Experimental Investigation and Modeling of Activity Coefficient at Infinite Dilution of Solutes Using Dicationic Solvent Based on Pyrrolidinium as a New Stationary Phase in Gas Chromatography — Oak Academic Publishing
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Experimental Investigation and Modeling of Activity Coefficient at Infinite Dilution of Solutes Using Dicationic Solvent Based on Pyrrolidinium as a New Stationary Phase in Gas Chromatography
School of Mechanical Engineering, Iran University of Science and Technology (IUST), Tehran, Iran
,
Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran
,
Iranian Catalyst Development (ICD), Tehran, Iran
,
Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran
1 School of Mechanical Engineering, Iran University of Science and Technology (IUST), Tehran, Iran
2 Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran
3 Iranian Catalyst Development (ICD), Tehran, Iran
4 Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran
Activity coefficients at infinite dilution, γ ∞ i , were calculated for 12 solutes, with organic solutes including linear alcohols (methanol, ethanol, propanol), linear alkanes (heptane, octane), benzene, toluene, cyclohexane, 1, 2-dichloroethane, trichloroethylene, acetonitrile and carbon tetrachloride. The values of γ ∞ i were determined via either thermodynamic or artificial neural network modelling at different temperatures. A comparison between extracted results from these two methods confirmed that experimental and predicted results are roughly the same. The accuracy of predicted results proves this model is fully compatible with a wide range of solutes, and it can readily be used as an alternative to conventional gas-liquid chromatography for the measurements of activity coefficient at infinite dilution.
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