Removal of SO2 and NO from flue gas by wet scrubbing using an aqueous NaClO2 solution.
This study used a NaClO2/NaOH solution as the additive/absorbent to determine the extent of NOx removal in a wet scrubbing system. A combined SOx/NOx removal system was also tested. The experiments were performed in a bench-scale spraying sieve tray wet scrubber in a continuous mode. The operating variables included NO and SO2 concentrations, L/G ratio, molar ratio, and initial pH. The results of the individual DeNOx experiments show that the maximum DeNOx efficiencies ranged from 3.1 to 12.6%. The results of the combined DeSOx/DeNOx experiments show that the maximum DeNOx and DeSOx efficiencies ranged from 36.6 to 71.9% and from 89.4 to 100.0%, respectively. The major parameters affecting NOx removal efficiencies are the L/G ratio and the dosage of additive. The major parameter influencing DeSOx efficiencies is the L/G ratio.
Chien
T W
TW
Department of Environmental Engineering, National Cheng Kung University, Tainan, Taiwan, ROC.
Chu
H
H
D000042:Absorption; D000393:Air Pollutants / Q000032:analysis; D000397:Air Pollution / Q000032:analysis / Q000517:prevention & control*; D002712:Chlorides / Q000737:chemistry*; D005740:Gases; D009569:Nitric Oxide / Q000737:chemistry*; D013458:Sulfur Dioxide / Q000737:chemistry*; D018505:Waste Management / Q000379:methods*
D000393:Air Pollutants; D002712:Chlorides; D005740:Gases; D013458:Sulfur Dioxide; D009569:Nitric Oxide; C001599:chlorite