Experimental study on simultaneous desulfurization and denitrification from flue gas with composite absorbent
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Abstract
Abstract The characteristics of desulfurization and denitrification with composite absorbent were researched through aqueous absorption experiments. The removal efficiencies of SO 2 and NO were up to 100 and 95%, respectively. The composite absorbent included NaClO 2 and component M. Existence of component M in the solution could reduce the absorbent cost compared with using sodium chlorite alone. Chlorine dioxide, as main reaction intermediate product, participated in oxidation reaction. The optimal experimental conditions involved NaClO 2 concentration of1.13 mmol/L, solution pH of 5.5, molar ratio (M/NaClO 2 ) of 4.1, reaction temperature of 323 K. The optimal solution pH and reaction temperature were both in the required ranges of limestone‐gypsum wet flue gas desulfurization (FGD) process. The research could offer primary data and important references for simultaneous removal of SO 2 and NOx in limestone‐gypsum wet FGD process. © 2010 American Institute of Chemical Engineers Environ Prog, 2011
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