A thermodynamic model for structure-H hydrates

Journal Article · Tue Feb 01 04:00:00 EST 1994 · AIChE Journal (American Institute of Chemical Engineers); (United States)

DOI:https://doi.org/10.1002/aic.690400210· OSTI ID:7237577

Mehta, A P; Sloan, E D ^[1]

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1. Colorado School of Mines, Golden, CO (United States). Chemical Engineering and Petroleum-Refining Dept.

A statistical thermodynamics model based on the original work of van der Waals and Platteeuw is presented for structure-H hydrates. The model is an extension of the hydrate prediction method generalized by Parrish and Prausnitz for structure-I and II hydrates. Four structure-H-forming systems, methane + adamantane, methane + neohexane, methane + isopentane, and methane + methylcyclohexane, were considered. Optimized Kihara core parameter are presented for each of the large hydrocarbon guest molecules. The optimized reference chemical potential difference and reference enthalpy difference for structure-H hydrates are also presented. The results show good agreement with the experimentally determined phase-equilibria conditions. A sensitivity analysis is presented for the parameters in the model, and their relative order of influence on the accurate evaluation of the equilibrium pressure is determined.

• OSTI ID: 7237577
• Journal Information: AIChE Journal (American Institute of Chemical Engineers); (United States), Journal Name: AIChE Journal (American Institute of Chemical Engineers); (United States) Vol. 40:2; ISSN 0001-1541; ISSN AICEAC
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
033000* -- Natural Gas-- Properties & Composition
CRYSTAL STRUCTURE
GAS HYDRATES
HYDRATES
MATHEMATICAL MODELS
PARAMETRIC ANALYSIS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES