Abstract
The thermal stability of alumina-supported Ni-Mo alloy catalysts for high temperature methanation was tested for several days under the following conditions; 650°C, 80kg/cm2 and 15, 000hr-1 GHSV. The results obtained were compared with those of unsupported Ni-Mo alloy, Ni-alumina and Mo-alumina catalysts. As a result, the alumina-supported Ni-Mo alloy catalysts maintained good activity for 5 days and effected less carbon deposition. The reason for the high thermal stability of the alloy catalysts was discussed based on the changes observed in catalyst composition, size of Ni-Mo alloy crystallites, Mo content in the alloy, carbon content and specific surface area during the heat test.
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