文献类型：期刊文献

英文题名：Initiator-introduced heavy oil visbreaking in supercritical benzene

作者：Wang, Rong[1];Wang, Li-Tao[2];Wang, Lu-Hai[2];Liu, Yin-Dong[2];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;[2]Petrochina Petrochem Res Inst, Beijing 102206, Peoples R China

年份：2022

卷号：165

外文期刊名：JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS

收录：;EI(收录号：20222412208923);WOS:【SCI-EXPANDED(收录号:WOS:000812360100002)】；

基金：Acknowledgments The authors acknowledge the financial supports from National Nat-ural Science Foundation of China (22178113) , China Petrochemical Corporation (120011) and China National Petroleum Corporation (PRIKY19022) .

语种：英文

外文关键词：Heavy oil; Visbreaking; Supercritical benzene; Initiator; Diffusion

摘要：The performance of introducing a free radical initiator into dealkylation-based visbreaking of heavy oil in the N2 or supercritical benzene (SCbenzene) medium was investigated. Calculations based on density functional theory show that the introduction of di-tert-butyl peroxide (DTBP) into heavy oil visbreaking results in the formation of alkyl C radicals similar to those naturally formed in high temperature initiation. The visbreaking in SCbenzene environment is sensitive to the introduction of DTBP, which is different from the visbreaking in N-2 environment. According to reaction kinetics analysis, the presence of SCbenzene solvent and the introduction of DTBP greatly accelerate the dealkylation related lumped reactions. Benefiting from improved diffusion environment, the superimposed radicals resulting from DTBP introduction effectively participate in visbreaking and selectively accelerate dealkylation. After only 10-20 min of reaction at 380 ?C, visbreaking products with satisfactory viscosity reduction, reduced asphaltene content and improved light component yield can be obtained.