Prediction of Vapor−Liquid Equilibria with the LCVM Model:  Systems Containing Light Gases with Medium and High Molecular Weight Compounds

The LCVM model (Boukouvalas et al., 1994) is applied to the prediction of vapor−liquid equilibria (VLE) for a variety of binary, ternary, and multicomponent mixtures involving gaseous components (CH 4, H 2 S, C 2 H 6, C 3 H 8, and CO 2 ) with medium and high molecular weight hydrocarbons and/or polar compounds. New interaction parameters (CH 4 /−CH 2 O−, CH 4 /−OCCOH, and CH 4 /gases) are evaluated, and some existing ones (H 2 S/−CH 2 −, CH 4 /ACH, CH 4 /ACCH 2, and C 2 H 6 /ACCH 2 ) are reevaluated by using additional data. Very satisfactory results are obtained in all cases, even for asymmetric systems, where the MHV2 model (Dahl et al., 1991) fails. Of special interest are the successful results for the multicomponent systems that involve up to 24 components, including a H 2 S-rich sour gas mixture. LCVM is, thus, a powerful model for the prediction of VLE for a broad range of binary and multicomponent systems.