Abstract
Flue gas cleaning in discharge plasma process has been studied intensively and we have tried to remove the NOx and SO2 using the wet-type plasma reactor. In this system, NO is oxidized to NO2 and absorbed as NO3-, and SO2 is absorbed as SO32- and oxidized in the liquid to SO42-. But the concentration of NO3- was saturated and the absorption of NOx and SO2 was inhibited. Then, the reduction of NO3- in the liquid is required. We examined the reductive reaction of NO3- to NH4+ using discharge above the liquid surface then the pH value of the liquid was changed to alkaline slightly. When the Fe plate was used as a ground electrode in the liquid, NH4+ was generated. Then, the relation between the generation of NH4+ and Fe ions (Fe2+ and Fe3+) was studied. When Fe2+ was presented in the liquid, NH4+ was generated and Fe2+ was oxidized to Fe3+. Fe2+ is required to generate NH4+ from NO3-. When NH4+ was generated from NO3-, both the calculated pH value from NH4+ concentration and the measured pH value indicated a similar value. From these results, the discharge above the liquid surface was effective to convert NO3- to NH4+ and the reductive reaction leads to more absorption of NO3-. These results showed that the wet-type plasma reactor is effective for NOx and SO2 removal system.
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.
