期刊
AICHE JOURNAL
卷 56, 期 11, 页码 2965-2982出版社
WILEY-BLACKWELL
DOI: 10.1002/aic.12207
关键词
equations of state; acid gases; association; H2S
资金
- Statoil and Gassco (Norway)
- BP (UK, USA)
- TOTAL (France)
- Maersk Oil and Gas (Denmark)
The Cubic-Plus-Association (CPA) equation of state is applied to a large variety of mixtures containing H2S, which are of interest in the oil and gas industry. Binary H2S mixtures with alkanes, CO2, water, methanol, and glycols are first considered. The interactions of H2S with polar compounds (water, methanol, and glycols) are modeled assuming presence or not of cross-association interactions. Such interactions are accounted for using either a combining rule or a cross-solvation energy obtained from spectroscopic data. Using the parameters obtained from the binary systems, one ternary and three quaternary mixtures are considered. It is shown that overall excellent correlation for binary, mixtures and satisfactory prediction results for multicomponent systems are obtained. There are significant differences between the various modeling approaches and the best results are obtained when cross association is explicitly accounted for, especially using the cross-association energy from independent experimental studies rather than from combining rules. (C) 2010 American Institute of Chemical Engineers AIChE J, 56: 2965-2982, 2010
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