Enhanced effectiveness of oil dispersants in destabilizing water-in-oil emulsions
Enhanced effectiveness of oil dispersants in destabilizing water-in-oil emulsions
复制标题
增强油分散剂使油包水乳液不稳定的效果
作者：
G. John;J. Hayworth
2010 年深水地平线事故影响墨西哥湾北部海岸线的石油主要以油包水乳液 (WOE) 的形式存在，这是一种经过化学风化的高粘度、中性浮力材料。一旦形成，WOE 就很难破坏稳定。由于分散剂表面活性剂无法取代稳定油水界面的沥青质，因此市售的油分散剂基本上是无效的破乳剂。本研究调查了市售分散剂 Corexit 9500A（经过改进以提高其极性分数）在破坏 WOE 稳定性方面的有效性。结果表明，将 Corexit 修改为包含 20-60% 的极性添加剂（1-辛醇或己胺）将适度增加 WOE 不稳定性，Corexit 与己胺的比例约为 80/20，可提供最有效的增强去稳定性。结果支持这样的假设：改变商业分散剂中极性成分的比例将增加沥青质溶解度，降低油水界面稳定性，并增强 WOE 不稳定性。
Oil impacting the northern Gulf of Mexico shoreline from the 2010 Deepwater Horizon accident was predominantly in the form of water-in-oil emulsions (WOE), a chemically weathered, highly viscous, neutrally buoyant material. Once formed, WOE are extremely difficult to destabilize. Commercially-available oil dispersants are largely ineffective de-emulsifiers as a result of the inability of dispersant surfactants to displace asphaltenes stabilizing the oil-water interface. This study investigated the effectiveness of the commercially-available dispersant Corexit 9500A, modified to enhance its polar fraction, in destabilizing WOE. Results suggest that Corexit modified to include between 20–60% fractional amount of either polar additive (1-octanol or hexylamine) will produce a modest increase in WOE instability, with a Corexit to hexylamine ratio of approximately 80/20 providing the most effective enhanced destabilization. Results support the hypothesis that modifying the fraction of polar constituents in commercial dispersants will increase asphaltene solubility, decrease oil-water interface stability, and enhance WOE instability.
影响因子：
6.7
作者：
Liu, Zhanfei;Liu, Jiqing;Wu, Wei
通讯作者：
Wu, Wei