Application of nano-Fe<sub>3</sub>O<sub>4</sub> catalyst in the viscosity reduction of heavy oil by hydrothermal cracking

LÜ Wen-dong; DING Bao-hong; FENG Xu-yang; WANG Qiang

Volume 47 Issue 11

Nov. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(11): 1320-1328

LÜ Wen-dong, DING Bao-hong, FENG Xu-yang, WANG Qiang. Application of nano-Fe3O4 catalyst in the viscosity reduction of heavy oil by hydrothermal cracking[J]. Journal of Fuel Chemistry and Technology, 2019, 47(11): 1320-1328.

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LÜ Wen-dong, DING Bao-hong, FENG Xu-yang, WANG Qiang. Application of nano-Fe₃O₄ catalyst in the viscosity reduction of heavy oil by hydrothermal cracking[J]. Journal of Fuel Chemistry and Technology, 2019, 47(11): 1320-1328.

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Application of nano-Fe₃O₄ catalyst in the viscosity reduction of heavy oil by hydrothermal cracking

College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, China

Funds:

the Liaoning Provincial Department of Education Basic Research Project L2017LFW002

More Information

Corresponding author: WANG Qiang, E-mail:qwang0124@126.com
Received Date: 2019-07-05
Rev Recd Date: 2019-08-12

Available Online: 2021-01-23

Publish Date: 2019-11-10

Abstract

Abstract

Four nano-Fe₃O₄ catalysts with different particle sizes were prepared by high temperature pyrolysis and low temperature two-phase reflux method; their performance in the hydrothermal cracking and viscosity reduction of Liaohe oil-field heavy oil was investigated. The results indicate that the addition of sodium sulfonate (HABS) surfactant in the preparation process can effectively improve the dispersion of Fe₃O₄ catalyst in heavy oil for hydrothermal cracking; the HABS-modified 9 nm Fe₃O₄ catalyst prepared by high temperature pyrolysis exhibits the best viscosity reduction performance. In a reaction system with 250 g heavy oil and 0.75 g n-hexane as hydrogen donor, where the mass ratio of heavy oil:catalyst:reservoir water is 100:0.3:30, the viscosity of heavy oil can be reduced from 86200 to 2065 mPa·s after reaction at 240℃ for 24 h; the viscosity reduction rate is as high as 97.6%. Analysis on the reaction mechanism suggests that the nano-Fe₃O₄ catalyst attacks the C-S bond on the long-chain heavy oil, breaks the bond and converts the heavy component into light component.
- hydrothermal cracking,
- heavy oil,
- nano Fe₃O₄,
- catalytic viscosity reduction,
- viscosity

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References(45)

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