文献类型：期刊文献

英文题名：Reaction kinetics analysis of heavy oil visbreaking with reduced diffusion limitation

作者：Zhang, Hua-Jie[1];Hu, Yu-Yang[2];Wang, Li-Tao[3];Zhu, Ya-Kun[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, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China;[3]Petrochina Petrochem Res Inst, Beijing 102249, Peoples R China

年份：2021

卷号：159

外文期刊名：JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS

收录：;EI(收录号：20213310786034);WOS:【SCI-EXPANDED(收录号:WOS:000697681400001)】；

基金：The authors acknowledge the supports from CNPC (Grant No. PRIKY19022), SINOPEC (Grant No. 120011) and NSFC (Grant No. 21676084).

语种：英文

外文关键词：Visbreaking; Heavy oil; Reaction kinetics; Diffusion limitation; Viscosity reduction; Upgrading

摘要：To understand the reaction behavior of heavy oil visbreaking with reduced diffusion limitation, the visbreaking of an atmospheric residual oil in the solvent of supercritical benzene (SCbenzene) was applied, followed by a reaction kinetics analysis based on a hybrid lumping with combination of boiling point distribution and group composition of oil components. The visbreaking under SCbenzene environment was found to be much faster than that under nitrogen environment, proceeding effectively even at a temperature lower to 350 degrees C. Although the dealkylation-based lumped reactions responsible for light component production and viscosity reduction are supposed to dominate the visbreaking, a competition between dealkylation and condensation exists throughout the visbreaking. Because of the reduced diffusion limitation to reaction kinetics, the condensation-based lumped reactions with a higher activation energy up to 306 kJ.mol- 1 respond more sensitively to the variation of reaction temperature, greatly shortening the reaction time window for the visbreaking at high temperatures.