VOCs(volatile organic compounds) have been known as the source of pollution materials of the atmosphere. VOCs related to removal technologies such as emission, adsorption, absorption and condensation are developed. Recently developing VOCs removal technologies are bio filtration, membrane separation, UV. oxidation. Not available VOCs removal technologies are corona destruction, plasma technologies. Among the feasible removal technologies for VOCs, adsorption has been widely recognized as an effective means of controlling emissions to the atmosphere and recovering recycle materials from process exhaust streams. Experimental study was carried out for beneze adsorption in an activated carbon bed. As benzene concentration increased, breakthrough time was decreased. This results due to the pressure increasing in the bed and the higher interstitial linear gas velocity. In this experiment, mass transfer coefficient was measured by numerical simulation and curve fitting for experimental data. This dynamic adsorption data and mass transfer coefficient will be used for design of adsorption process.