Issue 5, 2001
From the journal:

Physical Chemistry Chemical Physics

Variations in structure and acidity of silica–alumina during steaming process

Satoshi Sato,*a   Ryoji Takahashi,a   Toshiaki Sodesawa,a   Chieko Kobayashi,a   Akira Miuraa  and  Katsuyuki Oguraa  

* Corresponding authors

a Department of Materials Technology, Faculty of Engineering, Chiba Uniersity, Yayoi, Inage, Chiba, Japan
E-mail: satoshi@tc.chiba-u.ac.jp

Abstract

A supported type of silica–alumina catalyst prepared by depositing alumina on silica was treated under steaming conditions. Physical properties of the silica–alumina were characterized by the N2 adsorption–desorption isotherm, small-angle X-ray scattering and solid-state NMR measurements. The particle size and the mean pore size increased slightly with increasing steam pressure up to 2.0 MPa. The specific surface area of the silica–alumina steamed at 2.0 MPa was half of that before steaming. The number of four-coordinate Al ions increased with increasing steam pressure and was saturated at a steam pressure of 0.5 MPa. Temperature-programmed desorption of chemisorbed 2,6-dimethylpyridine elucidated that the number of Brönsted acid sites is maximized at 0.5 MPa.

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Article information

DOI
https://doi.org/10.1039/B009102M
Article type
Paper
Submitted
13 Nov 2000
Accepted
08 Jan 2001
First published
09 Feb 2001

Phys. Chem. Chem. Phys., 2001,3, 885-890

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Variations in structure and acidity of silica–alumina during steaming process

S. Sato, R. Takahashi, T. Sodesawa, C. Kobayashi, A. Miura and K. Ogura, Phys. Chem. Chem. Phys., 2001, 3, 885 DOI: 10.1039/B009102M

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