Citation: LIU Dong-mei, ZHAI Yu-chun, MA Jian, WANG Hai-yan. Study on thiophene alkylation performance of hierarchical ZSM-5 zeolites modified by different alikali[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(4): 462-469. shu

Study on thiophene alkylation performance of hierarchical ZSM-5 zeolites modified by different alikali

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1. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;

Corresponding author: ZHAI Yu-chun,
Received Date: 18 September 2014

Fund Project: 国家自然科学基金(21401093) (21401093)辽宁省自然科学基金(201202126)。 (201202126)

HZSM-5 zeolites were respectively treated by Na₂CO₃,TPAOH and mixed alkali solution of TPA⁺/CO₃^2-. The samples were characterized by FT-IR XRD, XRF, N₂ adsorption/desorption, SEM, NH₃-TPD and Py-FTIR techniques. It was found that the microporous and mesoporous hierarchical HZSM-5 (A) catalysts were formed after the treatment and their acidity were modulated. The largest surface area and the most mesoporous were found in the HZSM-5(TPA⁺/CO₃^2-) treated by the mixed alkali of TPA⁺/CO₃^2-s. The thiophene alkylation performance of HZSM-5 and HZSM-5(A) zeolites was investigated in a small-scale fixed bed reactor with model compounds as feedstock. The co-sequences displayed that HZSM-5 (TPA⁺/CO₃^2-) catalysts exhibited the higher conversion of thiophene and selectivity of 1-hexene because the zeolites had proper hierarchical pore diameter and more B-acid sites.
- Na₂CO₃,
- TPAOH,
- ZSM-5,
- hierarchical pore,
- thiophene alkylation
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