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Understanding the polydisperse behavior of asphaltenes during precipitation

机译：了解沉淀过程中沥青质的多分散行为

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摘要

Asphaltenes are a polydisperse fraction of the crude oil, the phase behavior of which is significantly affected by the changes in pressure, temperature and composition. The focus of this study is to model the polydisperse asphaltenes' precipitation onset condition and the amount of precipitate from solvent-diluted crude oils using the Perturbed Chain form of the Statistical Associating Fluid Theory (PC-SAFT) over a wide range of crude oil density. Heavy oil and bitumen production can involve diluting with parafflnic solvents. Different fractions of the polydisperse asphaltenes thus precipitated are predicted and when compared to the experimental data show a remarkable matching for different solvents. A comparison of monodisperse and polydisperse modeling is also performed. This work illustrates the successful application of PC-SAFT for predicting the phase behavior of polydisperse asphaltenes and in particular from heavy oil and bitumen.
机译：沥青质是原油的一种多分散级分，其相态受压力，温度和组成变化的影响很大。本研究的重点是在广泛的原油密度范围内使用统计缔合流体理论（PC-SAFT）的扰动链形式对多分散沥青质的沉淀起始条件和溶剂稀释的原油中的沉淀量进行建模。 。重油和沥青生产可能涉及用石蜡溶剂稀释。预测了如此沉淀的多分散沥青质的不同馏分，当与实验数据比较时，显示出对于不同溶剂的显着匹配。还对单分散和多分散建模进行了比较。这项工作说明了PC-SAFT在预测多分散沥青质（尤其是重油和沥青）的相行为方面的成功应用。

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  • 来源
    《Fuel》 |2014年第ptaa期|206-217|共12页
  • 作者

    Mohammad Tavakkoli; Sai R. Panuganti; Vahid Taghikhani; Mahmoud Reza Pishvaie; Walter G. Chapman;

  • 作者单位

    Department of Chemical and Biomolecular Engineering, Rice University, Houston, USA,Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran;

    Department of Chemical and Biomolecular Engineering, Rice University, Houston, USA;

    Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran;

    Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran;

    Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Asphaltenes; Polydisperse; Phase behavior; PC-SAFT;

    机译：沥青质多分散;相行为;个人电脑;

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