文献类型：期刊文献

英文题名：Breakup Characteristics of Water-in-Oil Emulsion Droplets Influenced by a Rigid Interfacial Film in the Presence of a Polymer Surfactant

作者：Gao, Jingjing[1,2];Xu, Xiaobin[3];Li, Tao[1,2];Zhang, Hongyu[3];Xu, Jun[1,2];Cao, Fahai[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Energy Chem Engn Minist Educ, Shanghai 200237, Peoples R China;[3]Sinopec Qilu Co, Zibo 255400, Peoples R China

年份：2022

卷号：36

期号：8

起止页码：4339

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20221712011642);WOS:【SCI-EXPANDED(收录号:WOS:000793737800013)】；

基金：The authors would like to thank the Sinopec Innovation Foundation for funding this project under the grant number 120022. The authors thank the China University of Mining and Technology for the support with the interfacial rheometer and Sinopec Qilu Company for providing technological supports.

语种：英文

外文关键词：Crude oil - Ionic strength - Feedstocks - Fluid catalytic cracking - Heavy oil production - Ostwald ripening - Surface active agents - Emulsification - Expansion

摘要：The emulsified feedstock technique derived frommicro-explosion has been applied to improve the feedstock atom-ization of heavy oil during the catalytic cracking process. The strengthof an interfacialfilm, which is vital for the stability of emulsion, can beenhanced by some polymer surfactants. In this study,n-hexadecanewas chosen as the model oil. The effect of oil-water interfacialfilmproperties on the high-temperature breakup of emulsified droplets wasinvestigated, especially the interfacialfilm strength of water-in-oil (W/O) emulsion in the presence of a commonly used non-ionic surfactantand/or polymer surfactant (Arlacel-P135). The mean diameter ofdispersed water and interfacial tension and interfacialfilm strength ofemulsions were measured. Afterward, two breakup modes of emulsifieddroplets were revealed by the single droplet heating test, which are"micro-explosion"and"breakup after bubble expansion". Theemulsified droplet stabilized by Arlacel-P135 is more prone to"breakup after bubble expansion"for the rigid oil-water interfacialfilm hindering the coalescence of dispersed water. The stability and oil-water interfacial strength of emulsions stabilized by mixedsurfactants consisting of Span80, Tween80, and Arlacel-P135 were enhanced with the increase in Arlacel-P135 dosage. Moreover,the addition of Arlacel-P135 (0.2-0.5 wt %) significantly reduced the average breakup delay time (Tau) of W/O droplets, since thebubble nucleation was favored by the interfacialfilm structure formed by polymer surfactant.