The invention discloses a
hierarchical porous SSZ-13
molecular sieve catalyst, a method for synthesizing the same and application of the
hierarchical porous SSZ-13
molecular sieve catalyst. The method includes that long-chain
silane is selected to be used as an auxiliary for
crystallization synthesis reaction,
molar ratios of alkali sources,
silicon sources, aluminum sources, template agents, the long-chain
silane and water are regulated, and segmented dynamic / static
crystallization modes are adopted. Synthesizing procedures include steps of
gel forming and aging, crystallizing, washing, template agent removing and activating,
ion exchanging and activating and the like. High-
crystallinity hierarchical porous SSZ-13 molecular sieves with micropore-mesopore ordered distribution can be obtained by the aid of the method. The obtained molecular sieves have distribution of two types of pore sizes in a 2-5 nm range and a 5-15 nm range, the volumes of micropores are larger than 0.20 cm<3> / g, the volumes of mesopores are larger than 0.35 cm<3> / g, the specific surface areas are larger than 400 m<2> / g, and the yield of
crystallization products can reach 85% at least. The hierarchical porous SSZ-13
molecular sieve catalyst, the method and the application have the advantages that the SSZ-13 molecular sieves not only have merits of micropore
zeolite, but also have merits of mesopore materials which have
large pore sizes and are favorable for
macromolecule diffusion, the hierarchical porous SSZ-13 molecular
sieve catalyst has a broad application prospect in the fields of
petrochemical engineering, MTO (
methanol to olefin) reaction,
tail gas purification and
fine chemical engineering, and the like.