The　NO　heterogeneous　reduction　by　char　is　one　of　the　most　prominent　options　to　control　NOx　emissions　from　coal-fired　power　plants.　Experiments　on　the　char-NO　heterogeneous　reaction　were　carried　out　in　an　electrically　heated　fixed-bed　reactor　to　investigate　the　effect　of　temperature,　type　of　char,　pretreatment　method,　additives　and　reaction　atmosphere　on　the　NO　reduction　capacity　of　char.　The　results　showed　that　temperature　plays　a　crucial　role　in　the　NO　reduction　by　different　char.　The　kinetic　analysis　showed　that　char-NO　heterogeneous　reaction　is　controlled　by　chemical　kinetic　below　Tt　and　by　diffusion　kinetic　above　Tt.　The　value　of　transition　temperature　Tt　depends　on　the　types　of　char　and　ranges　from　600　°C　to　800　°C.　The　synergistic　effect　of　specific　surface　area,　mineral　abundance　and　reactivity　combine　to　result　in　the　reduction　efficiencies　of　different　char.　Oxygen　has　a　promoting　effect　on　the　char-NO　heterogeneous　reaction,　and　the　oxygen　content　of　the　promoting　peak　moves　to　low　oxygen　content　with　increasing　temperature.　At　1050　°C,　the　denitrification　efficiency　at　0.25%　O2　content　is　12.7%　higher　than　that　under　oxygen-free　conditions.　At　high　temperatures,　the　promotion　of　the　char-NO　heterogeneous　reaction　by　CO　and　the　inhibition　of　the　reaction　by　CH4　were　more　obvious.　©　2022　Society　of　Thermal　Engineers　of　Serbia.