EXPERIMENTAL EXAMINATION OF SULPHUR DIOXIDE SEPARATION FROM MIXTURE OF GAS IN DRY PROCEDURE WITH THE AID OF CALCIUM CARBONATE

This paper refers to an experiment of SO2 absorption to the particles of sorbent CaCO3, the mass of sample was 100 g with fractional composition of 500-700µm and 1100-1300μm. During the experiment the temperature varied from 200 and 400°C. The aim of this experiment described in this paper, is to examine the influence of lower reaction temperature, the size of sorbent particles and reaction time to the degree of SO2 absorption and determining the degree of CaCO3 sorbent utilization. The results show that at the reaction temperature of approximately 200°C and average diameter of sorbent particles ≈600μm, the absorption degree of SO2 absorption to the particles of sorbent is between 42-66%.Reaching temperature of 400°C and with the same fractional composition of the sorbent, ≈600μm, the absorption degree of SO2 is slightly higher and it is somewhere around 45-78%. With greater diameters sorbent particle of ≈1200μm, absorption degree of SO2 is a bit lower.The determined degree of utilized sorbent CaCO3 is considerably lower and it reaches up to 6.87%.The acquired results indicate that besides CaO,Ca(OH)2 and CaMg(CO3)2 it is reasonable to inject the CaCO3 sorbent, in the areas of lower temperatures i.e. in the flue channel of the thermal power plant