Characterization of Carbon Molecular Sieve Carbons

The accessibility of nitrogen into these pores at the low temperature of adsorption (77 K) is hindered because of the activated diffusion effects. Thus, CO2, which is adsorbed at a much higher temperature (273 K), can have access to a larger proportion of the pores in these charcoals. This was further supported by the results of surface 

FIGURE 4.3 Adsorption isotherm of nitrogen on different polymer charcoals at 77 K. (After Bansal, R.C. and Dhami, T.L., Indian J. Chem., 19A, 1146, 1980. With permission.) 

Surface Areas of Polymer Charcoals by Adsorption Of Nitrogen and Carbon Dioxide 

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