Cubic plus association equation combining rules

Combining rules given by eqs 5.200 and 5.201 have been used with the cubic plus association equation. Wolbach and Sandler provided ah initio justification for eq 5.200. For (methanol-1-water) Koh et al also validated the use of either eq 5.198 or 5.200. For (vapour- -liquid), (liquid-I-liquid) and (solid-I-liquid) equilibria ref 189 lists the eombining rules preferred for 18 cross-associating mixtures. 

Derawi et a/. " found eqs 5.197 and 5.199 were preferred for the optimal representation of the phase boundaries for (methanol + water), (ethane-1,2-diol -l-waer), (2-hydroxyethoxy)ethan-2-ol - -water and (2-[2-(2-hydroxyethoxy) ethoxyjethanol + water) ref. 201 defines the acronyms for the combining rules used in the literature. The phase boundaries of (water -I- ethanol + CO2) were considered in the context of the cubic plus association equation by Perakis et with combining rules given by eqs 5.198 and eqs 5.199 where the expression for included an additional interaction parameter ly as a multiplying factor (1 /y) the parameters kij and ly are adjusted to reproduee the... 

The cubic plus association equation has been applied to oil reservoir hydrocarbons with the ubiquitous water using the combining rule given by eq 5.200. The phase equilibria of (water- -CO2) is important for carbon sequestration in geological formations and requires methods to predict the phase boundaries and solubility. Pappa et al estimated the phase boundaries... 

For mixtures of hydrocarbons and alcohols, often involved in hydrate inhibition, the cubic plus association equation of state has been used to estimate the (vapour + liquid) and (liquid-b Uquid) equilibria. In both cases no combining rules are needed for the association parameters and for (alcohol + hydrocarbon). 

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