Mechanism of effects of surface acidity on performance of adsorption desulfurization of NiY zeolites

SONG Li-juan; HU Yue-ting; QIN Yu-cai; YU Wen-guang; ZHANG Xiao-tong

Volume 44 Issue 9

Sep. 2016

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Article Navigation > Journal of Fuel Chemistry and Technology > 2016 > 44(9): 1082-1088

SONG Li-juan, HU Yue-ting, QIN Yu-cai, YU Wen-guang, ZHANG Xiao-tong. Mechanism of effects of surface acidity on performance of adsorption desulfurization of NiY zeolites[J]. Journal of Fuel Chemistry and Technology, 2016, 44(9): 1082-1088.

Citation:

SONG Li-juan, HU Yue-ting, QIN Yu-cai, YU Wen-guang, ZHANG Xiao-tong. Mechanism of effects of surface acidity on performance of adsorption desulfurization of NiY zeolites[J]. Journal of Fuel Chemistry and Technology, 2016, 44(9): 1082-1088.

Citation:

SONG Li-juan, HU Yue-ting, QIN Yu-cai, YU Wen-guang, ZHANG Xiao-tong. Mechanism of effects of surface acidity on performance of adsorption desulfurization of NiY zeolites[J]. Journal of Fuel Chemistry and Technology, 2016, 44(9): 1082-1088.

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Mechanism of effects of surface acidity on performance of adsorption desulfurization of NiY zeolites

1.
Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Province, Liaoning ShiHua University, Fushun 113001, China
2.
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

Funds:

the National Natural Science Foundation of China 21076100

the National Natural Science Foundation of China 21376114

China National Petroleum Corporation Refinery Catalyst Major Projects 10-01A-01-01-01

Received Date: 2016-02-29
Rev Recd Date: 2016-05-12

Available Online: 2021-01-23

Publish Date: 2016-09-10

Abstract

Abstract

The adsorption behaviors of thiophene, cyclohexene and benzene, and competitive adsorption of thiophene & cyclohexene, and thiophene & benzene over NiY zeolites were studied by in situ Py-FTIR spectroscopy method. The results of single probe molecular adsorption indicate that the Lewis (L) acid sites according to Ni species are the major active centers for the thiophene adsorption, more over the Brönsted (B) acid sites of the NiY and HY are the catalytic active centers of the protonation and oligomerization of thiophene and cyclohexene, while the reaction intensity on NiY is significantly weaker than that on HY zeolite. The competitive adsorption results show that the strongly adsorbed dimeric cyclohexene on B acidic sites in NiY zeolite plays a significant competitive adsorption to thiophene adsorption behavior. The effective solutions to solve the competitive adsorption from olefins and aromatics to thiophene are to reduce the surface B acid centers of the adsorbent and to increase temperature of adsorption system.
- in situ Py-FTIR,
- NiY zeolite,
- surface acidity,
- adsorption desulfurization,
- competitive adsorption

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References(24)

References

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