文献类型：期刊文献

英文题名：Continuous Visbreaking of Heavy Oil in the Presence of Hot Compressed Water

作者：Xu, Ying-Jie[1];Sun, Yun-Fei[1];Yang, Jing-Yi[1];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

年份：2022

卷号：61

期号：15

起止页码：5129

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20221712033316);WOS:【SCI-EXPANDED(收录号:WOS:000794256700011)】；

基金：The authors acknowledge the financial supports from NSFC (22178113), SINOPEC (120011), and CNPC (PRIKY19022).

语种：英文

外文关键词：Reaction kinetics - Water - Condensation reactions - Viscosity - Heavy oil production

摘要：: The dealkylation-based visbreaking of heavy oil in a hot compressed water (HCW) environment was investigated in a tubular reactor at 400 degrees C and 18 MPa. Under the applied HCW environment, the heavy oil/water mixture is in a liquid-vapor two-phase structure and the calculated content of solubilized water in heavy oil reaches 3.5 wt %. The viscosity of the oil phase is reduced by the solubilization of water, which decreases the diffusion limitation on the reaction kinetics of dealkylation. Meanwhile, reactive olefin groups formed in dealkylation are partly consumed through the hydration with solubilized water, by which condensation is suppressed and the reaction time window for dealkylation is extended. Only after 3.2 min of visbreaking in the HCW environment, an optimal product with a viscosity reduction rate of 76% and an increased yield of light components could be obtained. In addition, the asphaltene content of the optimal product is lower than the initial value.