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Infinite dilution activity coefficients of solvents in fatty oil derivatives
Ferreira, Olga; Foco, Gloriahttp://apps.isiknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=8&SID=V21Di6PajaHLPoM3@AJ&page=1&doc=1&colname=WOS ; Inverse gas-liquid chromatography has been applied to measure infinite dilution activity coefficients (γ∞) of different solutes in low and high molecular weight triacylglycerides (TAGs) and in mixtures of carboxylic acids with TAGs. The γ∞ data obtained were used to determin...
Group contribution modeling of activity coefficients in associating solutions c...
Ferreira, Olga; Orge, Beatriz; Foco, Gloria; Bottini, Susana B.A modified UNIFAC group contribution model for the prediction of activity coefficients in associating solutions (A-UNIFAC) is applied to calculate phase equilibria in binary and ternary mixtures of associating and non-associating species, including alcohols, water, carboxylic acids, esters, alkanes, aromatic hydrocarbons and alkyl chlorides. Self- and cross-association in these mixtures is adequately described ...
Extension of UNIFAC to associating systems
Foco, Gloria; Ferreira, Olga; Brignole, Esteban A.; Bottini, Susana B.An extended UNIFAC group contribution model for the prediction of activity coefficients in associating mixtures was presented recently (Mengarelli et al.,1999). In the present work the model is applied to solutions containing alcohols, water, carboxylic acids and inert components. The residual UNIFAC local composition term is re-parameterized in order to take into account only dispersive forces between associat...
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