ID 109878
Author
Ehiro, Takuya Department of Chemical Science and Technology, Tokushima University
Itagaki, Ai Department of Chemical Science and Technology, Tokushima University
Misu, Hisanobu Department of Chemical Science and Technology, Tokushima University
Nakagawa, Keizo Department of Advanced Materials, Institute of Technology and Science, Tokushima University|Department of Resource Circulation Engineering, Center for Frontier Research of Engineering, Tokushima University KAKEN Search Researchers
Katoh, Masahiro Department of Advanced Materials, Institute of Technology and Science, Tokushima University Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Katou, Yuuki Otake Research Laboratories, Mitsubishi Rayon Co. Ltd.
Ninomiya, Wataru Otake Research Laboratories, Mitsubishi Rayon Co. Ltd.
Sugiyama, Shigeru Department of Advanced Materials, Institute of Technology and Science, Tokushima University|Department of Resource Circulation Engineering, Center for Frontier Research of Engineering, Tokushima University Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Keywords
Oxidative Dehydrogenation
Isobutane
MCM-41
Acid Treatment
Template Ion Exchange
Content Type
Journal Article
Description
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.
Journal Title
Journal of Chemical Engineering of Japan
ISSN
00219592
NCID
AA00709658
Volume
49
Issue
2
Start Page
152
End Page
160
Sort Key
152
Published Date
2016
Remark
Copyright © 2016 The Society of Chemical Engineers, Japan
EDB ID
Published Source
Journal of Chemical Engineering of Japan (2016) Vol.49 No.2 p.152-160 (doi: 10.1252/jcej.15we155)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Author
departments
Science and Technology