Abstract
ZSM-48 and ZSM-22 zeolites with similar Si/Al ratio were synthesized and modified by alkali treatment. Moreover, n-dodecane hydroisomerization performance of Pt supported ZSM-22 and ZSM-48 were investigated. The catalytic results showed that the activity and the isomers selectivity of n-dodecane hydroisomerization could be improved by alkali treatment. The isomers distributions were distinct for Pt/ZSM-48 and Pt/ZSM-22. Mono-branched isomers near the end of the chains were more prone to be generated on Pt/ZSM-22 catalyst, which suggested “pore-mouth” catalysis model dominating the hydroisomerization catalysis. However, di-branched isomers and mono-branched isomers with methyl near the middle of the carbon chains were favorable to be formed over Pt/ZSM-48 catalyst according to the “key-lock” catalysis model. Moreover, more central-branched isomers were formed at high reaction temperature (> 320 °C) especially for Pt/ HZSM-22.
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This work is supported by National Key R&D Program of China (2020YFB0606405), National Natural Science Foundation of China (U19B2003) and Shanxi Provincial Key Research and Development Projects (No. 201903D121036).
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Wang, Y., Liu, W., Zhang, W. et al. Comparison of n-Dodecane Hydroisomerization Performance Over Pt Supported ZSM-48 and ZSM-22. Catal Lett 151, 3492–3500 (2021). https://doi.org/10.1007/s10562-021-03587-8
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DOI: https://doi.org/10.1007/s10562-021-03587-8