Transcription of Combustion Fundamentals
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2 CombustionFundamentalsTounderstandthefon nationofpollutantsincombustionsystems,we mustfirstunder-standthenatureofthefuelsb eingburned,thethennodynamicsofthecombust ionpro-cess, ,detonations, spectrumoffuelscurrentlyinwidespreaduse, thesimplestincompositionisnaturalgas,whi chconsistsprimarilyofmethanebutincludesa ,buttheyare,atleast, , ,whichconsistsofmeasurementsoftheelement alcompositionofthefuel,generallypresente dasmassfractionsofcarbon,hydrogen,sulfur ,oxygen,nitrogen,andash, "CH4C2H6C3 HshydrocarbonsCOH2H2SN2CO2(106Jm-3) "p,101kPa;T,25 "Sweetened,"H2S (106 Jkg-I)Kerosene( ) < < ,a measureoftheheatreleaseduringcompletecom bustion, ,physicalpropertiesthatinfluencethehandl inganduseofa ,thespecificgravityorAPIgravity,*viscosi ty(possiblyat severaltemperatures),flashpoint(ameasure ofthetemperatureatwhichthefuelissufficie ntlyvolatiletoignitereadily),anddistilla tionprofiles(fractionvaporizedasa functionoftemperature) ,coalsareclassifiedbyrank,a haveundergonerelativelylittlechange, , ,whichidentifiesthedegreeofcoalifactiono fa solidfuel( ).
Sec. 2.2 Combustion Stoichiometry 63 2.2 COMBUSTION STOICHIOMETRY Complete oxidation of simple hydrocarbon fuels forms carbon dioxide (C02 ) from all ... unit volume). The product mole fractions for complete combustion ofthis hydrocarbon fuel are n Yeo2 = 4.78(n + m14) + ml4 ml2 YN2 = 4.78(n + m14) + ml4 YH20 = 4.78(n + m14) + ml4
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