文献类型：期刊文献

英文题名：Demetallization of Heavy Oils of High Metal Content through Pyrolysis under Supercritical Water Environment

作者：Tang, Xu-Quan[2];Pu, Jing-Cao[2];Zheng, Hong-Bing[2];Yu, Xu-De[2];Chen, Xue-Feng[1];Yuan, Pei-Qng[2];Cheng, Zhen-Min[2];Yuan, Wei-Kang[2]

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

年份：2020

卷号：34

期号：3

起止页码：2861

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20201108282571);WOS:【SCI-EXPANDED(收录号:WOS:000526414800023)】；

基金：The authors acknowledge the financial support from SINOPEC (ST18011-3-2) and NSFC (21676084).

语种：英文

外文关键词：Emulsification - Crude oil - Heavy oil production - Metals - Nitrogen removal - Asphaltenes - Condensation

摘要：Through pyrolysis under a supercritical water (SCW) environment, the demetallization of Tsingtao vacuum residuum (VR) and Tahe atmospheric residuum (AR) with a total vanadium and nickel content above 300 ppm was studied. By introducing SCW, pyrolysis of heavy oil can be carried out in an emulsion structure in which heavy fractions rich in metals are concentrated in oil droplets. A metal removal rate higher than 90% could be obtained in 2 h, which is faster than the pyrolysis under the nitrogen environment. Although the two heavy oils have similar apparent properties, Tsingtao VR is characterized by the metal enrichment in the heaviest asphaltenes and the higher condensation activity of asphaltenes. Because of the preferential condensation of heavy fractions rich in metals, the liquid product yield of Tsingtao VR could be 15 wt % higher than that of Tahe AR at the metal removal rate of 70% to 90%.