Calcium Hydroxide and Calcium Carbonate Particle Size Effects on Reactivity with Sulfur Dioxide

摘要

The paper reports results of measurements of the effect of in situ calcium-based sorbent particle size upon reactivity with 3000 ppm SO2 in an 1100 c drop-tube furnace, using on-line collection of the reacted sorbent with a particle cascade impactor. Significant agglomeration occurred for Ca(OH)2, while little was apparent for CaCO3. Reactivity of all sorbent particles increases as the measured particle diameter decreases, such that conversion is inversely related to diameter to the 0.22 to 0.32 power. For these sorbents, Ca(OH)2 particles had greater reactivity than the similarly sized CaCO3 sorbent.