Sol-gel synthesis of ternary phosphate-ZrO2-SiO2 catalysts for alcohol dehydration

Citation
Q. Zhuang et Jm. Miller, Sol-gel synthesis of ternary phosphate-ZrO2-SiO2 catalysts for alcohol dehydration, CAN J CHEM, 79(8), 2001, pp. 1224-1228
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry
Journal title
CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE
ISSN journal
0008-4042 → ACNP
Volume
79
Issue
8
Year of publication
2001
Pages
1224 - 1228
Database
ISI
SICI code
0008-4042(200108)79:8<1224:SSOTPC>2.0.ZU;2-2
Abstract
Phosphate-ZrO2-Si2O catalysts were synthesized by sol-gel method using trib utyl phosphite, zirconium propoxide, and tetraethyl orthosilicate as precur sors. They were characterized by N-2 adsorption, P-31 CP MAS NMR, and DRIFT S. At lower P content, monomeric phosphates were formed on the surface of t he catalysts, which were mainly responsible for the isopropanol dehydration activity. At higher P content, polyphosphates were formed, and thus, the d ehydration activity decreased. An optimum P content for dehydration activit y was found to be at 10 mol%.