Petroleum Science >2024,??Issue3:??- DOI: https://doi.org/10.1016/j.petsci.2024.01.023
A molecular insight into coke formation process of vacuum residue in thermal cracking reaction Open?Access
文章信息
作者：Ji-Guang Li, Xin Guo, Huan-Di Hou
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引用方式：A molecular insight into coke formation process of vacuum residue in thermal cracking reaction, Petroleum Science, Volume 21, Issue 3, 2024, Pages 2130-2138, https://doi.org/10.1016/j.petsci.2024.01.023.
文章摘要
Abstract: 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?°C 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 from 8.05% 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.
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Keywords: Vacuum residue; Thermal cracking; Asphaltene; Coking induction period; Sulfur; Nitrogen