Experiment on NO formation characteristics of char in O2/CO2 atmosphere
Abstract：In order to reveal NO formation characteristics and the effect of CO2 concentrated and CO on NO heterogeneous reduction with char during the process of O2/CO2 combustion,the combustion experiments for Shanxi lignite were carried out on a horizontal furnace.The results show that,compared with O2/N2 atmosphere,NO emissions from coal-nitrogen can be effectively suppressed in O2/CO2 combustion conditions.O2/CO2 atmosphere can inhibit converting volatile-nitrogen to NO remarkably,while the conversion of char-nitrogen to NO is relatively less restrained.The conversion of char-nitrogen to NO is significantly promoted with O2 concentration increasing.Char-NO heterogeneous reduction reaction is obviously improved by a moderate amount of CO2 and the promoting effect can be cancelled out to a certain extent by excess of CO2.The effect of CO addition on NO reduction is remarkable.The highest NO reduction efficient is reached when CO concentration is 0.5%,however,continuing rising of CO concentration can weaken the effect of NO reduction.
Keywords：O2/CO2 combustioncharNOformation characteristics
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：6( 1743-1748 )