Preparation of hydrocarbon dispersible HZSM-5 nanocrystals by hydrothermal crystallization of organofunctionalization seeds

Organofunctionalization of zeolitic seeds was used to synthesize hydrocarbon dispersible HZSM-5(HDZ) nanocrystals, in which organic groups grafted on seeds not only limit the growth of nanocrystals but also change surface hydrophobicity of nanocrystals. The high dispersion of the prepared HZSM-5 nanocrystals in n-dodecane was observed and further confirmed by TEM. The quasi-homogeneous catalytic cracking of n-dodecane with HDZ showed about 30% improvement in the catalytic activity with organofunctionalization seeds, which is promising for the potential applications in some special fields.

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► Hydrocarbon dispersible HZSM-5 (HDZ) nanocrystals were synthesized with organofunctionalized seeds.
► The prepared HZSM-5 nanocrystals exhibit high dispersion stability in hydrocarbon.
► The catalytic cracking activity of HDZ is ca. 25% higher than that from post-graft method.