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Modification of a thermodynamic model and an equation of state for accurate calculation of asphaltene precipitation phase behavior

机译：修正热力学模型和状态方程以精确计算沥青质沉淀相行为

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In this study, DPTG (Dashtizadeh-Pazuki-Taghikhani-Ghotbi) equation of state has been modified for calculation of phase behavior of fluids and solubility parameter. The accuracy of the modified EOS has been proved by estimation of the properties of some hydrocarbons such as densities of methane and condensate gases, vaporization enthalpy, sublimation pressure, compressibility factor and comparison of the obtained results with the results of the present equations of state such as NJ (Nasrifar-Jalali), ZMJL (Zhi-Mei-ren-Jun-Lee) and PR (Peng-Robinson). Then, the Flory-Huggins model has been modified and asphaltene precipitation phase behavior at different ratios of solvents in the crude oil has been predicted by the modified EOS and the developed Flory-Huggins model. Comparison of the obtained results with the experimental data of asphaltene precipitation and the calculated ones by the main Flory-Huggins model shows the accuracy of the developed model.
机译：在这项研究中，DPTG（Dashtizadeh-Pazuki-Taghikhani-Ghotbi）状态方程已被修改，以计算流体的相行为和溶解度参数。通过估算某些碳氢化合物的性质（例如甲烷和冷凝气体的密度，汽化焓，升华压力，可压缩系数）并将所得结果与当前状态方程的结果进行比较，证明了改性EOS的准确性。分别是NJ（Nasrifar-Jalali），ZMJL（Zhi-Mei-ren-Jun-Lee）和PR（Peng-Robinson）。然后，改进了Flory-Huggins模型，并通过改进的EOS和改进的Flory-Huggins模型预测了原油中不同溶剂比例下的沥青质沉淀相行为。将所得结果与沥青质沉淀的实验数据和主要的Flory-Huggins模型计算的结果进行比较，表明了该模型的准确性。

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