Experimental Examination of Sulfur Dioxide Dry Removal from a Mixture of Gases by Calcium Oxide, Calcium Carbonate and Dolomite

This paper refers to an experiment of SO۲ absorption to the three different sorbents: calcium-oxide (CaO), calcium-carbonate (CaCO۳) and dolomite (CaMg(CO۳)۲). In the reactor under the condition of oxidation atmosphere with the mass of sorbent (sample) of ۱۰۰ g with fractional composition of ۵۰۰-۷۰۰µm, the gas temperature varied from ۲۰۰°C and ۴۰۰°C. The examinations indicated that the highest degree of sorbent utilization of ۱۴ % was determined for dolomite (CaMg(CO۳)۲) and the binding degree of SO۲  from ۶۵-۸۰% and the lowest for calcium oxide  of ۴% and the binding degree of SO۲  from ۳۴-۶۰% at the reaction temperature of ۲۰۰°C. When the reaction temperature is ۴۰۰°C the degree of sorbent utilization is a bit lower. The achieved results indicate the injection capability of powdered sorbents CaMg(CO۳)۲, CaCO۳ and CaO in the areas of lower temperatures as it is the convective part of the boiler or furnace flue of the thermo power plant.