Related by context. Frequent words. (Click for all words.) 54 steam boilers 54 steam boiler 54 pulverized coal 53 furnaces 53 boilers 50 combustion turbines 48 fireplace inserts 48 desulphurisation 48 combustion turbine 48 gasifiers 48 circulating fluidized bed 47 superheated steam 47 furnace 46 flue gases 45 combustion 45 coal 45 arc furnaces 45 Acetylene 45 coke ovens 44 Enriched uranium 44 Catalytic converters 44 steam generator 44 coke oven 44 supercritical 44 combustible gases 43 gasified 43 petroleum coke 43 reciprocating engines 43 boiler 43 Integrated Gasification Combined Cycle 43 Heat Exchanger 43 biomass boilers 43 hydrogen fluoride 43 oxidizers 43 igniters 43 gasifier 42 chemical solvents 42 desulfurization 42 acetylene torch 42 hydronic 42 condensers 42 heat exchangers 42 incomplete combustion 42 kiln 41 sulfur oxide 41 purifying uranium 41 ductwork 41 Furnaces 41 naptha 41 briquette 41 Propane tanks 41 ionizing 41 steam turbines 41 pizza ovens 41 ovens 41 Nitrogen oxides 41 gaseous fuels 41 selective catalytic reduction 41 steam turbine 41 respiratory irritant 41 elemental sulfur 41 syngas 41 evaporators 41 wood burning stoves 41 hydrogen chloride 41 die castings 41 wood stoves 41 cogeneration 40 Selective Catalytic Reduction SCR 40 anodes 40 petcoke 40 steam turbine generator 40 graphite electrodes 40 radiators 40 gas recirculation 40 transformer 40 coal fired 40 Sulfur dioxide 40 thermoelectric plants 40 Highly enriched uranium 40 brick oven 40 phosphine 40 blast furnaces 40 cement kilns 40 electric arc furnace 40 Longannet 40 dioxide 40 preheating 40 biomass fuels 40 microturbines 40 air conditioning compressors 40 cement kiln 40 spark ignition 39 scrubber 39 hobs 39 isocyanate 39 fuel injector 39 florescent light 39 rice husk 39 plate heat exchangers 39 kilns