Influential parameters on the dissolution rate of limestone samples of tirunelveli district, Tamil Nadu, India

Calcium carbonate (CaCO₃) is an abundant mineral comprising approximately 4% of the earth's crust. The CaCO₃ has received much attention owing to its wide application in such industrial fields as paper, rubber, plastics, paint, etc. Flue gas desulphurization (FGD) employs limestone suspension to absorb SO₂. The rate of CaCO₃ dissolution in slurry scrubbers for FGD affects SO₂ absorption, CaSO₃/CaSO₄ scaling, and ultimate CaCO₃ utilization. Increasing the limestone dissolution rate for limestone-containing slurries used in wet Flue gas desulphurization (WFGD) systems allows courser limestone particles, lower limestone stoichiometry and lower slurry recycle rates to be employed, thereby saving capital and operating costs The influence of P^H value, temperature, variation in particle size, rotation speed on limestone dissolution rate is investigated in this study. This study focuses on the suitability of certain limestone samples from the Tirunelveli district of Tamil Nadu, India and is based on the most influential parameters on the reactivity of marginal grade limestone samples in slurry scrubbers for FGD.