Preparation of nanosheet ZSM-5 zeolite and its reaction performance for methanol to propylene
Making use of China's rich coal resources to produce propylene from methanol is an important alternative route for propylene production,and the key lies in the research and development of efficient catalysts.In this paper,two-dimensional layered staking structure nanosheet ZSM-5 molecular sieve was synthesized by using Gemini quaternary ammonium salt C18-6-6Br2 template.Compared with submicron ZSM-5 molecular sieve,the thickness of nanosheet ZSM-5 molecular sieve crystal in b-axis direction is significantly lower(only about 20nm),which improves the diffusivity of the catalyst.When applied to the MTP reaction,compared with the submicron ZSM-5 molecular sieve A sample,the propylene selectivity(48.3％v.s.40.1％)and catalytic life(170hv.s.80h)of the nanosheet ZSM-5 molecular sieve B sample are significantly improved,which provides a new idea for the design and development of industrial methanol to propylene catalyst.
methanol to propylene(MTP)ZSM-5nanosheetmolecular sievecatalyst
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