Studies on Evaluation and Utilization of Activated Carbon (Part 1)

Gas phase adsorption properties of activated carbon prepared from sulfonated asphalt were investigated by comparing with those of commercial activated carbon. As adsorbates sulfur dioxide, nitrous oxide, carbon dioxide, ammonia, ethylene, benzene, methanol, pyridine, acetic acid, carbon tetrachloride and water were used.It was found that gas phase adsorption capacity of activated carbon prepared from sulfonated asphalt was not less superior to that of commercial activated carbon, and as deoderizing agent and as adsorbent for hydrocarbon vapors liberated from automobiles, it could be used effectively.From the gas phase adsorption experiments carried out with the activated carbon prepared from sulfonated asphalt, the following trends were observed:1) Adsorption capacity for gaseous substances was small at room temperature and it varied with the pressure.2) Adsorption capacity for vapors of liquid substances was large at room temperature and its pressure dependence was small.