A molecular insight into coke formation process of vacuum residue in thermal cracking reaction  

作　　者：Ji-Guang Li Xin Guo Huan-Di Hou 

机构地区：[1]Heavy Oil Processing Department,Sinopec Research Institute of Petroleum Processing Co.,Ltd,Beijing,100083,China

出　　处：《Petroleum Science》2024年第3期2130-2138,共9页石油科学（英文版）

摘　　要：Understanding the coking behaviors has been considered to be really essential for developing better vacuum residue processing technologies.A battery of thermal cracking tests of typical vacuum residue at 410℃ with various reaction time were performed to evaluate the coke formation process.The total yields of ideal components including naphtha,atmospheric gas oil(AGO)and vacuum gas oil(VGO)of thermal cracking reactions increased from 10.89%to 40.81%,and the conversion ratios increased from8.05%to 43.33%with increasing the reaction time from 10 to 70 min.The asphaltene content increased from 12.14%to a maximum of 22.39%and then decreased,and this maximum of asphaltene content occurred at the end of the coking induction period.The asphaltenes during the coking induction period,at the end and after coking induction period of those tested thermal cracking reactions were characterized to disclose the structure changing rules for coke formation process,and the coke formation pathways were discussed to reveal the coke formation process at molecular level.

关 键 词：Vacuum residue Thermal cracking ASPHALTENE Coking induction period SULFUR NITROGEN 

分 类 号：TE624[石油与天然气工程—油气加工工程]