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 language | English |
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Pages (from-to) | 653-665 |
Number of pages | 13 |
Journal | Fuel |
Volume | 252 |
DOIs | |
State | Published - 15 Sep 2019 |
Externally published | Yes |
Keywords
- Beta-SBA-15
- Hydroisomerization
- Indexed isomerization factor
- Micro-mesoporous composites
- n-Heptane