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Removal of SO2 and NO from flue gas by wet scrubbing using an aqueous NaClO2 solution

2000; Elsevier BV; Volume: 80; Issue: 1-3 Linguagem: Inglês

10.1016/s0304-3894(00)00274-0

1873-3336

Tsung-Wen Chien, Hsin Chu,

Catalytic Processes in Materials Science

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.