Improved Density Correlation for Supercritical CO 2 | Zendy

Wang Zhiyuan | Zendy; Sun Baojiang | Zendy; Yan Linlin | Zendy

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Improved Density Correlation for Supercritical CO 2

Author(s) -

Wang Zhiyuan,

Sun Baojiang,

Yan Linlin

Publication year - 2015

Publication title -

chemical engineering and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.403

H-Index - 81

eISSN - 1521-4125

pISSN - 0930-7516

DOI - 10.1002/ceat.201400357

Subject(s) - supercritical fluid , thermodynamics , equation of state , constant (computer programming) , chemistry , measure (data warehouse) , linear correlation , materials science , mathematics , physics , statistics , database , computer science , programming language

An experimental apparatus was designed to measure accurately the density of supercritical CO 2 in wide temperature and pressure ranges. Based on experimental results, the curves for CO 2 density as function of pressure at certain temperatures were divided into linear‐growth, rapid‐growth, and slow‐growth intervals. The relative error between the experimental and calculated density values for a number of frequently used equations of state was evaluated. These equations were corrected after analyzing the accuracy of each equation in the different intervals. A new method for calculating the density of supercritical CO 2 that includes 28 constant parameters is proposed to determine the density at a known temperature and pressure.

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