文献类型：期刊文献

英文题名：Visbreaking of Heavy Oil in a Mixed Solvent of Subcritical Water and Light Aromatics

作者：Ling, Hao[1];Hu, Yu-Yang[2];Zhu, Ya-Kun[1];Zhang, Hua-Jie[1];Shao, Zhi-Cai[3];Dai, Li-Shun[3];Huang, Zi-Bin[1];Yuan, Pei-Qing[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China;[3]SINOPEC Res Inst Petr Proc, Beijing 100083, Peoples R China

年份：2021

卷号：60

期号：25

起止页码：9059

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20212910647063);WOS:【SCI-EXPANDED(收录号:WOS:000670420500010)】；

基金：The authors acknowledge the support from CNPC (Grant No. PRIKY19022), SINOPEC (Grant No. 120011; ST18011-3-2), and NSFC (Grant No. 21676084).

语种：英文

外文关键词：Free radicals - Olefins - Heavy oil production - Viscosity - Asphaltenes - Aromatization - Efficiency

摘要：To achieve high-efficiency viscosity reduction in a mild hydrothermal environment, the visbreaking of heavy oil in a mixed solvent of subcritical water (sub-CW) and light aromatics was investigated. By solubilizing sub-CW in heavy oil, the dealkylation involved in visbreaking follows not only a free radical mechanism but also an ionic mechanism. The further introduction of light cycle oil rich in light aromatics but containing olefin groups has a complicated influence on visbreaking. Because of the presence of olefin groups, the viscosity reduction efficiency is initially reduced. In addition, the condensation to asphaltenes is promoted in the late visbreaking stage. However, these adverse effects are offset by the promotion of the solubilization of sub-CW in heavy oil by light aromatics. With enhanced dealkylation in both free radical and ionic mechanisms, a viscosity reduction rate of over 90% and reduced asphaltene formation can be obtained in the middle stage of visbreaking.