Investigation of performance of Ni/W-USY/Al<sub>2</sub>O<sub>3</sub> catalyst with full mesoporous in Fischer Tropsch wax hydrocracking

HAN Lei; HUANG Chuan-feng; LIU Shu-wei; CHENG Qiu-xiang; CHANG Fang-yuan

Volume 47 Issue 3

Mar. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(3): 329-337

HAN Lei, HUANG Chuan-feng, LIU Shu-wei, CHENG Qiu-xiang, CHANG Fang-yuan. Investigation of performance of Ni/W-USY/Al2O3 catalyst with full mesoporous in Fischer Tropsch wax hydrocracking[J]. Journal of Fuel Chemistry and Technology, 2019, 47(3): 329-337.

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HAN Lei, HUANG Chuan-feng, LIU Shu-wei, CHENG Qiu-xiang, CHANG Fang-yuan. Investigation of performance of Ni/W-USY/Al₂O₃ catalyst with full mesoporous in Fischer Tropsch wax hydrocracking[J]. Journal of Fuel Chemistry and Technology, 2019, 47(3): 329-337.

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Investigation of performance of Ni/W-USY/Al₂O₃ catalyst with full mesoporous in Fischer Tropsch wax hydrocracking

Hydrocarbon High-efficiency Utilization Technology Research Center, Shaanxi Yanchang Petroleum(Group) Corp. Ltd., Xi'an 710075, China

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The project was supported by National Science and Technology Major Project 2018YFB0604600

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Corresponding author: HUANG Chuan-feng, Tel: 15009297336, E-mail: huangcf1130@163.com
Received Date: 2018-10-29
Rev Recd Date: 2019-01-14

Available Online: 2021-01-23

Publish Date: 2019-03-10

Abstract

Abstract

Ni/W-USY/Al₂O₃ with full mesoporous structure was prepared and used for hydrocracking of Fischer Fropsch wax. The catalyst was evaluated for its reaction performance, product characteristics and catalyst properties change. In a 312 h experiment, the result showed that the catalyst possessed high initial activity, and maintained stable after 120 h, and did not show obvious deactivation afterward. When the heavy wax conversion reached 73.95% at the stable stage, the fuel oil selectivity reached to 98.46% and C_{3, 4} constituted the most cracked gas. Gasoline, kerosene and diesel, as the products, were transparent and composed of paraffins and iso-paraffins substituted by methyl-groups. The iso-paraffin contents in the three products were 63.98%, 52.26% and 48.90% respectively. The fresh catalyst contained two main active states of WS₂ and NiWS, had good metal dispersion and rich mesoporous structure. With transition from high activity to stable state of the catalyst property, part of W migrated and formed more Ni-S-W bonds with Ni, and some W-S bonds broke to form W-W bonds after releasing S, resulting in the increase of active states of NiWS and the decrease of WS₂, and forming more Brönsted acid sites and less Lewis acid sites.
- Fischer Tropsch wax,
- hydrocracking,
- catalyst,
- fuel oil,
- iso-paraffin

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References(25)

References

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