Modeling Helium Adsorption in Activated Carbon
Model comparisons are presented along with new adsorption measurements and with previously reported data. The data has been taken within the range of temperatures between 77 K and 2 K and pressures between 0.1 Pa and 1 MPa. The region of measurements corresponds to an adsorption ranging from 10-5gHe/gC up to 0.2 gHe/gC. The models are based on the Langmuir and BET equations. The parameters needed in order to attain agreement between the models and the data are presented. The models have been applied in order to enable interpolation and extrapolation of the experimental data. Under experimentally unverified conditions near 1 Pa at 77 K, the models predict adsorption values as low as 10-8 gHe/gC.
KeywordsHelium Alan Buckminsterfullerene
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