Thermal analysis of gel-derived support for metallic catalyst

Abstract

A series of Al₂O₃-SnO₂ catalysts with the molar ratio of Al₂O₃ to SnO₂ between 1:0 and 0:1 have been characterized by thermal analysis in reductive conditions, TPR and XRD methods. In the reductive conditions in temperatures up to about 1000 K, no reduction of the tin component to the metallic form takes place in the binary gel Al₂O₃-SnO₂. In the temperatures characteristic of the reforming process, only a reduction to SnO occurs in the above binary support. Thermal analysis of the gels in the reductive conditions and TPR results indicate stabilisation of the tin oxide species even in the systems of the molar ratio of Al₂O₃ to SnO₂ of 1:1. The metallic tin appears in the binary gel only after its reduction in the hydrogen atmosphere at temperatures close to ∼1100 K.