The catalytic conversion (dehydration/dehydrogenation) of 2-propanol o
n a series of CrPO4-AlPO4 (CrAlP) catalysts, which were differently pr
epared and thermally treated at 773-1073 K, has been studied by microc
atalytic pulse reactor technique at different temperatures (473-573 K)
. Kinetic parameters for conversion of 2-propanol to propene have been
obtained by analysis of the data through the Bassett-Habgood equation
for first-order reaction processes. The influence of the reaction tem
perature upon alcohol conversion and product selectivities was also in
vestigated. Catalytic performance was affected by the precipitation ag
ent. Catalysts obtained in propylene oxide-aqueous ammonia showed the
highest activity towards propene compared to other catalysts. Calcinat
ion at increasing temperatures caused a decrease in the activity due t
o the decrease in surface acid character. The results of dehydration t
o propene can be well interpreted through the differences in the numbe
r and strength of acid sites, which were gas-chromatographically measu
red using pyridine and 2,6-dimethylpyridine chemisorbed at different t
emperatures (573 and 673 K). Dehydrogenation to 2-propanone occurred t
o a small extent at all reaction temperatures and, besides, its conver
sion changed slightly with reaction temperature. Propene selectivity s
trongly increased with increasing reaction temperature.