Absorption of HCl by limestone in hot flue gases. Part I: the effects of temperature, gas atmosphere and absorbent quality

Absorption behavior of chlorine and sulfur by Ca(OH)2 under simulated conditions with a fluidized bed combustor

“…The removal efficiencies of chlorine and sulfur were 56 and 50% at a mole ratio of 1.0, respectively. These results were similar to the Ca conversion rate reported by Matsukata et al [2], Partanen et al [7] and Shemwell et al [8].…”

HCl absorption by CaO/Ca 3 Al 2 O 6 sorbent from CO 2 capture cycles using calcium looping

“…Many studies on HCl absorption by calcium-based sorbents have been implemented on the basis of the assumption that the reaction product was CaCl 2 [34,[39][40][41]. However, the product of the reaction between CaO and HCl was reported to be CaClOH [36,[42][43][44].…”

“…However, the chlorine contents in these fuels are much higher than those in the common coals [30,31]. Consequently, the flue gases of biomass-fired and RDFs-fired boilers often contain hydrogen chloride (HCl) with the concentration of 200-1500 ppm [31][32][33][34], which cannot meet the emission limit without the addition of sorbents. HCl is a poisonous air pollutant and might turn into some corrosive compounds.…”

Halide aerosols in circulating fluidised bed co-combustion. Role of coal bound kaolin

“…It has been reported in numerous publications, as referred to in Section 1, that HCl is liberated in the chemical reaction between kaolin and alkali metal halide vapour. The acidic HCl or HBr present in the flue gases may react with the high calcium ash [86][87][88][89]. The (Cl + Br)/(2Ca) molar ratio for the water soluble fraction of 0.28 and 0.12 for SRF-Bark + Kaolin and SRF-Bark + Coal, respectively, indicates that there is enough Ca to bind all the halogens.…”