Promoting effects of CO2 on dehydrogenation of propane over a SiO2-supported Cr2O3 catalyst

Abstract The effects of carbon dioxide on the dehydrogenation of C 3 H 8 to produce C 3 H 6 were investigated over several Cr 2 O 3 catalysts supported on Al 2 O 3 , active carbon and SiO 2 . Carbon dioxide exerted promoting effects only on SiO 2 -supported Cr 2 O 3 catalysts. The promoting effects of carbon dioxide over a Cr 2 O 3 /SiO 2 catalyst were to enhance the yield of C 3 H 6 and to suppress the catalyst deactivation.