Breakdown mechanism and application of high frequency pulsed electric field-demulsifier combination on water-in-oil emulsion

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2024-11-26 DOI:10.1016/j.colsurfa.2024.135846

Tao Liu , Bauyrzhan Sarsenbekuly , Wanli Kang

{"title":"Breakdown mechanism and application of high frequency pulsed electric field-demulsifier combination on water-in-oil emulsion","authors":"Tao Liu , Bauyrzhan Sarsenbekuly , Wanli Kang","doi":"10.1016/j.colsurfa.2024.135846","DOIUrl":null,"url":null,"abstract":"<div><div>High-frequency pulse electric dehydration technology gradually replaced AC (alternating current) and DC (direct current) dehydration because of its technical advantages such as low energy consumption and no electric field collapse. In this paper, a high frequency pulsed electric field-demulsifier combined dehydration technology was proposed. The dehydration performance of high frequency pulsed electric field and the demulsification of high frequency pulsed electric field-demulsifier combined action were analyzed. The effects of pulse amplitude, pulse width ratio, pulse frequency and dehydration time on the dehydration rate of simulated emulsion under high frequency pulsed electric field were discussed, and the optimal electric dehydration parameters were selected. The results show that for the simulated FY crude oil emulsion with a water content of 25 %, the optimal dehydration conditions are pulse amplitude of 1320 V, frequency of 3.86 kHz, pulse width ratio of 75 %, demulsifier AR919 concentration of 60 mg/L, dehydration temperature of 55 °C, and dehydration time of 10 min. Through the study of microscopic water droplet breakdown, the breakdown mechanism of pulsed electric field was revealed: Accumulation by electrophoresis, Dipole coalescence, Accumulation by oscillating. The demulsifier reduced the optimal pulse frequency and pulse width ratio of the pulsed electric field to the demulsification and dehydration of the emulsion, but had no effect on the optimal pulse amplitude. At the same time, the advantages of high frequency pulse electric demulsification in saving energy were calculated. The results show that the dehydration performance of high frequency pulse electric field is much higher than that of AC and DC electric field, and the energy consumption is saved by more than 90 %. The field application also achieved good results.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"707 ","pages":"Article 135846"},"PeriodicalIF":4.9000,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0927775724027109","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

High-frequency pulse electric dehydration technology gradually replaced AC (alternating current) and DC (direct current) dehydration because of its technical advantages such as low energy consumption and no electric field collapse. In this paper, a high frequency pulsed electric field-demulsifier combined dehydration technology was proposed. The dehydration performance of high frequency pulsed electric field and the demulsification of high frequency pulsed electric field-demulsifier combined action were analyzed. The effects of pulse amplitude, pulse width ratio, pulse frequency and dehydration time on the dehydration rate of simulated emulsion under high frequency pulsed electric field were discussed, and the optimal electric dehydration parameters were selected. The results show that for the simulated FY crude oil emulsion with a water content of 25 %, the optimal dehydration conditions are pulse amplitude of 1320 V, frequency of 3.86 kHz, pulse width ratio of 75 %, demulsifier AR919 concentration of 60 mg/L, dehydration temperature of 55 °C, and dehydration time of 10 min. Through the study of microscopic water droplet breakdown, the breakdown mechanism of pulsed electric field was revealed: Accumulation by electrophoresis, Dipole coalescence, Accumulation by oscillating. The demulsifier reduced the optimal pulse frequency and pulse width ratio of the pulsed electric field to the demulsification and dehydration of the emulsion, but had no effect on the optimal pulse amplitude. At the same time, the advantages of high frequency pulse electric demulsification in saving energy were calculated. The results show that the dehydration performance of high frequency pulse electric field is much higher than that of AC and DC electric field, and the energy consumption is saved by more than 90 %. The field application also achieved good results.

查看原文本刊更多论文

高频脉冲电场-乳化剂组合在油包水乳液中的分解机理和应用

高频脉冲电脱水技术因其能耗低、无电场崩溃等技术优势，逐渐取代了交流（交流电）和直流（直流电）脱水技术。本文提出了一种高频脉冲电场-乳化剂组合脱水技术。分析了高频脉冲电场的脱水性能和高频脉冲电场-乳化剂联合作用的破乳化性能。讨论了脉冲振幅、脉宽比、脉冲频率和脱水时间对高频脉冲电场下模拟乳液脱水率的影响，并选择了最佳电脱水参数。结果表明，对于含水率为 25% 的模拟 FY 原油乳状液，最佳脱水条件为脉冲幅值为 1320 V，频率为 3.86 kHz，脉宽比为 75%，破乳化剂 AR919 浓度为 60 mg/L，脱水温度为 55 °C，脱水时间为 10 min。通过对微观水滴分解的研究，揭示了脉冲电场的分解机理：电泳积累、偶极子凝聚、振荡积累。破乳剂降低了脉冲电场对乳液破乳和脱水的最佳脉冲频率和脉宽比，但对最佳脉冲幅值没有影响。同时，计算了高频脉冲电破乳法在节能方面的优势。结果表明，高频脉冲电场的脱水性能远高于交直流电场，能耗节省 90% 以上。现场应用也取得了良好的效果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.