A pelletized absorbent was developed in order to separation the CO2 generated during methane steam reforming reaction. The best adsorbent manufactured using the organic and inorganic binder showed the best plasticity when CaCO3 feldspar and bentonite are mixed at the rate of 90:5:5% with the hardness of 95%. The CO2 breakthrough test on the adsorbent using the fixed bed reactor found that the amount of adsorption was very high at the reaction temperature of 750>700>800℃ in the descending order.