The efficiency of KOH-added activated carbon in the removal of sulfur dioxide (SO_2) was examined by comparison with untreated activated carbon. KOH-added activated carbon was originally used to reduce atmospheric acid gases, but it was also found that its adsorption amount was less than that of untreated carbon in the examined concentration range. Furthermore, a prediction method for breakthrough curves using numerical simulations was studied. The simulated curves agreed well with the experimental results in both of the adsorbents. The predicted life of KOH-added activated carbon is longer than or equal to untreated activated carbon in conditions of atmospheric concentration.
