Study of the modifying of activated carbon and its adsorption properties of CO_2/CH_4 mixture

Activated carbon was used as a basic adsorbent.Different kinds of activated carbon,diverse acid-base modifying were employed to find an activated carbon which had well adsorbed properties.The adsorption properties were evaluated by breakthrough curves which were measured by an dynamic adsorption equipment.The results show that the coal-based activated carbon is better than the other varieties of activated carbons;the activated carbons which are modified by aqua ammonia,hydrogen peroxide and hydrochloric acid have big adsorption capacities.The CO2/CH4 separation factors of aqua ammonia and hydrogen peroxide modified activated carbons are raised evidently.