Surface Heterogeneity Analysis of MWCNT from Methane Adsorption Isotherms for Adsorbed Natural Gas Storage

摘要

Adsorption equilibria of methane on multi-walled carbon nanotube (MWCNT) were measured. For comparison of the adsorption properties, two zeolites (DAY and HSZ-320) were chosen. The isotherm data were obtained using a static volumetric method at 303.15K, 313.15K, 323.15K and at pressures up to 3MPa. Experimental data of zeolites and carbon nanotube were correlated by the Sips isotherm and the hybrid Langmuir-Sips equations, respectively. Isosteric enthalpies of adsorption were calculated as a function of surface loading.