Hydrogen adsorption in cryogenic conditions: relationship between the porous texture and the parameters of the Modified Dubinin-Astakhov equation

Abstract : Among the wide variety of existing carbons materials, activated carbons (ACs) exhibit, on average, the highest hydrogen adsorption capacities (up to 7 wt. % at 4 MPa and 77 K) . Hydrogen adsorption on ACs is really advantageous at moderate pressures, lower than 40MPa. Thus, the use of ACs can reduce by 23% the volume needed for hydrogen storage when compared to pure compression at 20 MPa and room temperature. Hydrogen adsorption at supercritical conditions on ACs has been adequately fitted with the modified Dubinin-Astakhov (MDA) equation. However, the physical meaning of the MDA parameters is not completely understood whereas it is of primary importance for designing hydrogen storage systems.
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Submitted on : Wednesday, July 17, 2019 - 2:18:39 PM
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Vanessa Fierro, Pamela Ramirez-Vidal, Giuseppe Sdanghi, Sébastien Schaefer, Gaël Maranzana, et al.. Hydrogen adsorption in cryogenic conditions: relationship between the porous texture and the parameters of the Modified Dubinin-Astakhov equation. Carbon 2019, Jul 2019, Lexington, United States. ⟨hal-02186765⟩

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