Studies on Activity and Characteristics of CuO/ZnO/TiO2 Catalysts for Methanol Steam Reforming

메탄올 수증기 개질반응을 위한 CuO/ZnO/TiO2계 촉매의 활성 및 특성에 관한 연구

  • Received : 1998.01.16
  • Accepted : 1998.09.07
  • Published : 1998.12.10

Abstract

Cu-Zn and Cu-Zn-Ti catalysts for the steam reforming of methanol were prepared. This reaction was carried out at atmospheric pressure, $250^{\circ}C$, steam/methanol molar ratio 1.5, and contact time 0.1 g-cat.hr/mL-feed. In case of the catalyst with 3 mol% of $TiO_2$, the activity was superior to that of catalysts without $TiO_2$. The reaction products were mainly hydrogen and carbon dioxide. It was found that catalytic activity was not related to specific surface area but affected by metallic copper area which was measured by $N_2O$ decomposition and increased with the addition of $TiO_2$ content. XPS and XRD showed that the oxidation state of zinc was not changed during reaction, but oxidation states of copper existed in Cu(0) or Cu(I).

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