In this study a novel sulfonation method for microporous polystyrene divinyl benzene copolymer (PSDBP) was introduced. In our sulfonation system gaseous SO 2 is used as the sulfonation agent and planned to be obtained from waste gas streams. The proposed method, therefore, combines SO 2 control and clean sulfonation technology in a single compact design.Molded polymeric monoliths of the PSDBP containing imprisoned H 2 O 2 solution inside the pores (PSDBPH2O2) were produced in disk shapes. Dry gas mixture containing 3000ppm SO 2 is fed into PSDBPH2O2 disk reactor with a flow rate of 0.8L/min and effluent gas composition in terms of SO 2 was measured. Breakthrough curves for varied initial H 2 O 2 amount were used to calculate SO 2 adsorption capacity and sulfonation degree of the PSDBPH2O2 disks.Successful sulfonation of PSDBPH2O2 was verified by the changes in its morphological structure and formed sulfone bonds determined by SEM and IR analyses, respectively. Maximum adsorption capacity for PSDBPH2O2 for the initial H 2 O 2 volume percentage of 13% was determined as 57mg SO 2 /g polymer. It should be noted that SO 2 adsorption was observed only in H 2 O 2 imprisoned polymer disks. Sulfonation degree of PSDBPH2O2 which attained maximum SO 2 amount is calculated as 10%.