Author(s)

J.F. Izquierdo, F. Cunill, M. Iborra, J. Tejero & J. Costa

Abstract

Application of dry/wet systems to desulfurization of coal-fired utility stations flue gas J.F. Izquierdo, F. Cunill, M. Iborra, J. Tejero, J. Costa 72° ABSTRACT The tly ash reactivation in liquid phase without and with small amounts of calcium hydroxide has been studied. The explored variables were temperature, hydration time, water/fly ash weight ratio and fly ash/calcium hydroxide weight ratio. Some of the obtained solids showed a high surface area and large desulfurization power probably due to the formation of hydrated complex compounds like calcium aluminate and calcium aluminate sulfate. Five commercial calcium hydroxides were tested in a fixed-bed reactor to ascertain which have a greater power for sulfur dioxide removal. Small amounts of different inorganic additives (sodium hydroxide, sodium chloride and calcium clhoride) were added to the best commercial calcium hydroxide. Calcium chloride was the best additive at the experime

Keywords