文献类型：期刊文献

英文题名：Visbreaking of Heavy Oil in Supercritical Benzene

作者：Liu, Xue-Qin[1];Qu, Hao[1];Yang, Jing-Yi[2];Yuan, Pei-Qing[1];Yuan, Wei-Kang[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Res Inst Petr Proc, Shanghai 200237, Peoples R China

年份：2019

卷号：33

期号：2

起止页码：1074

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20190706494251);WOS:【SCI-EXPANDED(收录号:WOS:000459836800044)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 21676084) and the project from SINOPEC (Grant No. ST18011-3-2).

语种：英文

外文关键词：Condensation reactions - Association reactions - Reaction kinetics - Benzene - Heavy oil production

摘要：The visbreaking of heavy oil in supercritical benzene ((SC)benzene) was investigated. By introducing (SC)benzene, the visbreaking originally occurring in the oil phase is transferred into (SC)benzene. The superior diffusivity in (SC)benzene improves the efficiencies of the initiation and propagation of visbreaking network, by which the reaction could be run in the desired tandem structure. By mitigating diffusion limitation to reaction kinetics, the cracking of alkyl substitutes of aromatics vital to viscosity reduction is accelerated. Being the secondary reaction of the cracking, condensation could be terminated promptly at the shortened reaction time necessary for visbreaking. A comparison between the visbreaking in (SC)benzene and supercritical water (SCH2O) confirms the effectiveness of improving diffusion for the optimization on heavy oil visbreaking. Nevertheless, the optimal operating conditions involved must be determined experimentally because of the complicated interaction between phase structure and reaction kinetics. The visbreaking in (SC)benzene shows the advantages of milder operating conditions and better product stability over the visbreaking in SCH2O.