Abstract
The addition of sodium phosphate monobasic (NaH2PO4) to a synthetic mixture allows a one-step synthesis of mesoporous Beta zeolite. Aggregation of the nanosized Beta zeolites allows the filtration difficulties to be overcome while the intercrystalline mesopores reduce the diffusion limitation and thus enhance the catalytic activity. The obtained Beta zeolite samples were characterized by X-ray diffraction, scanning electron microscopy, N2 adsorption-desorption, and temperature-programmed desorption of ammonia. The amount of phosphate strongly influenced the mesopore volume of the Beta zeolites. When the molar ratio of NaH2PO4/SiO2 was 0.1, the sample had good textural and acidic properties and exhibited the best catalytic activity for the alkylation of phenol with tert-butanol.
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