Many　studies　have　indicated　that　carbon　can　be　reduced　to　nitric　oxide.　This　paper　reports　an　experimental　study　of　NO　reduction　by　mixed　materials　of　biochar　or　active　carbon　with　cement　raw　meal.　The　proportion　of　mixed　materials　was　95　wt.%　cement　raw　meal　and　5　wt.%　biochar　or　active　carbon.　A　mixture　loading　amount　and　gas　flow　rate　study　quantifying　the　effect　of　carbon　amount　and　gas　residence　on　the　reduction　of　nitric　oxide　was　carried　out.　The　experiment　was　performed　in　a　fixed　bed　reactor　at　the　temperature　of　800°C,　with　O2　concentration　of　1%.　The　inlet　NO　concentration　was　1000　ppm.　The　characterization　of　structure　and　properties　of　biochar　and　active　carbon　was　conducted　by　SEM-EDS,　BET.　The　results　show　that　different　carbon　materials　have　different　NO　reduction　effect.　The　NO　conversion　rate　increases　with　the　increase　of　the　amount　of　mixture　loading.　This　method　of　removing　NO　is　practically　feasible.　©　2017　Trans　Tech　Publications,　Switzerland.