Increase in Concentration and Strength of Acidic Catalytic Sites on Sulfated Zirconia by Doping with Silica
✍ Scribed by S. Tajammul HUSSAIN; Muhammad MAZHAR; Sheraz GUL
- Book ID
- 104452743
- Publisher
- Elsevier Science
- Year
- 2007
- Weight
- 334 KB
- Volume
- 28
- Category
- Article
- ISSN
- 1872-2067
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✦ Synopsis
Doping sulfated zirconia with silica increases the acidity of the sulfated zirconia. This modified catalyst was used for liquid-phase dehydration of methanol at 413-453 K as a model reaction. Methanol is sequentially dehydrated to dimethyl ether and ethylene over both sulfated zirconia and silica-doped sulfated zirconia in a single step. Also, significant amounts of propylene are formed by the silica-doped catalyst but not by the undoped catalyst. The data were discussed in relation to increased acid active sites after doping with silica, which electronically modified the catalyst surface.