A pure-component equilibrium adsorption isotherm of methane, ethane, p
ropane, and CO2 at different temperatures and the binary adsorption da
ta of methane with the other three species measured at 500 torr (66.7
kPa) and temperatures of 273 K and 303 K are presented and discussed T
hese measurements were carried out on three nutshell-derived KOH chemi
cally activated carbon (AC) samples and one commercial activated carbo
n. The binary adsorption data of another commercial AC (Nuxit-al) from
the literature are also used for comparison purposes. The single and
binary experimental data were applied to six models: IAST, loading-dep
endent isosteric heat, micropore-size distribution (MPSD), energy dist
ribution (ED), extended Langmuir, and extended Sips models. The models
were found to describe the experimental data of the commercial ACs wi
th a reasonably good accuracy but only the model assuming isosteric he
ar as a function of loading could reasonably predict the data of KOH c
hemically activated carbons.