Adsorption Characteristics of Sulfur Dioxide on Pellet Type Zeolites

The experimental of SO2 adsorption, with varying SO 2 concentration, packed-bed depth, and space velocity, was car- ried out using a lab-scale fixed bed with zeolites, such as KA, NaA, CaA and NaX. Both of an equilibrium adsorption capacity an d a breakthrough time increased with zeolite pore size, in order of KA, NaA, CaA and NaX. Breakthrough time of NaX increased under SO 2 concentration of 504 ppm, but mass transfer rate decreased due to expansion of mass transfer zone. Breakthrough time is rela- tively increased in the low gas concentration( 504 ppm), which is proved by the effects o f equilibrium adsorption capacity, space velocity and 1/C 0 for the zeolite from the relationship of Wheeler equation.