Abstract
The influence of heat treatment on catalytic activity and durability for steam reforming of dimethyl ether (DME SR) over the composite catalysts of CuFe 2O 4 spinel and γ-Al 2O 3 was investigated. The heat treatment in air after mixing of CuFe 2O 4 and Al 2O 3 improved the activity and durability of the composite catalysts for DME SR. The treatment temperature range of 700–800 °C is most effective to enhance the catalytic performance. According to XRD and TPR analyses, the new phase of Cu–Fe–AlO 4 was produced by solid-state reaction at the interface between CuFe 2O 4 and Al 2O 3 after heat treatment, leading to high catalytic performance. This new active phase also formed over the composites of pre-reduced CuFe 2O 4 and Al 2O 3, due to the re-construction of Cu–Fe spinel by the heat treatment.
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