Collect. Czech. Chem. Commun. 1994, 59, 820-832

Surface Studies and Nature of Active Sites of Supported Heteropolyacids as Catalysts in Methanol Dehydration

Amin Anwar, Ali Abdel-Ghaffar, Sameh Aboul-Fotouh and Ebeid Fikry

Department of Chemistry, Faculty of Education, Roxy, Cairo, Egypt


Different amounts of molybdo- and tungstophosphoric acids were supported on α-Al2O3 to get information about their surface and catalytic properties. The surface study revealed that surface area, total pore volume and the mean pore radius decreased as the acid content increased. X-Ray diffraction analysis showed that there is no interaction between the acid and α-Al2O3. Using a continuous flow system, methanol transformation was carried out under atmospheric pressure. Some experiments were made to determine the nature of active centers and reaction mechanism.