Vapor-Hydrate Equilibrium Ratio Charts for Heavy Hydrocarbon Compounds. 1. Structure-II Hydrates: Benzene, Cyclopentane, Cyclohexane, and Neopentane

Bahman Tohidi, Ali Danesh, Ali R. Tabatabaei, Adrian C. Todd

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The most successful empirical method for predicting hydrate-phase equilibrium in water-hydrocarbon system is based upon vapor-solid equilibrium ratio (Kvs values) correlations. Equilibrium ratio charts for known hydrate formers, with n-butane as the heaviest compound, are available in the literature. With the discovery of heavier hydrate-forming compounds, their equilibrium ratio charts are required for reliable prediction of the hydrate-free zone of hydrocarbon mixtures, particularly reservoir fluids. In this work, an in-house thermodynamic model, validated against experimental hydrate equilibrium data of four structure-II heavy hydrate formers (HHF), benzene, cyclopentane, cyclohexane, and neopentane, has been used for generating their Kvs value charts. The resulting Kvs values have been used in predicting a hydrate-free zone of binary and ternary mixtures of HHF with methane and/or nitrogen, demonstrating success when compared with experimental data.

Original languageEnglish
Pages (from-to)2871-2874
Number of pages4
JournalIndustrial and Engineering Chemistry Research
Volume36
Issue number7
Publication statusPublished - Jul 1997

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