Abstract
Removal of NO from flue gas may be achieved by its oxidation to NO2 followed by absorption in sulfite solution in existing scrubbers for desulfurization. Rates of NO2 absorption and sulfite oxidation were measured in a highly characterized stirred-cell contactor. The results were interpreted by the theory of mass transfer with fast reaction in the boundary layer. The reactions between NO2 and sulfite (SO32-), bisulfite (HSO3-), and thiosulfate (S2O32-) were first order in NO2 concentration, and their respective rate constants at 55 °C were 11.2 × 105, 2.8 × 104, and 5.4 × 103 M-1 s-1. The NO2 hydrolysis reaction was second order in NO2 concentration, with a rate constant of 1.6 × 107 M-1 s-1 at 55 °C. NO2 absorption initiates sulfite oxidation in the presence of oxygen, and this study quantified the effect of sulfite and oxygen concentration, the rate of NO2 absorption, and the presence of thiosulfate and gas-phase SO2 on the rate of sulfite oxidation. With typical conditions for limestone slurry, 10 mM t...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
