Research into the Polynomial Alpha Function for the Cubic Equation of State,Industrial & Engineering Chemistry Research

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Research into the Polynomial Alpha Function for the Cubic Equation of State
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-09-16 , DOI: 10.1021/acs.iecr.8b02549
Wenying Zhao ₁ , Xiaoyan Sun ₁ , Li Xia ₁ , Shuguang Xiang ₁

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Alpha functions usually aim at predicting the thermodynamic properties of specific compounds in a limited range of reduced temperatures. The differences between polynomial alpha functions are mainly the functional forms and the parameter correlations. In this work, the functional forms, the parameter correlations, and the scope of 64 polynomial alpha functions are reviewed. The inherent relationships between the polynomial alpha functions as well as developing trends are also discussed. These functions were modified by changing the coefficients, exponents, or variable terms. The parameter formulas were re-correlated with the acentric factors or the other natural parameters. In recent years, research into polynomial alpha functions has mainly focused on reservoir fluids, and the alpha functions have been modified by adding characteristic constants of pseudo-components to the equations or the parameter correlations. The Soave-type function has significant research value and will influence the development of polynomial alpha functions in the coming years.

中文翻译：

三次状态方程的多项式Alpha函数研究

Alpha函数通常旨在预测特定化合物在有限的降低温度范围内的热力学性质。多项式α函数之间的差异主要是函数形式和参数相关性。在这项工作中，功能形式，参数相关性和64个多项式alpha函数的范围进行了审查。还讨论了多项式α函数之间的内在联系以及发展趋势。通过更改系数，指数或变量项来修改这些函数。参数公式与中心因子或其他自然参数重新相关。近年来，对多项式alpha函数的研究主要集中在储层流体，通过将伪分量的特征常数添加到方程式或参数相关性来修改α函数和α函数。Soave型函数具有重要的研究价值，并将在未来几年内影响多项式alpha函数的发展。

更新日期：2018-09-17

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