Citation: QIU Ze-gang, LI Qiao, MA Shao-bo, LI Zhi-qin. Effect of final carbonization temperature on catalytic performance of β-Mo₂C in quinoline hydrodenitrogenation[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(3): 357-368. shu

Effect of final carbonization temperature on catalytic performance of β-Mo₂C in quinoline hydrodenitrogenation

College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China

Corresponding author: LI Zhi-qin, lizhiqin@xsyu.edu.cn
Received Date: 20 December 2019
Revised Date: 30 January 2020

Fund Project: The project was supported by the National Natural Science Foundation of China 21606177The project was supported by the National Natural Science Foundation of China (21878243, 21606177) and Shanxi Natural Science Basic Research Program (2019JM-085)The project was supported by the National Natural Science Foundation of China 21878243Shanxi Natural Science Basic Research Program 2019JM-085

Figures(9)

MoO₃ was used as precursor, CH₄/H₂ as carbon source, and a direct reduction carbonization method with programmed temperature rise was used to prepare molybdenum carbide catalysts at different final carbonization temperatures (640, 660, 680, 700, and 720℃). The physical properties and structural properties of molybdenum carbide were characterized by XRD, N₂ adsorption, SEM, TEM, XPS and Raman. The effect of final carbonization temperature on the catalytic performance of molybdenum carbide in quinoline hydrodenitrogenation was studied. The results showed that the molybdenum carbide catalysts with different final carbonization temperatures were all existed in the phase of β-Mo₂C. The final carbonization temperature could significantly change content of species on the surface, average pore size, and mesopore distribution of molybdenum carbide. When the final carbonization temperature was 680℃, a higher carbonization degree, the lowest content of oxygen species on the surface and the highest surface C/Mo molar ratio of catalyst were obtained; accordingly, the best catalytic activity of catalysts was achieved. At 340℃ and 4 MPa, the conversion and denitrification rate of quinoline were up to 99%, while the selectivity of aromatic compounds was up to 37.8%, showing a lower aromatic ring destruction. Surface composition, especially surface oxygen, was essential for the regulation of the quinoline hydrodenitrogenation reaction pathway on β-Mo₂C.
- hydrodenitrification,
- quinoline,
- molybdenum carbide,
- β-Mo₂C,
- molybdenum oxide
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Effect of final carbonization temperature on catalytic performance of β-Mo2C in quinoline hydrodenitrogenation

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Effect of final carbonization temperature on catalytic performance of β-Mo₂C in quinoline hydrodenitrogenation