Energetical aspects of N2 and Ar adsorption: Specific adsorption, two-dimensional phase changes and adsorption in micropores

Abstract

This paper reports information obtained from experiments of high resolution adsorption microcalorimetry of N2 or Ar at 77 K, which illustrate a few ideas strongly supported by A.V. Kiselev. The interest of comparative adsorption of N2 and Ar (as complementary probes) is shown in the case of the following adsorbents : hydroxylated non-microporous oxides (amorphous or crystalline, giving rise to “specific” adsorption), graphite and boron nitride (whose homogeneity leads to detectable two-dimensional phase changes) and microporous carbons (giving rise to enhanced “non-specific” adsorbate-adsorbent interactions). © 1989, Walter de Gruyter. All rights reserved.