期刊
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
卷 15, 期 1, 页码 43-51出版社
SPRINGER
DOI: 10.1007/s10450-009-9149-x
关键词
Adsorption; Activated carbon; Dubinin-Astakhov; Supercritical; Hydrogen; Nitrogen; Methane; Modeling
资金
- Natural Resources Canada, Le Fond quebecois de la recherche sur la nature et les technologies
- Natural Sciences and Engineering Research Council of Canada
Simulations of the thermal effects during adsorption cycles are valuable tools for the design of efficient adsorption-based systems such as gas storage, gas separation and adsorption-based heat pumps. An analytical representation of the measured adsorption data over the wide operating pressure and temperature swing of the system is necessary for the calculation of complete mass and energy conservation equations. In Part 1, the Dubinin-Astakhov (D-A) model is adapted to model hydrogen, nitrogen, and methane adsorption isotherms on activated carbon at high pressures and supercritical temperatures assuming a constant microporous adsorption volume. The five parameter D-A type adsorption model is shown to fit the experimental data for hydrogen (30 to 293 K, up to 6 MPa), nitrogen (93 to 298 K, up to 6 MPa), and for methane (243 to 333 K, up to 9 MPa). The quality of the fit of the multiple experimental adsorption isotherms is excellent over the large temperature and pressure ranges involved. The model's parameters could be determined as well from only the 77 K and 298 K hydrogen isotherms without much reducing the quality of the fit.
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