title: Removal kinetics for gaseous NO and SO2by an aqueous NaClO2solution mist in a wet electrostatic precipitator.
abstract: Removal kinetics for NO and SO2by NaClO2solution mist were investigated in a wet electrostatic precipitator. By varying the molar concentrations of NO, SO2, and NaClO2, the removal rates of NO and SO2confirmed to range from 34.8 to 72.9 mmol/m3s and 36.6 to 84.7 mmol/m3s, respectively, at a fixed gas residence time of 0.25 s. The rate coefficients of NO and SO2were calculated to be 0.679 (mmol/m3)-0.33s-1and 1.401 (mmol/m3)-0.1s-1based on the rates of the individual removal of NO and SO2. Simultaneous removal of NO and SO2investigated after the evaluation of removal rates for their individual treatment was performed. At a short gas residence time, SO2gas removed more quickly by a mist of NaClO2solution than NO gas in simultaneous removal experiments. This is because SO2gas, which has a relatively high solubility in solution, was absorbed more rapidly at the gas-liquid interface than NO gas. NO and SO2gases were absorbed as nitrite [Formula: see text] and sulfite [Formula: see text] ions, respectively, by the NaClO2solution mist at the gas-liquid interface. Then, [Formula: see text] and [Formula: see text] were oxidized to nitrate [Formula: see text] and sulfate [Formula: see text], respectively, by reactions with [Formula: see text], ClO2, HClO, and ClO in the liquid phase.
authors.affiliation: a Clean Combustion Research Center , King Abdullah University of Science and Technology , Thuwal , Makkah , Saudi Arabia.
authors.forename: Hyun-Woo
authors.initials: HW
authors.lastname: Park
authors.affiliation: b Department of Chemistry and Chemical Engineering , Inha University , Incheon , Republic of Korea.
authors.forename: Dong-Wha
authors.initials: DW
authors.lastname: Park
mesh_terms: D002712:Chlorides / Q000737:chemistry*; D007700:Kinetics; D009589:Nitrogen Oxides / Q000737:chemistry* / Q000302:isolation & purification; D055672:Static Electricity; D013458:Sulfur Dioxide / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D002712:Chlorides; D009589:Nitrogen Oxides; D013458:Sulfur Dioxide
keywords: NO; NaClO2; Removal rate; SO2; rate coefficient