Abstract
In the absence of a structure-directing organic molecule, aluminosilicate ZSM-5 is produced directly from high-silica zeolite Y or zeolite β by a simple hydrothermal treatment of the alkali metal hydroxide-treated starting zeolite material. NMR and FTIR results clearly suggest that the majority of the Al(III) species is present in the framework yielding Brønsted acid sites. Addition of an appropriate organic molecule such as tetrapropylammonium bromide or tetrabutylammonium bromide facilitates the formation of ZSM-5 and ZSM-11, respectively. The protonated form of all the ZSM-5 catalysts shows very good catalytic activity for the conversion of methanol to hydrocarbon.
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Zenonos, C., Sankar, G., García-Martínez, J. et al. Direct Hydrothermal Conversion of High-Silica Faujausite and Zeolite β to ZSM-5 and Its Catalytic Performance. Catalysis Letters 86, 279–283 (2003). https://doi.org/10.1023/A:1022688623543
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DOI: https://doi.org/10.1023/A:1022688623543