Collect. Czech. Chem. Commun. 1994, 59, 1038-1051

Application of a New Algorithm for Prediction and Modelling of Multiphase Behavior: A Case Study of Some Prototype Natural Gas Systems

Roumiana P. Stateva and Stefan G. Tsvetkov

Institute of Chemical Engineering, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria


The prediction and modelling are studied of complex multiphase behavior of four prototype ternary mixtures typically encountered in cryogenic processing of natural gases, with a new approach for solving the isothermal multiphase flash problem. The method includes a rigorous method for thermodynamic stability analysis as the first step and an efficient phase identification procedure as the second. The new algorithm provides an accurate global description of phase behavior of the studied LNG systems, and excellent agreement of the results obtained with experimental data.