2.3 Kinetic and equilibrium adsorption measurement
Kinetic adsorption profiles were measured on an Intelligent Gravimetric Analyzer (IGA001, Hiden, UK). N2 and CH4single-component gas adsorption isotherms were measured on a Micromeritics APSP 2460 analyzer. The nitrogen and carbon dioxide adsorption and desorption isotherms of the samples were obtained at 77 and 195 K on a Micromeritics APSP 2020 analyzer. The samples were activated at 423 K and 1 × 10–5 mbar for 12 h prior to testing. All gases used were of 99.99% purity.