抄録
Catalytic experiments were performed over atomized Ni3Al powder in the temperature range from 873 to 1223 K under the atmosphere of steam and methane (ratio of 1 ). The powder was treated by two kinds of two-step surface pretreatment before reaction. One is chemical treatment, acid leaching followed by alkali leaching. Another is steam treatment, oxidization in steam followed by reduction in hydrogen. It was found that the catalytic activity was significantly enhanced by both pretreatments, especially by the chemical treatment. The surface characterization of the pretreated powders revealed that the enhancement by the pretreatments was attributed to the formation of fine Ni particles on the surface.
