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|標題:||Isothermal vapor-liquid equilibria for binary mixtures of hexane, heptane, octane, nonane and cyclohexane at 333.15 K, 343.15 K and 353.15 K||作者:||Lee, K.J.
|關鍵字:||Vapor-liquid equilibrium;Hexane;Heptane;Octane;Nonane;Cyclohexane;Density;Excess Gibbs energy;excess gibbs energy;systems;expression;equation;model;nrtl;co2||Project:||Journal of the Taiwan Institute of Chemical Engineers||期刊/報告no：:||Journal of the Taiwan Institute of Chemical Engineers, Volume 40, Issue 5, Page(s) 573-579.||摘要:||
Isothermal vapor-liquid equilibria at 333.15 K, 343.15 K and 353.15 K far four binary mixtures of hexane + heptane, heptane + octane, cyclohexane + octane and cyclohexane + nonane have been obtained at pressures ranged from 0 to 101.3 kPa. The NRTL, UNIQUAC and Wilson activity coefficient models have been employed to correlate experimental pressures and liquid mole fractions. The non-ideal behavior of the vapor phase has been considered by using the Soave-Redlich-Kwong equation of state in calculating the vapor mole fraction. Liquid and vapor densities were also measured by using two vibrating tube densitometers. Phase behaviors of the P-x-y diagrams indicate that three mixtures of hexane + heptane, heptane + octane, cyclohexane + octane were close to the ideal solution. However, the cyclohexane + nonane mixture presents a large positive deviation from the ideal solution. Only the cyclohexane + octane mixture is negative in the excess Gibbs energy indicates that it is an exothermic system. (C) 2009 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
|Appears in Collections:||化學工程學系所|
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