期刊
CATALYSIS COMMUNICATIONS
卷 102, 期 -, 页码 93-97出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2017.08.030
关键词
Heteropolyacid; Isomerization; n-Heptane; Trifunctional catalyst; SBA-15
资金
- CONACyT-Mexico
- Instituto Politecnico Nacional [SIP-20161182, SIP-20171266, SIP-20170628]
For the first time, highly selective Pt/H3PW12O40/SBA-15 trifunctional catalysts were evaluated for n-heptane hydroisomerization. Both Lewis (L) and Bronsted (B) acid sites were present in these catalysts. Reduction treatment led to heteropolyacid dispersion better and Pt nanoparticles smaller. With the best lwt%Pt/20wt% H3PW12O40/SBA-15 catalyst, 100% isomerization selectivity and 56.74% n-heptane conversion were obtained at 320 degrees C. Among the products, the dibranched isomers concentration faction was > 50% and 2,2-dimethylpentane was predominant. Pt/H3PW12O40/SBA-15 catalysts with Pt nanocrystals, proper acidity strength and a balanced ratio of B/L acid sites, and highly ordered large mesopores were chiefly responsible for the high isomerization selectivity.
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