Numerical modeling of heat and mass transfer in an adsorbed natural gas storage tank with monolithic active carbon during charging and discharging processes

Adsorbed natural gas (ANG) is a promising solution for improving the safety and storage capacity of low-pressure gas storage systems. The structural–energetic and adsorption properties of active carbon ACPK, synthesized from cheap peat raw materials, are presented. Calculations of the methane–ethane mixture adsorption on ACPK were performed using the experimental adsorption isotherms of pure components. It is shown that the accumulation of ethane can significantly increase the energy capacity of the ANG storage. Numerical molecular modeling of the methane–ethane mixture adsorption in slit-like model micropores has been carried out. The molecular effects associated with the displacement of ethane by methane molecules and the formation of a molecule layered structure are shown. The integral molecular adsorption isotherm of the mixture according to the molecular modeling adequately corresponds to the ideal adsorbed solution theory (IAST). The cyclic processes of gas charging and discharging from the ANG storage based on the ACPK are simulated in three modes: adiabatic, isothermal, and thermocontrolled. The adiabatic mode leads to a loss of 27–33% of energy capacity at 3.5 MPa compared to the isothermal mode, which has a 9.4–19.5% lower energy capacity compared to the thermocontrolled mode, with more efficient desorption of both methane and ethane.

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Numerical modeling of heat and mass transfer in an adsorbed natural gas storage tank with monolithic active carbon during charging and discharging processes

Cited by 3 publications

References 37 publications

Performance Analysis of a Helical Reactor Configuration for Adsorbed Natural Gas Storage

Performance Analysis of a Helical Reactor Configuration for Adsorbed Natural Gas Storage

Mathematical Modeling of the Cooling Process of Adsorbents with Different Channel Geometry at Low-Temperature Circulating Charging with Methane

Natural Gas Storage Filled with Peat-Derived Carbon Adsorbent: Influence of Nonisothermal Effects and Ethane Impurities on the Storage Cycle

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