Detailed analysis of single drop coalescence-Influence of ions on film drainage and coalescence time
Detailed analysis of single drop coalescence-Influence of ions on film drainage and coalescence time
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DOI：
10.1016/j.cherd.2016.09.037
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发表时间：
2016-11-01
影响因子：
3.9
通讯作者：
Bart, Hans-Joerg
中科院分区：
文献类型：
--
作者：
Gebauer, Felix;Villwock, Joern;Bart, Hans-Joerg
液-液系统中的聚结由多个因素决定，包括液滴尺寸比以及存在的任何连续相离子的浓度和类型。当使用标准化的EFCE（欧洲化学工程联合会）甲苯/水标准测试系统时，基于高度统计相关的数据库系统地研究了这些因素。用高速成像系统捕获对膜排水时间的影响。较短的聚结时间被发现与较高的聚结概率和观察到的增加，聚结时间与液滴直径的增加与简单的排水建模一致。加入连续相电解质也能抑制聚结。建立了一个经验关联式，考虑了等效液滴直径和离子浓度对聚结时间的影响。(C)2016化学工程师学会。Elsevier B. V.出版，保留所有权利。
Coalescence in liquid-liquid systems is determined by multiple factors, including droplet size ratios and the concentration and type of any continuous phase ions present. When using the standardized EFCE (European Federation of Chemical Engineering) toluene/water standard test system, these factors were systematically investigated based on a high statistical relevant database. The influence on the film drainage time was captured with a high speed imaging system. Shorter coalescence times were found to correlate with higher coalescence probabilities and an observed increase in,the coalescence time with increasing droplet diameter agrees well with simple drainage modeling. Coalescence inhibition was also observed with the addition of continuous phase electrolyte. An empirical correlation was developed to account for the influence of equivalent droplet diameter and ion concentration on the coalescence time. (C) 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.