Biomass　char　is　accepted　as　an　environmentally　friendly　energy　resource,　and　is　promising　for　NO　removal　in　industrial　furnaces.　NO　reduction　with　biomass　char　(rice　husk)　was　investigated　in　a　fixed-bed　quartz　reactor.　The　influence　of　CO　concentration,　reaction　temperature,　initial　NO　concentration,　and　char　loading　on　the　NO　reduction　were　evaluated.　The　results　showed　that　the　overall　NO　reduction　reaction　was　dominated　by　the　direct　reaction　of　NO　with　char　without　CO.　Increasing　CO　concentration　resulted　in　an　enhanced　catalytic　reaction　between　NO　and　CO　over　the　char　surface　and　a　decreased　carbon　consumption　of　char.　With　decreasing　temperature,　the　influence　of　CO　concentration　on　NO　reduction　was　strengthened.　Over　the　test　temperature　range,　char　provided　a　surface　to　catalyze　the　NO-CO　reaction　at　excess　CO/NO　ratio.　Increasing　the　initial　NO　concentration　led　to　an　increasingly　significant　influence　on　NO　reduction　with　the　enhanced　CO/NO　ratio.　With　increased　char　loading,　the　enhancement　of　NO　reduction　became　unobservable　for　excess　CO/NO　ratio.　Reaction　orders　of　NO　and　activation　energy　for　NO　reduction　by　char　were　0.71　and　60.21　kJ•mol-1,　respectively,　against　0.82　and　34.60　kJ•mol-1,　respectively,　for　NO　reduction　by　CO,　catalyzed　by　char.　©　2020　by　the　authors.