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Received January 29, 2008
Accepted April 13, 2008
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A new vapor pressure equation for pure substances
Simulation and AI Research Center, Department of Chemical Engineering, Razi University, Kermanshah, Iran
Korean Journal of Chemical Engineering, November 2008, 25(6), 1514-1517(4), 10.1007/s11814-008-0249-1
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Abstract
A new simple equation for prediction of vapor pressure of pure substances is proposed. The equation which has the Clausius-Clapeyron (C-C) equation form consists of three parameters: critical temperature, critical pressure and normal boiling point. Experimental data for organic and inorganic substances have been used to calculate equation parameters in the boiling point ranges from 169.45 to 457.55 K and critical temperature ranges from 282.75 to 699.15 K. Comparison of proposed equation estimation results with experimental data shows that the new equation has minor average error. The new equation is also 68 percent more accurate than the C-C equation
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Daubert TE, Jones DK, Pure component liquid vapor pressure measurements, Project 821, AIChE Symp., Ser. 86, (1990)
Reinhard M, Drefahl A, Handbook for estimating physicochemical properties of organic compounds, Wiley & Sons, New York (1999)
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