Temperature dependences of methane elution on a Cu3(BTC)2 metal-organic framework

Methane elution from a helium flow was studied on a metal-organic framework Cu3(BTC)2 with gas chromatography under temperatures from 20 to 60°C. Specific retention volumes were calculated, and heat of adsorption was determined. The obtained values are characteristic for the microporous adsorbents having relatively large micropores and a low total volume of the micropores. The calculated efficiencies of an adsorbent layer alter slightly and their absolute values are significantly smaller than those of the activated carbons. Efficient kinetic constant has a parabolic dependence on temperature with a minimum at 40°C. Correctness of the developed algorithms to calculate elution constants on adsorbent layers of small length has been confirmed.