This paper studies the adsorption process behavior of SO2 removal in one fluidized bed reactor which is filled with aluminum oxide catalysts. The performance of catalytic bed is analyzed experimentally and theoretically in this work. Sulfur elimination from gas is the major purpose of the handled experiments. The influence of bed height, bed width, diameter of aluminum oxide particles which affects the mass transfer surface area, operating conditions such as temperature and pressure which affects the mass transfer coefficient and rate of reaction and also superficial velocity of inlet gas which affects the residence time are measured and discussed. Results show the increase in the percentage of SO2 removal with increasing sorbent aluminum content and bed height. The increase in the percentage of SO2 removal with increase of operating temperature (0.41%), pressure (0.21%), superficial velocity (0.5%), bed diameter (0.16%), bed height (0.58%), and surface area (0.63%) and with decrease of particle diameter (0.54%) are obtained. The applied mathematical model can predict the experimental data with an average accuracy of 92%. (C) 2015 Elsevier Ltd. All rights reserved.