期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 9, 期 4, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2021.105693
关键词
Hydrodesulfurization; Thiophene; Molybdenum carbide; gamma-Alumina; Mesoporous materials
资金
- National Natural Science Foundation of China [52022054, 51974181]
- Shanghai Rising-Star Program [19QA1403600]
- Iron and Steel Joint Research Found of National Natural Science Foundation [U1860203]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning [TP2019041]
- China Baowu Steel Group Corporation Limited [U1860203]
- SINOPEC
The Mo2C/gamma-MA catalyst exhibits high catalytic activity and stability for thiophene hydrodesulfurization, attributed to the small Mo2C nanoparticles formation, appropriate surface acidity, and strong interaction between Mo2C species and alumina inhibiting sulfurization.
A new mesoporous alumina-supported molybdenum carbide (Mo2C/gamma-MA) has been successfully prepared by one-step hydrolysis method without template, followed by carbonization with a mixed gas of CH4 and H-2. The Mo2C particles (2.5 +/- 0.3 nm) are homogeneously dispersed in the gamma-alumina (gamma-MA) framework and exhibit high catalytic activity and stability for thiophene hydrodesulfurization (HDS). Taking 1 wt% thiophene (3810 ppm S) as an example, the Mo2C/gamma-MA exhibits 92% thiophene conversion, higher than the MoS2/gamma-MA (85%), and other molybdenum carbides supported over commercial alumina and gamma-MA prepared by the impregnation method. The stability test demonstrated that the Mo2C/gamma-MA almost showed no deactivation during 150 h reaction, and no obvious carbon deposition and sulfurization of Mo2C species were observed over the spent Mo2C/gamma-MA. The high HDS activity and stability of the Mo2C/gamma-MA for HDS could be attributed to the formation of small Mo2C nanoparticles, appropriate surface acidity and the strong interaction between Mo2C species and alumina inhibiting the sulfurization of Mo2C species.
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