Abstract
Catalytic production of hydrogen by steam reforming of methanol reaction has been developed on a series of co-precipitated Cu/ZrO 2/Al 2O 3 catalysts at atmospheric pressure in a microreactor. Effects of catalyst composition, reaction temperature, H 2O/CH 3OH molar ratio and methanol space velocity on the performance of Cu/ZrO 2/Al 2O 3 catalysts have been investigated. Cu/ZrO 2/Al 2O 3 catalysts exhibited higher activity and stability as compared to Cu/Al 2O 3 catalyst. The catalyst containing 15 wt.% of ZrO 2 was the most active one with a methanol conversion of 95.0 mol%, H 2 selectivity of 99.9 mol% and the outlet CO concentration of 0.17 mol% at 250 °C. After 200 h of reaction, methanol conversion was still over 90.0 mol% with Cu/ZrO 2/Al 2O 3 catalyst. XRD results showed that the addition of ZrO 2 to Cu/Al 2O 3 catalysts not only greatly improved copper dispersion in the catalyst surface but also prevented copper crystallites from conglomeration or sintering.
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