Preparation of hierarchical ZSM-5 zeolites and their catalytic performance in thiophene alkylation

ZHAO Cen; LIU Dong-mei; WEI Min; SUN Zhi-yan; WANG Hai-yan

Volume 41 Issue 10

Oct. 2013

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Article Navigation > Journal of Fuel Chemistry and Technology > 2013 > 41(10): 1256-1261

ZHAO Cen, LIU Dong-mei, WEI Min, SUN Zhi-yan, WANG Hai-yan. Preparation of hierarchical ZSM-5 zeolites and their catalytic performance in thiophene alkylation[J]. Journal of Fuel Chemistry and Technology, 2013, 41(10): 1256-1261.

Citation:

ZHAO Cen, LIU Dong-mei, WEI Min, SUN Zhi-yan, WANG Hai-yan. Preparation of hierarchical ZSM-5 zeolites and their catalytic performance in thiophene alkylation[J]. Journal of Fuel Chemistry and Technology, 2013, 41(10): 1256-1261.

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Preparation of hierarchical ZSM-5 zeolites and their catalytic performance in thiophene alkylation

School of Petrochemical Engineering, Liaoning Shihua University, Fushun 113001, China

Received Date: 2013-02-04
Rev Recd Date: 2013-04-27
Publish Date: 2013-10-30

Abstract

Abstract

ZSM-5 zeolites were treated by Na₂CO₃ solutions with different concentrations and characterized by XRD, XRF, SEM, N₂ sorption and NH₃-TPD techniques; the influence of Na₂CO₃ treatment on their pore structure, acidity and performance in thiophene alkylation was investigated. The results showed that the BET surface area, external surface area and mesoporous volume of the ZSM-5 zeolites were enhanced through Na₂CO₃ treatment and the acidity was also modulated without altering the microporous structure of ZSM-5 zeolites. The activity and the selectivity to alkylates of the ZSM-5 zeolites in thiophene alkylation are also improved after Na₂CO₃ treatment. With the increase of Na₂CO₃ solution concentration, the thiophene conversion over the hierarchical ZSM-5 zeolites increases gradually, while the selectivity to alkylates increases first, reaches a maximum and then decreases along with the Na₂CO₃ solution concentration. When the Na₂CO₃ concentrations are 2 and 3 mol/L the thiophene conversions and alhylation selectivities are 81.26%, 73.15% and 90.57%, 72.59%, respectively.
- alkali-treatment,
- Na₂CO₃,
- ZSM-5,
- thiophene,
- alkylation

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References(30)

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