Superior catalytic performance of micro-mesoporous Beta-SBA-15 composite with a high indexed isomerization factor in hydroisomerization of n-heptane

Li Gao, Zhiyuan Shi, Ubong Jerome Etim, Pingping Wu, Wei Xing, Yi Zhang, Peng Bai*, Zifeng Yan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

A composite material Beta-SBA-15 (BS)comprising zeolite Beta units and SBA-15-like mesoporous structure was hydrothermally synthesized and served as catalyst support for the hydroisomerization of n-heptane. Materials were characterized by a variety of techniques. Characterization results revealed that Beta-SBA-15 composite has a two-dimensional hexagonal mesoporous channel with a pore size of 6.4 nm and a high concentration of moderate-strength acid sites. Evaluation results showed that Pt/HBS exhibited a relatively high n-heptane conversion (75.57%)with a good selectivity to isoheptanes (90.04%), resulting in the highest isoheptanes yield (68.04%)among all samples. The micro-mesoporous composite structure with moderate surface acidity enhanced diffusion of large isomerized intermediates as well as inhibiting the occurrence of cracking side reactions, achieving a high isoheptanes yield. Experimental data demonstrates that the indexed isomerization factor (IIF)as a performance descriptor can accurately predict the isomerization performance of catalysts.

Original languageEnglish
Pages (from-to)653-665
Number of pages13
JournalFuel
Volume252
DOIs
StatePublished - 15 Sep 2019
Externally publishedYes

Keywords

  • Beta-SBA-15
  • Hydroisomerization
  • Indexed isomerization factor
  • Micro-mesoporous composites
  • n-Heptane

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