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High Resolution Image Download MS PowerPoint Slide Textural characterization of porous solids is commonly carried out by N 2 adsorption at 77 K. Additionally, CO 2 adsorption at 273 K and sub-atmospheric pressure was proposed as a complement to N 2 for the more complete characterization of the narrow microporosity. However, and contrary to the general assumption, CO 2 adsorption may be kinetically restricted in narrow pores (<0.3−0.4 nm), in spite of the high-temperature (273 K) at which the measurement is carried out, thus giving rise to an erroneous characterization.
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Rios et al. (2007) studied this question.
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