| Autor: |
Bałys, Mieczysław, Brodawka, Ewelina, Jagiello, Jacek |
| Zdroj: |
Chemical Engineering Research and Design; July 2024, Vol. 207 Issue: 1 p320-330, 11p |
| Abstrakt: |
In this paper, we attempt to estimate CH4adsorption on carbon materials based on the pore size distribution (PSD) characteristics evaluated from standard nitrogen and carbon dioxide adsorption isotherms using the nonlocal density functional theory (2D-NLDFT), or more precisely, its two-dimensional version (2D-NLDFT). The PSDs of the carbons were calculated by the simultaneous fit of the NLDFT models to the corresponding N2and CO2adsorption data. This method is referred to in the literature as the dual gas analysis method which is implemented in SAIEUS software. Essential features of carbon PSDs affecting the shapes of methane adsorption isotherms measured at ambient temperature were identified as related to micro and mesopores carbon structure. We discuss how different micro and mesopore size ranges contribute to methane adsorption isotherms in the low and higher-pressure ranges. The results of the present study may serve as guidance for selecting and designing suitable carbon materials for practical applications such as PSA recovery of CH4from its mixtures or for methane storage. |
| Databáze: |
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