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

Abstract

<em>This paper refers to an experiment of SO₂absorption to the three different sorbents: calcium-oxide (CaO), calcium-carbonate (CaCO₃</em><em>) and dolomite (CaMg(CO₃</em><em>)₂</em><em>). In the reactor under the condition of oxidation atmosphere with the mass of sorbent (sample) of 100 g with fractional composition of 500-700µm, the gas temperature varied from 200°C and 400°C. The examinations indicated that the highest degree of sorbent utilization of 14 % was determined for dolomite (CaMg(CO₃</em><em>)₂</em><em>) and the binding degree of SO₂ from 65-80% and the lowest for calcium oxide of 4% and the binding degree of SO₂ from 34-60% at the reaction temperature of 200°C. When the reaction temperature is 400°C the degree of sorbent utilization is a bit lower. The achieved results indicate the injection capability of powdered sorbents CaMg(CO₃</em><em>)₂, CaCO₃ 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.</em>