A kind of graphene/molecular sieve composite catalyst and preparation method thereof

A composite catalyst and graphene technology, applied in molecular sieve catalysts, including molecular sieve catalysts, carbon compound catalysts, etc., can solve the problems of HZSM-5 and graphene acid catalytic activity and catalytic performance that have not been reported, and achieve enhanced The effect of catalytic activity and good application prospect
CN106475131BActive Publication Date: 2019-01-11SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Publication Date
2019-01-11

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Abstract

The invention discloses a graphene / molecular sieve composite catalyst and a preparation method thereof. The composite catalyst comprises, by weight, 5-40% of graphene and 60-95% of molecular sieve. The composite material has a quasi-two-dimensional lamellar structure, the ratio of the area of a single lamella to the thickness of the single lamella is more than 100 micrometers, the molecular sieve is evenly loaded on the surface of the graphene, and mesopore diameter is 2-30 nanometers. The preparation method includes: mixing the graphene, a silicon source, an aluminum source and a surfactant, separating out a graphene-containing part, crystalizing, purifying, and removing the surfactant. The graphene / molecular sieve composite catalyst has the advantages that the composite catalyst serving as a solid acid catalyst has enhanced catalytic activity, product yield and reusability can be evidently increased while the catalytic activity is not lowered when the catalyst is used in CBG and EHB reaction, and accordingly the catalyst is promising in application prospect.
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Description

technical field

[0001] The invention relates to a graphene / molecular sieve composite catalyst and a preparation method thereof, belonging to the technical field of catalysts and preparation thereof. Background technique

[0002] Molecular sieve catalysts are widely used in many fields such as industrial petroleum refining, catalysis and separation. ZSM-5 has a three-dimensional network microporous structure. It has become an indispensable solid acid catalyst with its unique pore structure, good catalytic performance, excellent hydrothermal stability and thermal stability, and has good shape selectivity. However, traditional molecular sieves are all microporous, and 90% of the pores are smaller than 2nm. The pore size of conventional ZSM-5 is only 0.5 nm. Molecular sieves are disadvantageous in catalytic applications due to the limited transport pathways for molecules due to their microporous structure. In addition, the traditional ZSM-5 only has a microporous structure, w...

Claims

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