Related by context. Frequent words. (Click for all words.) 71 NOx emissions 68 nitrogen oxides NOx 67 Selective Catalytic Reduction SCR 67 NOx 66 nitrogen oxide NOx 64 particulate emissions 64 particulate matter emissions 63 nitrous oxides 62 nitrogen oxide emissions 60 NOx reduction 60 aftertreatment 60 selective catalytic reduction 59 sulfur dioxide SO2 59 pollutants emitted 59 diesel particulate filter 59 sulfur oxide 59 SO2 emissions 59 diesel particulate filters 59 particulate matter PM 59 pollutant emissions 59 gas recirculation 58 nitrogen oxide 58 particulate filters 57 sulfur dioxide nitrogen oxides 57 sulfur dioxide nitrogen oxide 57 combustion 57 flue gases 56 greenhouse gases GHG 56 gas recirculation EGR 56 nitrous oxide emissions 56 GHG emission 56 emmissions 56 emissions 55 emission 55 nitrogen oxides 55 conventional internal combustion 55 combustor 55 VOC emissions 54 spark ignition 54 particulate filter 54 syngas 54 biomass gasification 54 B# biodiesel [002] 54 NOX 54 biomass 54 diesel particulate matter 54 sulfur fuels 54 reciprocating engines 54 carbon dioxide emission 54 gasifiers 54 SF6 53 flue gas 53 Heat Exchanger 53 exhaust emission 53 CO2 emissions 53 diesel engines 53 desulphurisation 53 steam boilers 53 Carbon dioxide emissions 53 GHGs 53 Emissions 52 exhaust emissions 52 CO2 52 reduce carbon emissions 52 carbon dioxide emissions 52 SOx 52 combined cycle IGCC 52 variable valve 52 gasification 52 CO -2 52 Dual Fuel 52 H#O# 52 supercritical 52 gasifier 51 hydrocracking 51 gasified 51 AuraGen 51 SO2 51 BlueTec 51 combustion turbine 51 GHG reductions 51 microturbines 51 steam turbine generator 51 renewable feedstocks 51 circulating fluidized bed 51 gasify 51 gaseous fuels 51 emission reductions 51 cogeneration 51 microturbine 51 carbon dioxide CO2 51 BACT 50 isoprene 50 Thermoelectric 50 CO2 Emissions 50 anaerobic digesters 50 5kW 50 EfW 50 CO ² 50 Activated Carbon 50 Emission Control