NO forming rules in O2/CO2 atmosphere of pulverized coal and char with low oxygen concentrations
Abstract：Combustion experiments of Shanxi lignite were carried out on a horizontal furnace.The results show that the peak of NO falls and peak value shifts to an earlier time for coal in O2/CO2 atmosphere at O2 of 15% while the NO evolution rules are less affected by the variation of atmosphere.The cumulative emission of NO increases with increasing O2 concentration and then decreases,while in O2/N2 atmosphere,the cumulative emission of NO increases gradually.The O2/CO2 atmosphere is more effective for inhibiting the evolution of NO of pulverized coal and the inhibition effect of NO formation of char is gradually enhanced with the O2 concentration increased.With increasing concentration of O2,the contribution of char nitrogen for NO formation in O2/N2 atmosphere is increasing gradually.The addition of CO on NO formation effect is remarkable as the lowest NO formation with CO involved is reached when the concentration of CO is 1.5%,with the cumulative emission of NO drops by 14.1%.
Keywords：O2/CO2 atmospherelow oxygen concentrationcharNOcombustion
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 501-505 )