Bimetallic mil-53 derived porous composite metal oxide materials and methods for their preparation, a propane dehydrogenation catalyst prepared using the same and applications thereof

Abstract

This invention belongs to the field of catalyst technology, specifically relating to porous composite metal oxide materials derived from bimetallic MIL-53 and their preparation methods, as well as propane dehydrogenation catalysts prepared using these materials and their applications. The method includes the following steps: hydrothermal reaction of aluminum salt, gallium salt, and 1,4-terephthalic acid; solvothermal treatment and washing of the hydrothermal reaction products to obtain a bimetallic MIL-53 precursor; calcination of the bimetallic MIL-53 precursor sequentially under an inert atmosphere and an oxidizing atmosphere to obtain a porous composite metal oxide material; reduction by H2 under a nitrogen atmosphere; and subsequent calcination in air to obtain the composite metal oxide catalyst. This invention controls the Al... 3+ with Ga 3+ The precise molar ratio of the feed and the experimental procedure of reduction followed by calcination can prevent the formation of gallium oxide clusters, ensuring that gallium oxide is uniformly dispersed in the material, while simultaneously promoting the activity of Ga2+ species. Ⅳ The generation of .

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