New Functionality for Energy Parameter of Redlich-Kwong Equation of State for Density Calculation of Pure Carbon Dioxide and Ethane in Liquid, Vapor and Supercritical Phases

Authors

  • Hossein Rostamian
    Affiliation

    Faculty of Chemical, Petroleum and Gas Engineering, Semnan University

  • Mohammad Nader Lotfollahi
    Affiliation

    Faculty of Chemical, Petroleum and Gas Engineering, Semnan University

https://doi.org/10.3311/PPch.8221

Abstract

A new equation of state has been proposed for calculating densities of pure carbon dioxide and ethane in the liquid, vapor, and supercritical phases. In this equation of state, a new function (β function) for energy parameter of Redlich-Kwong equation of state has been used versus temperature and pressure. The constants of the β function were calculated by minimizing of average absolute relative deviation percent (AARD%) between calculation results and experimental densities data reported in literature. The data points used for optimization were 2770 for carbon dioxide in the ranges of (220-1273) K for temperature and (8- 2000) bar for pressure and 2002 for ethane in the ranges of (95-625) K and (2-700) bar. The densities calculated by the proposed EoS (βRK-EoS) were in good agreement with experimental densities with AARD% of 1.68 and 0.49 for ethane and carbon dioxide, respectively.

Keywords:

Density calculation, βRK-EoS, Ethane, Carbon dioxide

Published Online

2015-08-27

How to Cite

Rostamian, H., Lotfollahi, M. N. “New Functionality for Energy Parameter of Redlich-Kwong Equation of State for Density Calculation of Pure Carbon Dioxide and Ethane in Liquid, Vapor and Supercritical Phases”, Periodica Polytechnica Chemical Engineering, 60(2), pp. 93–97, 2016. https://doi.org/10.3311/PPch.8221

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Section

Articles