Sb. Wang et al., Effect of promoters on catalytic performance of Cr/SiO2 catalysts in oxidative dehydrogenation of ethane with carbon dioxide, CATAL LETT, 73(2-4), 2001, pp. 107-111
Several acidic and basic oxide promoted Cr/SiO2 catalysts were prepared and
investigated in oxidative dehydrogenation of ethane in the presence of car
bon dioxide. The effects of SO42-. WO3 and alkali metal oxides (Li2O, Na2O,
and K2O) on the catalytic activity were studied. It is found that sulfatio
n of silica produces a positive effect on ethane conversion and ethylene yi
eld while tungstation and addition of strong basic promoters (alkali metal
oxides) suppress the catalytic activity. Characterization indicates that th
e varying activity of the promoted catalysts can be attributed to the diffe
rence in acid/base property and redox potential.