray diffraction (XRD), temperature- programmed reduction (TPR), O-2 temperature-programmed desorption (O-2-TPD). X-ray photoelectron spectroscopy (XPS) and temperature-programmed hydrogenation (TPH). Their catalytic performances for methane reforming with CO2 to hydrogen and carbon monoxide were investigated. Adding Mn remarkably enhanced the catalytic activity and stability of the Co-Ce-Zr-O-x catalyst. The highest catalytic activity and long-term stability was obtained when the molar ratio of Mn/(Ce + Zr + Mn) was 10%. The improved catalytic behavior was closely related to the surface oxygen species and oxygen mobility. In comparison with that of Co-Ce-Zr-O-x catalyst, the migration of bulk lattice oxygen species became easier, and the content of surface oxygen species was higher for the Mn-doped nanocrystalline Co-Ce-Zr-O-x samples. TPH characterization showed that the surface coke species could be easily oxidized into COx for the Mn-doped nano cobalt-composite catalyst due to the higher amount of mobile oxygen. The Mn incorporation promoted the dispersion of the nano-sized CoOx crystallites. In comparison with the impregnated samples, CoOx species dispersed better in the co-precipitated catalysts. (C) 2011 Published by Elsevier B.V.
语种英语
WOS记录号WOS:000292947200014
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142598
专题中国科学院大连化学物理研究所
作者单位1.Sichuan Univ, Dept Chem Engn, Chengdu 610065, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
3.Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117576, Singapore
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Wang, Ning,Chu, Wei,Zhang, Tao,et al. Manganese promoting effects on the Co-Ce-Zr-O-x nano catalysts for methane dry reforming with carbon dioxide to hydrogen and carbon monoxide[J]. CHEMICAL ENGINEERING JOURNAL,2011,170(2-3):457-463.
APA Wang, Ning,Chu, Wei,Zhang, Tao,&Zhao, Xiu-Song.(2011).Manganese promoting effects on the Co-Ce-Zr-O-x nano catalysts for methane dry reforming with carbon dioxide to hydrogen and carbon monoxide.CHEMICAL ENGINEERING JOURNAL,170(2-3),457-463.
MLA Wang, Ning,et al."Manganese promoting effects on the Co-Ce-Zr-O-x nano catalysts for methane dry reforming with carbon dioxide to hydrogen and carbon monoxide".CHEMICAL ENGINEERING JOURNAL 170.2-3(2011):457-463.
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