Interface engineering of quaternary ammonium phosphotungstate for efficient oxidative desulfurization of high-sulfur petroleum coke

Reducing the sulfur content in high-sulfur petroleum coke (HSPC) has become an urgent issue, however, remains a great challenge with the development of petroleum refining industry. Herein, a highly-efficient catalyst quaternary ammonium phosphotungstate ionic liquid [(C 4 H 9 ) 4 N] 3 PW 12 O 40 (C4...

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Bibliographic Details
Published in:Petroleum science and technology 2023-01, Vol.41 (1), p.86-103
Main Authors: Gong, Jiahong, Xu, Huanhuan, Liu, Jixing, Liu, Hui, Hua, Mingqing, Yang, Ning, Wu, Peiwen, Li, Huaming, Zhu, Wenshuai
Format: Article
Language:English
Subjects:
Catalysts
Coke
Desulfurizing
Dibenzothiophene
environmental
Hydrogen peroxide
ionic liquid
Ionic liquids
mild conditions
oxidative desulfurization
Petroleum coke
Petroleum refining
Sulfur
thiophene sulfides
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Summary:Reducing the sulfur content in high-sulfur petroleum coke (HSPC) has become an urgent issue, however, remains a great challenge with the development of petroleum refining industry. Herein, a highly-efficient catalyst quaternary ammonium phosphotungstate ionic liquid [(C 4 H 9 ) 4 N] 3 PW 12 O 40 (C4@HPA) was initiated to activate H 2 O 2 , and the sulfur content of HSPC was remarkably decreased from 4.46 wt.% to 2.76 wt.% at a relatively mild temperature (70 o C), which is discernible below than 1400 o C in industry. The characterization results showed that only sulfate can be removed, while sulfoxide and sulfone were retained in petroleum coke. Moreover, the desulfurization activity of C4@HPA/H 2 O 2 to thiophene sulfides decreases as follows: Thiophene > 2-Methylthiophene > 2,5-Dimethylthiophene > Dibenzothiophene > 4-Methyldibenzothiophene. It reveals that the sulfur of 4-MDBT is the most difficult to be removed. Therefore, this founding here may shine light on the understanding and construction of efficient catalyst for desulfurization of high-sulfur petroleum coke in industry.
ISSN:1091-6466
1532-2459
DOI:10.1080/10916466.2022.2032740