Related by context. Frequent words. (Click for all words.) 72 scrubber 55 selective catalytic reduction 54 flue gas 53 sulfur dioxide emissions 52 coal fired 49 sulfur dioxide 47 nitrogen oxide 46 FGD 45 NOx 45 SO2 44 filtration 44 integrated gasification 44 digesters 44 boilers 44 cooling towers 44 nitrogen oxide emissions 44 dryers 44 nitrogen oxides 44 coal gasification 44 Generating Station 43 fly ash 43 kilns 43 furnaces 43 particulate emissions 42 incinerators 41 NOx emissions 41 coal 41 reverse osmosis 41 incinerator 41 scrubbing 41 boiler 41 Cinergy 40 pollutants 40 steam cleaners 40 mercury emissions 40 dehumidifier 40 pulverized coal 40 carbon capture 40 ammonia 40 digester 39 cement kilns 39 particulates 39 Calgon Carbon 39 coal gasification plant 39 degreaser 39 IGCC 39 volatile organic compounds 38 repowering 38 plants 38 petroleum coke 38 smokestacks 38 pollution 38 combustion 38 wastewater treatment 38 coker 38 leachate 38 sewage treatment 37 cleaning 37 cogeneration plant 37 Treatment Plant 37 perc 37 dryer 37 landfill 37 solvents 37 emission 37 Power Plant 37 compactors 37 powder coating 37 cogeneration 37 pollutant 37 particulate 37 steam turbines 37 steam generators 37 harmful pollutants 37 smokestack 37 Cliffside 37 landfills 37 gasification 37 particulate pollution 37 sulfur coal 37 compressor 37 extractors 37 turbines 37 emissions 37 AEP 36 furnace 36 electric arc furnace 36 toxic pollutants 36 TVA 36 steam turbine 36 autoclave 36 ventilators 36 air toxics 36 CONSOL 36 diesels 36 purifiers 36 hydrocracker 36 emission reduction 36 phosphates 36 sealant 36 burning fireplaces