Related by context. Frequent words. (Click for all words.) 75 flue gas 66 exhaust gases 66 syngas 61 hydrogen chloride 59 gases 57 carbon dioxide CO2 56 sulfur dioxide SO2 56 dioxide 55 supercritical 55 combustion 55 scrubber 55 carbon dioxide 55 degassing 54 nitrogen oxides NOx 54 baghouse 54 CO2 54 remove impurities 54 gasses 53 vapor 53 potassium hydroxide 53 water vapor 53 sulfur dioxide 53 molten salt 53 gasification 53 organic solvents 53 reactants 52 ammonia 52 pyrolysis 52 heat exchanger 52 refrigerant 52 methane 52 boilers 52 biomass gasification 52 noxious chemicals 51 fly ash 51 harmful pollutants 51 effluents 51 anaerobic digesters 51 electrolytic 51 denitrification 50 heat exchangers 50 furans 50 gaseous hydrogen 50 hydrolysis 50 hexane 50 H2S 50 aqueous solution 50 FGD 50 adsorption 50 combustor 50 amine 50 dissolved solids 50 nitrogen oxide NOx 50 flammable gases 50 gases emitted 50 NOx 49 nitrous oxides 49 argon 49 furnaces 49 coke oven 49 silane 49 SO2 49 microturbine 49 particulates 49 coal gasification 49 chlorine dioxide 49 particulate matter emissions 49 livestock manure 49 condensers 49 condenser 49 solvents 49 carbons 49 impurities 49 Sulfur dioxide 49 biogas 49 effluent 49 cyanidation 49 cogeneration 48 fluorine 48 gasifier 48 steam generator 48 gas recirculation 48 steam turbine generator 48 evaporative 48 ethylene oxide 48 alkali 48 sulfur 48 solids 48 vapors 48 sulfuric acid 48 combustion turbine 48 HEPA filters 48 glycol 48 isobutanol 48 pollutants 48 particulate filter 48 particulate emissions 48 electrolyzer 48 steam boilers 48 TiO 2 47 N2O