Ma. Aramendia et al., GAS-PHASE HYDROGEN-TRANSFER REDUCTION OF ACROLEIN USING 2-PROPANOL OVER MGO B2O3 AND SIO2/ALPO4 CATALYSTS/, Catalysis letters, 50(3-4), 1998, pp. 173-177
Two MgO/B2O3 and SiO2/AlPO4 catalysts designated BM50 and PM2, respect
ively, were used in the gas-phase hydrogen transfer between acrolein a
nd 2-propanol to obtain allyl alcohol and propanal. The acid-base prop
erties and catalytic activity of the two systems were found to be rath
er different. Thus, the MgO/B2O3 catalyst is more selective towards al
lyl alcohol than is the SiO2/ AlPO4 catalyst (conversion to the alcoho
l was 28% with the former and 0% with the latter). This special select
ivity is discussed in terms of the different ways in which acrolein ca
n be adsorbed on the catalytic surface as revealed by temperature-prog
rammed desorption profiles and DRIFT spectra for pre-adsorbed acrolein
.