Journal of Molecular Catalysis A-Chemical, Vol.164, No.1-2, 217-223, 2000
Tungstate-modified aluminium phosphate - 1. Preparation, characterisation and catalytic activity towards alcohol and cumene conversion reactions
A series of tungstate-impregnated aluminium phosphate samples are prepared by varying the tungstate weight percent from 3 to 20 and characterised by XRD and Nz-adsorption-desorption method. Surface areas are found to decrease with increase in tungstate loading. However, tungstate-loaded samples exhibit an increasing trend in acidity and catalytic activity. The sample with 10 wt.% tungstate loading shows highest dehydration and dehydrogenation activity for isopropanol and cumene conversion, respectively. The low C-2(+) hydrocarbon selectivity indicates that the new acid sites formed due to tungstate impregnation is not strong enough to dehydrate methanol to hydrocarbons.