Study on Removal of Acetic Acid by Filter with Potassium Hydroxide-loaded Activated Carbon

In this work, we selected potassium hydroxide (KOH) as a chemical agent for acetic acid (CH3COOH) removal and loaded KOH on activated carbon. We considered the influence of KOH-loading on the specific surface area, the pore volume and the removal ability of CHsh3COOH in order to use KOH loaded activated carbon as air purifier filters. The KOH-loading of activated carbon proportionally increases with increasing the concentration of KOH aqueous solution, while the specific surface area and the pore volume show decreasing trends with the increase of KOH-loading. We find that KOH is easily loaded in the micropores smaller than 1nm and loaded on the surface region of activated carbon as well as in the larger pores with increasing KOH-loading. The deodorization performance of KOH loaded activated carbon as purifier filters was also evaluated using Tobacco. Activated carbon with the higher KOH-loading shows a shorter removal time of CH3COOH and has an ability of treating the larger number of tobacco, while the rate of increase of the number of tobacco which activated carbon can treat is small compared with that of KOH-loading increase.