Solubility of the Least-Soluble Asphaltenes
Solubility of the Least-Soluble Asphaltenes
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DOI：
10.1007/0-387-68903-6_16
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发表时间：
2007
期刊：
影响因子：
5.3
通讯作者：
J. Buckley;Jianxin Wang;J. Creek
中科院分区：
文献类型：
--
作者：
J. Buckley;Jianxin Wang;J. Creek
了解许多与沥青质有关的现象的关键是定量描述原油中最难溶解的沥青质开始凝聚的溶解条件，这通常被称为凝聚开始。将沥青质絮凝处理为分散在由小得多的分子组成的溶剂中的大溶质分子的液-液相分离的模型可以成功地描述溶解条件因压力和组成的变化而变化的实验观察。胶体尺寸(纳米量级)的细小、分散良好的沥青质聚集体的形成不会使模拟沥青质相行为的热力学方法失效。
AbstractThe key to understanding many asphaltene-related phenomena is a quantitative description of the solubility conditions at which the least-soluble asphaltenes begin to flocculate from a crude oil, often referred to as the onset of flocculation. Models that treat asphaltene flocculation as a liquid–liquid phase separation of large solute molecules dispersed in a solvent composed of much smaller molecules can successfully describe experimental observations in which solubility conditions vary due to changes in pressure and composition. Formation of small, well-dispersed asphaltene aggregates of colloidal dimensions (on the order of nanometers) does not invalidate the thermodynamic approach to modeling asphaltene phase behavior.