| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 77141 | Microporous and Mesoporous Materials | 2007 | 8 Pages |
Abstract
Acid catalyzed hydration of α-pinene in the presence of water was conducted over MFI, BEA, MOR and FAU type zeolites with various SiO2/Al2O3 molar ratios and over many other catalysts. Except for MFI, the catalytic activity of all zeolites increased and, then, fell down with increasing SiO2/Al2O3 ratio. Analysis of water adsorption isotherm and NH3-TPD revealed explicitly that, at high Al content, the crowded water molecules on an acid site inhibit the adsorption of α-pinene while, at low Al content, only a small number of water are competing with α-pinene to adsorb on an active site. The catalytic activity per acid site of all zeolites increased monotonously with increasing hydrophobicity.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Takako Mochida, Ryuichiro Ohnishi, Naoto Horita, Yuichi Kamiya, Toshio Okuhara,