Steam Reforming of Methanol over SnO_2 Catalyst Inactive for The Reverse Water-gas Shift Reaction

摘要

In recent years, H_2 production for a fuel cell has become of general interest and steam reforming of methanol has been investigated extensively using group Ⅷ metal or Cu-containing catalysts. The reaction over group Ⅷ metal catalysts is considered to proceed through the methanol decomposition into CO and H_2, followed by the water-gas shift reaction. On the other hand, methanol is hydrolyzed over Cu-containing catalyst to give formic acid that decomposes into CO_2 and H_2. CO is formed in some extent over both catalysts because of the thermodynamic equilibrium of water-gas shift reaction. Recently, we have reported that SnO_2 catalyzes methanol conversion to form CH_4, CO_2 and H_2 (eq 1) selectively. 2 CH_3OH→ CH_4 + CO_2 + 2H_2 (1) In this study, we investigated the steam reforming of methanol by using SnO_2 catalyst.