In order to maximize bio-jet fuel production from the above process, the hydroconversion of hexadecane, a model compound for green diesel, was carefully investigated over Pt-supported high-silica HY-DA zeolite with hierarchical trimodal porosity in a fixed-bed reactor. A comparative study was carried out using Pt-loaded microporous HY zeolite. Due to the hierarchical trimodal porosity in the zeolite which favors rapid diffusion of bulky intermediates from the micropores and the low acidity which inhibits excess second reactions in the micropores, Pt/HY-DA was closer to the ideal hydrocracking characteristics of high isomerization yields and limited second cracking compared to Pt/HY. As a result, the former showed closer bell-shaped carbon number distributions of cracking products and higher yields of jet fuel components (C9-C14) at all cracking yields compared to the latter. Also, at medium to high cracking yields (&gt;20 %), both catalysts yielded jet fuels with high isomerization degree.

Hexadecane hydrocracking for jet fuel production over Pt/HY catalyst

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