Demulsification Behavior, Characteristics, and Performance of Surfactant Stabilized Oil-in-Water Emulsion under Bidirectional Pulsed Electric Field

作     者：Ren Boping Kang Yong Zhang Xianming Gong Haifeng Chen Ling Liu Yunqi Ren Boping;Kang Yong;Zhang Xianming;Gong Haifeng;Chen Ling;Liu Yunqi

作者机构：Engineering Research Center for Waste Oil Recovery Technology and EquipmentMinistry of EducationChongqing Technology and Business UniversityChongqing 400067China School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580China 

出 版 物：《China Petroleum Processing & Petrochemical Technology》 (中国炼油与石油化工（英文版）)

年 卷 期：2023年第25卷第1期

页      面：10-22页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0820[工学-石油与天然气工程] 0821[工学-纺织科学与工程] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Scientific Platform Project of the Ministry of Education(fykf201907) the Postdoctoral Science Foundation Project of the Natural Science Foundation of Chongqing Municipality(cstc2021jcyjbshX0194) Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN202100820 and KJZD-K201900804) Science and Technology Innovation Project of the Construction of the Chengdu-Chongqing Economic Circle of Chongqing Municipal Education Commission(KJCX2020036) Scientific Research Project of Chongqing Technology and Business University(2152016 and 2056006) Chongqing Technical Innovation and Application Project(cstc2019jscx-msxmX0275) 

主　　题：oil-in-water emulsion surfactant demulsification bidirectional pulsed electric field 

摘      要：As a novel electric demulsification method,bidirectional pulsed electric field(BPEF)was employed to demulsify the surfactant stabilized oil-in-water(SSO/W)emulsion for oil/water separation in this *** demulsification behavior,characteristics,and stages under BPEF were *** was discovered that BPEF drove SSO/W emulsion to move and form vortexes,during which the oil droplets aggregated and accumulated to generate an oil droplet layer(ODL).ODL subsequently transformed into a continuous oil layer(COL)leading to the demulsification and separation of SSO/W *** conversion rate of ODL to COL was defined and used to evaluate the demulsification process and reflect the coalescence ability and transformation efficiency of dispersed oil droplets into ***,the effects of BPEF voltage,frequency,duty cycle,ratio of pulse output time,and surfactant type and content on the demulsification performance were *** optimal values of BPEF parameters for demulsification operation were 400 V,25 Hz,50%,and 4:1.O/W emulsion containing anionic surfactant was apt to be demulsified by BPEF,nonionic surfactant took the second place and cationic surfactant was the most difficult.A high surfactant content was not conducive to the BPEF *** work is anticipated to provide useful guidance for oil/water separation and oil recovery from actual emulsified oily wastewater by BPEF.