Date of Publication:2022-10-06

Journal:石油学报 石油加工

Affiliation of Author(s):化工学院

Issue:3

Page Number:705-710

ISSN No.:1001-8719

Abstract:Nanocrystalline stacked structural ZSM-5 zeolite microsphere was hydrothermally synthesized by varied temperature with vinyltriethoxysilane and tetraethoxysilane as double silica resources ,and characterized by XRD ,FT-IR ,SEM ,TEM ,N2 adsorption-desorption techniques . The catalytic performance of catalysts in the methylation of 2-methylnaphthalene (2-MN ) with methanol to produce 2 ,6-dimethylnaphthalene (2 ,6-DMN) was investigated .The results showed that the prepared sample was ZSM-5 zeolite microsphere containing many nano-crystals with good crystallinity .The nanocrystalline stacked structural ZSM-5 zeolite performed higher activity and selectivity than commercial nano ZSM-5 in 2 ,6-DMN synthesis with the highest 2-MN conversion of 39.2% ,and 2 ,6-DMN yield of 7.1% and the 2 ,6-/2 ,7-DMN molar ratio of 1.9 after 8 h on stream ,which was ascribed to its more acid sites and weaker acid strength .

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