Abstract
This study investigated the effects of different calcium hydroxide (Ca(OH) 2) addition methods on the potential for hydrogen chloride (HCl) formation in a simulated densified refuse-derived fuel (RDF-5) with single metal combustion system. These experiments were conducted at 850 °C with the Ca(OH) 2 spiked in the RDF-5 production or injection in the flue gas treatment system. The results indicated that the potential for HCl formation was decreased significantly by Ca(OH) 2 spiked in the RDF-5 production or injection in the flue gas treatment system. However, the Ca(OH) 2 injection method in the flue gas for HCl emission reduction was better than other method. According to the relationship between the HCl emission and amount of Ca(OH) 2 injected or spiked, it is interesting to find that when the Ca(OH) 2 injected or spiked ranged from 0% to 5%, the potential for HCl formation in the single metal combustion system decreases significantly with increasing Ca(OH) 2 injected or spiked ratio. A corresponding increase in the amount of CaCl 2 partitioned to the fly ash was observed. However, with the ratio of Ca(OH) 2 higher than 5%, the amount of HCl formation showed that no further significant variation occurred with increasing Ca(OH) 2 spiked ratio.
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