Kinetic Study on Selective Sulfur Dioxide Reduction from Flue Gas: Higher selectivity and stability for SO_2 Reduction from Power Plants

The work includes an exhaustive study on the reduction of Sulfur dioxide gas via a novel selective amine based absorber in order to show the optimum process and reaction kinetics as well. Experimental studies were conducted in a pilot plant aiming to reduce SO_2 in a mixture of flue gas with the emphasis on the kinetics of the process and final released SO_2 emission by obtaining the optimal process condition. Sulfur dioxide was reduced from 4000-8000ppm to an amount of less than 10 ppm in the outlet of the pilot. During the scrubbing process, SO_2 absorption was performed in atmospheric pressure and a temperature between 52 to 73 degrees Celsius. Various flow rates were implemented to reach an effective performance of the pilot process. A highly efficient process was obtained based on experimental results in a long operational time in comparison with the commercial solvents. Finally, the reaction kinetics between SO_2 and Amine-based solution were measured over a range of temperatures from 40°C to 60 °C with the concentrations of SO_2 ranging between 2500 ppm 850 ppm and the results shows a first order reaction between the absorbent and SO_2 was determined.