Sulfur dioxide is one the hazardous pollutants in oil and gas industries. Health, financial and environmental damages can be caused by release of this pollutant in the air. Therefore, in recent years, lots of environmental limitations have been determined by environmental communities to reduce the emission of this pollutant. Based on the above, the purpose of this study is adsorption and separation of sulfur dioxide by into two microporous pillared paddle wheel frameworks M(bdc)(ted) 0.5 [M = Cu, Co; bdc = 1,4-benzenedicarboxylate; ted = triethylenediamine]. These adsorbents are prepared by solvothermal method. Looking to BET analysis result, specific surface area for adsorbents are respectively 1216.23 and 629.57 m 2 /g. BJH analysis results show maximum pore size distribution around 1.21 and 1.65 nm. Considering to SEM images no agglomeration happened and size of particles for both of them is about 5 µm. XRD patterns show no another production due to heating operations and sorbent preparation. Moreover, same patterns yield for both sorbents. Adsorption tests are carried out at laboratory fixed bed reactor. Selected effective parameters are chosen for sulfur dioxide adsorption, temperature, pollutant inlet concentration and mass of adsorbent. By using design of expert and taguchi method, experimental conditions are chosen to save time and costs. Based on isotherms that gained from adsorption performance of each adsorbent fixed bed, adsorption capacity of pollutant is calculated by integration method and was used as result to analyze with calculating software. Among all parameters, temperature was the most effective one. Adsorbent Cu(bdc)(ted) 0.5 had the most adsorption capacity in the concentration range of 10000 to 30000 ppm and temperature range of 25 to 200°C. Adsorption capacity of these adsorbents are 239.58 mg/ (g sorbent) and 113.42 mg/ (g sorbent) respectively in 10000 ppm and 25 °C. Results of FT- IR show that mechanism of adsorption is physical adsorption. Therefore, with surface reformation, sorbent strength analysis and durability analysis, it is expectable that these sorbents can be used in pilot purposes. Keywords: Sulfur dioxide, Metal Organic Frameworks, Adsorption
