Effect of particle size on thermal decomposition of lime shells: Suitability of calcined lime shell for pollution control and energy storage

摘要

Lime shells obtained from the lagoons of Kerala Coast have been decomposed with a view to study the effect of particle size. A modified TGA has been used to study the decomposition kinetics atvarious temperatures. Conversion time data obtained showed typical sigmoidal behaviour and the decomposition kinetics could be fitted to the Prout-Tompkins model at all temperatures and for all particle sizes studied. Arrhenius kinetic parameters showed normal type of compensation behaviour indicating an isokinetic temperature of 730 deg C. a theoretical explanation for these observed compensation behaviour indicating an isokinetic temperature of 730 deg C. a theoretical explanation for these observed compensation behaviour and isokinetic temperature has been given. Further, the calcined lime shell has been tested for the capture of CO_2 and SO_2 usign TGA. Effects of temperature of decomposition and particle size have been studied in this case. A theoretical, explanation based on pore size distribution of the calcined lime for this special behaviour has been given.