Suppression of natural limestones deactivation during cyclic carbonation-decarbonation process in CCS technology
Abstract – The paper summarizes sorption properties of limestones with variable content of calcium carbonate. Changes of sorption capacities during cyclic calcinations and carbonations were investigated using laboratory apparatus with vertical quartz reactor. Application of suitably chosen limestones and process conditions offered sustainable capacity up to 11 kg CO2 /100 kg of initial limestone. Method of reactivation of the spent limestone using a gas saturated by water vapor was proposed to eliminate decreasing of the capacity in the carbonate looping process.
Keywords: carbon dioxide; limestone; carbonate looping; flue gas; sorption