Oxidation of Dibenzothiophene in Model Diesel Using Hydroperoxide Generated via In-Situ Reaction of Octane with Oxygen  

作　　者：Guo Erliang Li Jianxin Huang Xiaoqiao Duan Yongshen Zhang Lingcong Yan Lijun Lu Shuxiang 

机构地区：[1]College of Chemical Engineering and Materials Science,Tianjin University of Science and Technology,Tianjin 300457 [2]PetroChina Fuel Oil Company Limited Research Institute,Beijing 100195 [3]Petrochemical Research Institute,PetroChina Company Limited,Beijing 100195

出　　处：《China Petroleum Processing & Petrochemical Technology》2018年第1期116-122,共7页中国炼油与石油化工（英文版）

基　　金：the Undergraduate Innovation and Entrepreneurship Training Project (201710057009) for providing funding and support for this research

摘　　要：The potential of carrying out oxidative desulfurization(ODS) using oxygen as an oxidant was explored in this work. n-Octane firstly reacted with oxygen to produce hydroperoxides in-situ, which were then used as oxidants to oxidize the dibenzothiophene(DBT) in the absence of catalysts. The hydroperoxides generated in-situ were effective in oxidizing DBT to its corresponding dibenzothiophene sulfone(DBTO_2) which was characterized by FT-IR and ~1H-NMR. The removal rate of DBT could reached 98.4% under conditions covering a temperaure of 140℃, a rection duration of 4 h, and an oxygen partial pressure of 0.4 MPa. The influences of different hydrocarbon components in diesel on DBT removal were investigated. The results showed that cyclohexane and n-dodecane had no effect on the removal of DBT, but xylene had a slight negative effect on DBT removal. A possible oxidation mechanism was proposed and the concentration of hydroperoxides in both O_2-oxidized octane and model diesel were detected.The potential of carrying out oxidative desulfurization(ODS) using oxygen as an oxidant was explored in this work. n-Octane firstly reacted with oxygen to produce hydroperoxides in-situ, which were then used as oxidants to oxidize the dibenzothiophene(DBT) in the absence of catalysts. The hydroperoxides generated in-situ were effective in oxidizing DBT to its corresponding dibenzothiophene sulfone(DBTO_2) which was characterized by FT-IR and ~1H-NMR. The removal rate of DBT could reached 98.4% under conditions covering a temperaure of 140℃, a rection duration of 4 h, and an oxygen partial pressure of 0.4 MPa. The influences of different hydrocarbon components in diesel on DBT removal were investigated. The results showed that cyclohexane and n-dodecane had no effect on the removal of DBT, but xylene had a slight negative effect on DBT removal. A possible oxidation mechanism was proposed and the concentration of hydroperoxides in both O_2-oxidized octane and model diesel were detected.

关 键 词：oxidative desulfurization OXYGEN DIBENZOTHIOPHENE HYDROPEROXIDES GENERATED in-situ 

分 类 号：TE62[石油与天然气工程—油气加工工程]