Thermophysical Properties, Hydrate and Phase Behaviour Modelling in Acid Gas‐Rich Systems

Chapoy, Antonin; Burgass, Rhoderick William; Tohidi, Bahman; Hajiw, Martha; Coquelet, Christophe

doi:10.1002/9781118938652.ch10

Cited by 2 publications

(1 citation statement)

References 30 publications

(35 reference statements)

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“…To date, many experimentalists have measured the solubility of methane, − ethane, , propane, ,− and butane in pure water and in NaCl solutions − at different temperatures, pressures, and molalities. Wilhelm et al .…”

Section: Introductionmentioning

confidence: 99%

Solubilities and Self-Diffusion Coefficients of Light n-Alkanes in NaCl Solutions at the Temperature Range (278.15–308.15) K and Pressure Range (1–300) bar and Thermodynamics Properties of Their Corresponding Hydrates at (150–290) K and (1–7000) bar

et al. 2023

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Continuous Fractional Component Monte Carlo (CFCMC) and molecular dynamics (MD) simulations are performed to calculate the solubilities and self-diffusion coefficients of four light n-alkanes (methane, ethane, propane, and n-butane) in aqueous NaCl solutions as well as the thermodynamic properties of their corresponding hydrate crystals. Correction factors k ij to the Lorentz–Berthelot combining rules for alkane groups (CH3) and water are optimized (k ij = 1.04) by fitting excess chemical potentials to experimental data at 1 bar and 298.15 K. Using these values of k ij , we calculate the solubilities of the four alkanes in aqueous NaCl solutions with different molalities (0–6) mol/kg at different temperatures (278.15–308.15) K and pressures (1, 100, 200, 300) bar. The diffusion coefficients of the four alkanes in NaCl solutions (0–6) mol/kg are calculated at different temperatures (278.15–308.15) K and 1 bar and corrected for the finite-size effects. The lattice parameters of the corresponding hydrates with different guest molecules are computed using MD simulations at different temperatures (150–290) K and pressures (5–700) MPa. Isothermal compressibilities at 287.15 K and thermal expansion coefficients at 14.5 MPa for the corresponding hydrates are calculated. We present an extensive collection of thermodynamic data related to gas hydrates that contribute to a fundamental understanding of natural gas hydrate science.

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Section: Introductionmentioning

confidence: 99%

Solubilities and Self-Diffusion Coefficients of Light n-Alkanes in NaCl Solutions at the Temperature Range (278.15–308.15) K and Pressure Range (1–300) bar and Thermodynamics Properties of Their Corresponding Hydrates at (150–290) K and (1–7000) bar

et al. 2023

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Transport of CO2: Presentation of New Thermophysical Property Measurements and Phase Diagrams

et al. 2017

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International audienceCO 2 transportation is an integral part of the CCS chain. After capture, CO 2 needs to be transported to locations whereby it is stored or alternatively used in various processes. CO 2 can be transported via ship or pipeline. In both cases, the required compression pressure can be 100–300 bar, depending on the distance and intended disposal or use of CO 2. The CO 2 rich stream can contain a lot of impurities which can modify the phase diagram and change the thermophysical properties of the stream in comparison with the ones of pure CO 2. Indeed, along with carbon dioxide, a great number of compounds such as water, O 2 , N 2 , Ar, SOx, NOx, H2 and CO can be present at different levels of concentration. During transportation by pipeline, if the pipe suffers a major fracture due to an accidental release or a failure, CO 2 can rapidly expand and cool: vapour cloud followed by solid formation of CO 2 may appear. The impurities could change the characteristics of the leak and change the conditions and compositions of CO 2 clouds and solid. The presence of water can also be a source of gas hydrate formation, ice or corrosion. In this communication we will present new experimental data and their modelling concerning the phase diagrams of systems rich in CO 2 and their thermophysical properties. Comparisons of the results obtained using different equations of state are also reported

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Thermophysical Properties, Hydrate and Phase Behaviour Modelling in Acid Gas‐Rich Systems

Cited by 2 publications

References 30 publications

Solubilities and Self-Diffusion Coefficients of Light n-Alkanes in NaCl Solutions at the Temperature Range (278.15–308.15) K and Pressure Range (1–300) bar and Thermodynamics Properties of Their Corresponding Hydrates at (150–290) K and (1–7000) bar

Solubilities and Self-Diffusion Coefficients of Light n-Alkanes in NaCl Solutions at the Temperature Range (278.15–308.15) K and Pressure Range (1–300) bar and Thermodynamics Properties of Their Corresponding Hydrates at (150–290) K and (1–7000) bar

Transport of CO2: Presentation of New Thermophysical Property Measurements and Phase Diagrams

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