Oxidative Dehydrogenation of Isobutane to Isobutene on Metal-Doped MCM-41 Catalysts

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Masashi Kurashina³  Yuuki Katou²  Keizo Nakagawa¹  Hisanobu Misu⁴  Ai Itagaki⁴  Wataru Ninomiya²  Masahiro Katoh¹  Shigeru Sugiyama¹  Takuya Ehiro⁴ 

[1] Department of Advanced Materials, Institute of Technology and Science, Tokushima University;Otake Research Laboratories, Mitsubishi Rayon Co., Ltd.;Department of Life System, Institute of Technology and Science, Tokushima University;Department of Chemical Science and Technology, Tokushima University

关键词: Oxidative Dehydrogenation;    Isobutane;    Isobutene;    MCM-41;    Metal-Doping;   

DOI  :  10.1252/jcej.15we106

来源: Maruzen Company Ltd

【 摘 要 】

References(27)Cited-By(1)MCM-41 (#41 Mobil Composition of Matter) is a favorable material for heterogeneous reactions because of its unique porous structure. However, the catalytic activity of MCM-41 for the oxidative dehydrogenation (ODH) of isobutane to isobutene is known to be quite low. In the present study, a metal-doping method was employed to improve this catalytic activity. Doping of Cr, Co, Ni, or Mo into MCM-41 resulted in a great improvement in the catalytic activity. Since chromium-doped MCM-41 (Cr-MCM-41) showed the greatest catalytic activity among these catalysts, its redox property was further analyzed via XPS, XAFS and H2-TPR techniques. The XPS spectrum of Cr-MCM-41 suggested that it has Cr3+ and Cr6+ species on its surface. Also, a pre-edge peak due to Cr6+ species was confirmed in the XANES spectrum of Cr-MCM-41. In H2-TPR measurement, Cr-MCM-41 was more reducible than crystalline Cr2O3, which showed low catalytic activity for the ODH of isobutane. The reducible Cr6+ species on Cr-MCM-41 contributed to an improvement in the catalytic activity of MCM-41.

【 授权许可】

Unknown