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Gas adsorption techniques constitute the most common approach for the characterization of the pore structure of porous materials, N2 adsorption at 77 K is the most used. It has been demonstrated that CO2 adsorption at 273 K, at sub‐atmospheric pressures, is necessary for the correct characterization of this narrow microporosity.
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Lozano‐Castelló et al. (2003) studied this question.
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