Thermodynamic calculations in the system CH(sub 4)-H(sub 2)O and methane hydrate phase equilibria

Article Abstract:

A classical thermodynamic model, using experimentally determined data for phases in the system CH(sub 4)-H(sub 2)O, was developed and used to calculate the phase equilibria of methane hydrate over a wide range of geologically relevant P (Pressure) and T (temp) conditions. The results from the classical thermodynamic model are wholly consistent with little or no variation in hydrate number over a wide range of P and T conditions and are in agreement with the directly measured compositions between 2 and 10 MPa.

Methane, Thermal properties, Thermodynamics, Phase rule and equilibrium, Phase equilibrium

---

Direct measurement of methane hydrate composition along the hydrate equilibrium boundary

Article Abstract:

The composition of methane hydrate, namely n(sub w) for CH4.n(sub w)H2O, is directly measured along the hydrate equilibrium boundary under conditions of excess methane gas. A hydrate stoichiometry of n(sub w)= 5.81-6.10 H2O describes the entire range of measured values, with an average composition of CH4.5.99(plusmn0.07)H2O along the equilibrium boundary.

Stoichiometry, Methyl groups, Methyl compounds

---

The role of water in gas hydrate dissociation

Article Abstract:

The thermal buffering behavior during dissociation of sI carbon dioxide (CO2) hydrate, as well as structure sII methane-ethane hydrate (ClC2) and SII propane (C3) hydrate at 0.1 Mpa are discussed. The relationship between hydrate dissociation and buffering temperature for these various hydrates near T(sub m) is presented.

Science & research, Research, Water, Natural gas, Gas hydrates, Dissociation, Dissociation reactions, Buffers (Chemistry), Dibromopropanol phosphate

Similar abstracts:

• Abstracts: Density functional calculations of ATP systems. 1. Crystalline ATP hydrates and related molecules. ATP hydrolysis in water- a density functional study
• Abstracts: Physico-chemical investigation of the state of cyanamide confined in AOT and lecithin reversed micelles
• Abstracts: An explicit relationship between the dielectric anisotropy and the average electric field gradient in nematic solvents
• Abstracts: Counterion effect on the thermodynamics of micellization of alkyl sulfates. Synthetic macroporous silicas with multilamellar structure
• Abstracts: Carbon incorporation in Pd(111) by adsorption and dehydrogenation of ethene. Trends in the chemisorption of aromatic molecules on a Pt(111) surface: benzene, naphthalene, and anthracene from first principles calculations

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.