Related by context. Frequent words. (Click for all words.) 64 combustor 62 gasifiers 61 combustion 61 reciprocating engines 60 spark ignition 60 fluidized bed 59 Pyrolysis 58 oxy fuel 58 gaseous fuels 58 oxidizers 57 ramjet 57 PEM fuel 57 Supercritical 57 Selective Catalytic Reduction SCR 57 SF6 56 stoichiometric 56 gasified 56 steam boilers 56 gasifier 56 nitrogen oxide NOx emissions 56 turbofan engine 56 steam boiler 56 internal combustion engines 55 aftertreatment 55 gaseous emissions 55 electrolyzer 55 evaporative emissions 55 fluorocarbons 55 fuel injector 55 porous silicon 55 thermal oxidizer 55 HFC #a 55 combustion chambers 55 hydraulic fluids 54 compression ignition 54 diesel particulate filter 54 sorbents 54 nitrogen oxide NOx 54 cell SOFC 54 isomerization 54 Coal gasification 54 microturbines 54 R#a 54 diaphragm pumps 54 Heat Exchanger 54 biocrude 54 particulate filters 54 degassing 54 circulating fluidized bed 54 feedwater 53 ASTM D# [002] 53 hydride 53 electrolyser 53 subcritical 53 thermally stable 53 thermochemical 53 combustion gases 53 oxidizer 53 diesel particulate filters 53 gaseous hydrogen 53 Piezoelectric 53 desulfurization 53 Nafion 53 thermoelectric materials 53 glow plugs 53 Bioreactor 53 thermo chemical 53 diesel engines 53 Biobutanol 53 syngas 53 solenoid valve 53 powerplants 53 gas recirculation 53 evaporators 53 combustion chamber 53 Propulsion System 53 pulsed laser 53 turbine engines 52 ethanol methanol 52 lubricating oils 52 SOFCs 52 scramjets 52 renewable feedstocks 52 ultrasonics 52 breeder reactors 52 airflows 52 J 2X engine 52 magnetron 52 Fischer Tropsch 52 hydrogen chloride 52 fuel 52 metal hydride 52 turbofan 52 alkanes 52 liquid propellant 52 algae biomass 52 vaporization 52 AuraGen 52 CFM# engines 52 supercritical 52 combustion engines