Insight into the oxidative desulfurization of high-sulfur petroleum coke under mild conditions:a journey of vanadium-substituted Dawson-type phosphotungstic acid  

作　　者：Fu-Min Li Ming-Qing Hua Yan-Chen Wei Ji-Xing Liu Jia-Hong Gong Chao Wang Pei-Wen Wu Yan Huang Hua-Ming Li Wen-Shuai Zhu 

机构地区：[1]School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,China [2]School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China [3]School of the Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,China

出　　处：《Petroleum Science》2021年第3期983-993,共11页石油科学（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.21722604);the Postdoctoral Foundation of China(Nos.2019M651743 and 2020M671365);the Natural Science Foundation of Jiangsu Province(No.BK20190852);the National Youth Natural Science Foundation(No.8111310009).

摘　　要：High-sulfur petroleum coke(HSPC),that is a by-product from slag oil in the coking process of refning,shows versatility values in practical applications and,however,concentrates the majority of organic sulfur.Herein,we design and construct a highly efective CTAB@HPA composites to be explored for the catalytic oxidative desulfurization of HSPC under mild conditions using hydrogen peroxide as the oxidant and 1-butyl-3-methylimidazole tetrafuoroborate ionic liquid as the extractant.The results demonstrate that the sulfur content of HSPC could be strikingly reduced from 4.46 wt%to 2.48 wt%under 60℃ and atmospheric pressure,and that the organic sulfur in HSPC is mainly oxidized to sulfoxide,sulfone and sulfate,which latter can be directly separated from petroleum coke.Moreover,the efect of reaction conditions on the desulfurization performance of HSPC as well as the catalytic oxidation reaction kinetic of HSPC desulfurization was systematically investigated.Furthermore,a mechanism for the oxidative desulfurization of HSPC over CTAB@HPA catalysts was proposed.Therefore,this work provides new insight into how to construct active catalysts for the desulfurization of HSPC under mild conditions.

关 键 词：High-sulfur petroleum coke Dawson-type phosphotungstic acid Oxidative desulfurization Mild conditions SULFATE 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]