| Abstract: | The chromatographic retention of H and D atoms has been observed in a quartz tube using argon as a carrier gas for D and six different gases for H. The results give equilibrium constants for the reversible adsorption of H and D on quartz as well as the rates of desorption. Self-consistent conclusions can be drawn from the data. The adsorption energy appears to be ca. 50 kJ mol?1 indicating weak chemisorption. The observations are consistent with vibration frequencies on the surface of around 700–900 cm?1 for D. and around 1000–1300 cm?1 for H. It appears that only a fraction of the surface atoms (ca. 10?2) act as adsorption sites. |
