Abstract
Adsorption characteristics of activated coke and carbon adsorbents were investigated by using a flow-through type test equipment and a surrogate adsorbate of 1,2,3,4-tetrachlorobenzene (TCB) that may be a precursor of dioxins formation. Break through curves were measured in this equipment. Emphases were placed on the amounts of adsorption and the effects of temperature, moisture content of gas and the kind of adsorbents on the amounts. The adsorbed amounts in two activated coke samples were 1.7-5.8 mg-TCB/g, whereas 4.6-26 mg-TCB/g in an activated carbon. The amount in activated carbon was about 2-5 times of that of activated cokes, which might be reflecting the nature of cumulative micro-pore volume of the adsorbents. The adsorbed amount decreased with an increase in temperature, whereas it was not influenced by moisture content in flue gas.
