000			01806nab a2200193 4500
005			20260520000842.0
008			260224s2009 xxu
245	0	0	_aReburn chemistry in oxy-fuel combustion of methane
260			_a _b _cjul./ago. 2009
270			_a15/06/2010 ; 14/06/2010
300			_a8 p. ; 3565-3572
520			_aTranscripción del resumen del autor. This work deals with the reburn chemistry in oxy-fuel combustion of methane. It was studied experimentally in an atmospheric-pressure flow reactor under diluted conditions in N2 and CO2, respectively. The experiments covered temperatures from 1173 to 1773 K and stoichiometries ranging from fuel-rich to fuel-lean. The results showed similar NO reduction efficiencies in N2 and CO2 under reducing conditions, while under stoichiometric and fuel-lean conditions, the NO reduction obtained in CO2 was higher than that obtained in N2. The temperature at which CO exhibited its maximum concentration coincided with a sharp increase in NO reduction. This temperature was higher in the experiments with CO2 compared to those in N2. The results were interpreted in terms of an updated detailed chemical kinetic model. The effect of CO2 is to increase the OH/H ratio, lower the overall concentration of the O/H radical pool, and increase the availability of CO. Under reducing conditions, the different ways that CO2 interacts with the nitrogen chemistry largely cancel out and the overall impact is small. Under stoichiometric conditions, the NO reduction is enhanced in CO2 because of the suppression of the O/H radical pool, in particular of atomic oxygen.
581			_a4
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aMendiara, Teresa _942647
100	1		_aGlarborg, Peter _942345
999			_c171011 _d171011