Abstract
To further reduce the NOx emission from power plants, an experimental study on the NO reduction during advanced reburning with reburning fuel of raw coal and coals loaded with four kinds of main metals in coal ash (Na, K, Fe, Ca) was performed in a two-staged drop flow reactor (TSDFR). The results show that the metals in coal ash can affect the NO reduction during advanced reburning to different degrees, depending on the original fraction of oxygen (OFO, the volumetric concentration of oxygen in the flue gas which is entering into the reburning zone). When the OFO is between 2.75 and 5.36%, NaOH and KOH have a significant catalytic effect on NO reduction, producing an obvious increase in NO reduction efficiency, whereas the catalysis of FeCl3 and Ca(OH)2 is weak. By comparing the conversion of five main products during the reactions when using raw coal and coals loaded with different metals as reburning fuel, it is found that some types of metals can improve the NO reduction in reburning via increasing the concentration of CH4 and CO during the reactions. For advanced reburning, NO reduction can be enhanced via restricting the reaction of NH3−oxygen and promoting the homogeneous reduction of NH3−NO.
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.
