Superior catalytic performance of micro-mesoporous Beta-SBA-15 composite with a high indexed isomerization factor in hydroisomerization of n-heptane
| Autor: | Peng Bai, Yi Zhang, Pingping Wu, Zhiyuan Shi, Wei Xing, Li Gao, Zifeng Yan, U.J. Etim |
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| Rok vydání: | 2019 |
| Předmět: |
Heptane
Materials science 020209 energy General Chemical Engineering Catalyst support Organic Chemistry Composite number Energy Engineering and Power Technology 02 engineering and technology Catalysis chemistry.chemical_compound Fuel Technology 020401 chemical engineering Chemical engineering chemistry 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering Zeolite Mesoporous material Selectivity Isomerization |
| Zdroj: | Fuel. 252:653-665 |
| ISSN: | 0016-2361 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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