Influence of Counter Cation on the Thermal Stability,the Acidity and the Catalytic Properties in the Dehydration of Tert-Butanol over 12-Molybdophosphates

Abstract

with silver and ammonium form high surface area solids, as compared to copper and aluminum salts. The number of weakly or moderately strong acidic sites remains relatively unchanged with pretreatment temperature to 673 K. All catalysts are highly selective to produce isobutene which is predominate product. Isobutene formation is zero order reaction independent of the partial pressure of tert-butanol. This revealed that the dehydration reaction proceeded on the surface of solid catalysts (a surface-type reaction). In this case, the catalytic activities were determined by the concentration of protons on the catalyst surface and hence on the surface acidity.