Ottiger and co-workers investigated the
competitive adsorption of CO2 and CH4 on the activated carbons
prepared by dry coals and found that the activated carbons
possessed high CO2 adsorption capacity [12]. The main
factor affecting the adsorption capacities of CO2 and CH4 on
activated carbons is the textural properties of the activated
carbons. Meanwhile, the textural properties of the activated
carbons can be regulated by the preparation conditions and
the carbon precursors [13]. To our knowledge, there are few
reports on the application of activated carbons, prepared by
coconut-shells, to separate/concentrate greenhouse gases.