New simple and generalized model to estimate the vapor pressure of light hydrocarbons
DOI:
https://doi.org/10.18041/1909-2458/ingeniare.20.409Abstract
A new equation for light hydrocarbon is proposed for the estimation of vapor pressure, applicable in wide temperature range. Was used equilibrium liquid-vapor data with 19 low molecular weight hydrocarbons and using Lasdon et al., algorithm which minimize the sum of the squares of the relative deviation in liquid-vapour pressure were determined the parameters and constants characteristics of the new equation and generalized for any pure substance using the acentric factor. To validate the new model, vapour pressure predictions were made for 54 pure substances between alco-hols, hydrocarbons, refrigerants, noble gases and inorganic substances, generated percent relative average deviation of 1.504%. The results were compared with other equations and the comparison indicates that the proposed method provide more accurate results than other methods used in this work.
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References
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