JOURNAL OF CHEMICAL ENGINEERING OF JAPAN | |
Effects of Acid Treatment on the Acidic Properties and Catalytic Activity of MCM-41 for the Oxidative Dehydrogenation of Isobutane | |
Yuuki Katou2  Keizo Nakagawa1  Hisanobu Misu3  Ai Itagaki3  Wataru Ninomiya2  Masahiro Katoh1  Shigeru Sugiyama1  Takuya Ehiro3  | |
[1] Department of Advanced Materials, Institute of Technology and Science, Tokushima University;Otake Research Laboratories, Mitsubishi Rayon Co., Ltd.;Department of Chemical Science and Technology, Tokushima University | |
关键词: Oxidative Dehydrogenation; Isobutane; MCM-41; Acid Treatment; Template Ion Exchange; | |
DOI : 10.1252/jcej.15we155 | |
来源: Maruzen Company Ltd | |
【 摘 要 】
References(24)Mesoporous silicas have shown promise as materials for solid catalysts or catalyst supports due to their unique characteristics. Metal-doped mesoporous silicas are known to be catalytically active in the oxidative dehydrogenation (ODH) of isobutane. However, heavy-metal-free mesoporous silicas have not been studied closely for their use as catalysts. In the present study, MCM-41 (#41 Mobil composition of matter) was acid-treated to enhance its catalytic activity, although pure MCM-41 was confirmed as catalytically inactive for the ODH of isobutane (isobutene yield=0.9%). The pH of a slurry of as-synthesized MCM-41 was changed during acid treatment. A pH adjustment to 6.5 resulted in great improvement in catalytic activity (isobutene yield=6.1%), but a pH adjustment to 4.5 resulted in insufficient improvement (isobutene yield=4.5%). It was confirmed via XRD and N2 adsorption-desorption measurement that the pH adjustment to 4.5 degraded the ordered structure of MCM-41. This degradation would be a crucial factor that would render acid treatment less effective. In addition to the acid treatment, Al doping to MCM-41 was conducted. Al doping also greatly enhanced the acidity and catalytic activity of MCM-41.
【 授权许可】
Unknown
【 预 览 】
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RO201912080697356ZK.pdf | 19KB | download |