Mn-doped CeO2 Nanorod Supported Au Catalysts for Dehydrogenation of Ethane with CO2

Catalysts

Weiming Hua¹  Yinghong Yue¹  Zi Gao¹  Hongyao Guo¹  Tianqi Lei¹  Changxi Miao² 

[1] Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, China;Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China;

关键词: Ethane dehydrogenation;    Au catalyst;    Mn-doping;    CeO₂ nanorod;    CO₂;   

DOI  :  10.3390/catal9020119

来源: DOAJ

【 摘 要 】

Dehydrogenation of ethane to ethylene was investigated in the presence of CO₂ over Au catalyst supported on an Mn-doped ceria nanorod. The activity can be greatly enhanced by proper Mn doping. Mn was found to preferentially occupy defect sites or surface sites of ceria, resulting in the formation of extra oxide ions. Characterization results indicated that the reducible oxygen species related to ceria might play a vital role in the dehydrogenation. The addition of CO₂ improved the stability of the catalysts remarkably, since CO₂ can sustainably replenish the reducible oxygen species and eliminate the coke on the surface of the catalysts, which was proved by the H₂-TPR and Raman analysis of spent catalysts. An ethane conversion of 17.4% with an ethylene selectivity of 97.5% can be obtained after 44 h of reaction.

【 授权许可】

Unknown