二元混合物的临界行为:用Heidemann-Khalil方法计算

IF 1.1 4区工程技术 Q4 Engineering

High Temperatures-high Pressures Pub Date : 2020-01-01 DOI:10.32908/hthp.v48.799

H. Grine, H. Madani, Saida Fedali

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引用次数: 0

摘要

临界温度和临界压力是表征某一流体特性的两个重要参数。本文研究了24种含烃衍生物、二氧化碳和醇的二元混合物的临界点。计算采用Heidemann-Khalil方法，结合以下状态方程(Eos): van der Waals (vdW)， Soave-Redlich-Kwong (SRK)和Peng-Robinson (PR)。采用牛顿-拉夫森方法求解了包含三个自变量(摩尔分数x、温度T和体积V)的一组非线性方程。将预测数据与现有参考数据进行比较，以评估所采用热力学模型的准确性。模拟数据的平均绝对相对误差(AARE)在临界温度和临界压力下分别小于0.2%和3%。模型预测结果与参考数据吻合较好。

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Critical behaviour of binary mixtures: Calculation by the Heidemann-Khalil method

The critical temperature and critical pressure are two important parameters to characterize a particular fluid. In this paper, we have studied the critical points of 24 binary mixtures containing hydrocarbon derivatives, carbon dioxide and alcohols. Computations were performed using the Heidemann-Khalil method, combined with the following equations of state (Eos): van der Waals (vdW), Soave-Redlich-Kwong (SRK) and Peng-Robinson (PR). The Newton-Raphson method was used to solve a set of nonlinear equations in three independent variables (molar fraction x, temperature T and volume V). Comparisons between predicted and available reference data are given to evaluate the accuracy of the thermodynamic model employed. The average absolute relative error (AARE) of the simulated data was less than 0.2% for critical temperature and 3% for critical pressure. A good agreement has been found between model prediction and reference data.

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来源期刊

High Temperatures-high Pressures THERMODYNAMICS-MECHANICS

CiteScore

1.00

自引率

9.10%

发文量

期刊介绍： High Temperatures – High Pressures (HTHP) is an international journal publishing original peer-reviewed papers devoted to experimental and theoretical studies on thermophysical properties of matter, as well as experimental and modelling solutions for applications where control of thermophysical properties is critical, e.g. additive manufacturing. These studies deal with thermodynamic, thermal, and mechanical behaviour of materials, including transport and radiative properties. The journal provides a platform for disseminating knowledge of thermophysical properties, their measurement, their applications, equipment and techniques. HTHP covers the thermophysical properties of gases, liquids, and solids at all temperatures and under all physical conditions, with special emphasis on matter and applications under extreme conditions, e.g. high temperatures and high pressures. Additionally, HTHP publishes authoritative reviews of advances in thermophysics research, critical compilations of existing data, new technology, and industrial applications, plus book reviews.