Postflame behavior of nitrogenous species in the presence of fuel sulfur I. Rich, moist, CO/Ar/O2 flames

Wendt, Jost O.L.; Wootan, E.C.; Corley, Timothy L.

doi:10.1016/0010-2180(83)90169-4

Cited by 43 publications

(26 citation statements)

References 12 publications

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“…SO x may also affect the formation of NO x from fuel-bound nitrogen. The interactions via the radical pool as well as direct interactions between sulfur and nitrogen species appear to explain the effects of SO x on NO x [12,13]. The combustion kinetics of sulfur compounds and potential interactions with fuel oxidation processes have been established based on previous studies and QRRK calculations [2,14].…”

Section: Introductionmentioning

confidence: 99%

Interactions of CO, HCl, and SOx in pulverised coal flames

Wei

Schnell

Han

et al. 2004

Fuel

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The effect of HCl and SO 2 on CO oxidation in pulverised coal flames was investigated experimentally and kinetically in an entrained flow combustion reactor. Two bituminous coals (German 'Goettelborn' and a Polish coal) were used as fuels with a feeding rate of 1 or 1.5 kg/h. HCl or SO 2 is introduced into the reactor premixed with the primary air. Experimental results indicate that HCl addition may inhibit CO oxidation in coal flames and increases CO emission. Reducing temperature in the reactor will enhance the inhibitory effect of HCl on CO oxidation. The measured CO profiles along the reactor height clearly show that the addition of HCl may inhibit CO oxidation. In the experimental range of SO 2 addition, the inhibiting effect of SO 2 on CO oxidation is less significant than HCl. A detailed kinetic mechanism is used to model the reactions, and the controlling reactions are analysed. q

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Section: Introductionmentioning

confidence: 99%

Interactions of CO, HCl, and SOx in pulverised coal flames

Wei

Schnell

Han

et al. 2004

Fuel

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“…The presence of sulfur compounds may also affect the formation of nitric oxide from fuel-bound nitrogen . This interaction can primarily be attributed to the catalytic effect of the sulfur species on radical recombination [ lo], even though direct interaction between sulfur and nitrogen species may also occur [8].…”

Section: Introductionmentioning

confidence: 99%

Impact of SO2 and NO on CO oxidation under post-flame conditions

Glarborg

Kubel

Dam‐Johansen

et al. 1996

Int. J. Chem. Kinet.

141

128

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An experimental and theoretical study on the effect of SO2 on moist CO oxidation with and without NO present has been carried out. The experiments were performed in an isothermal quartz flow reactor at atmospheric pressure in the temperature range 800–1300 K. Inlet concentrations of SO2 ranged from 0 to 1800 ppmv, while the NO ranged between 0, 100, or 1500 ppm. SO2 inhibits CO oxidation under the conditions investigated, shifting the fast oxidation regime 20–40 K towards higher temperatures at 1500 ppm SO2. The inhibition is most pronounced at high O atom levels. The experimental data supported by model analysis suggest that SO2 primarily reacts with O atoms forming SO3, which is subsequently consumed mainly by reaction with O and HO2. Addition of NO significantly diminishes the effect of SO2. Since NO is usually present in combustion flue gases, the impact of SO2 on CO burnout in most practical systems is projected to be small. The H/S/O thermochemistry and reaction subset has been revised based on recent experimental and theoretical results, and a chemical kinetic model has been established. The model provides a reasonable overall description of the effect of SO2 and NO on moist CO oxidation, while the SO3/SO2 ratio is well predicted over the range of conditions investigated. In order to enhance model performance further, rate constants for a number of SO2 and SO3 reactions need to be determined with higher accuracy. © 1996 John Wiley & Sons, Inc.

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“…Depending on the conditions, sulfur in flames has been found to enhance or suppress formation of nitrogen oxides [1][2][3][4][5][6][7][8]. The mechanism(s) are unknown.…”

Section: Introductionmentioning

confidence: 99%

A coupled-cluster study of the enthalpy of formation of nitrogen sulfide, NS

Peebles

Marshall

2002

Chemical Physics Letters

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The energy of NS was computed via CCSD(T) theory, together with extrapolation to the complete basis set limit and corrections for anharmonic zero-point energy, scalar and vector relativistic terms, and core-valence electron correlation. The results were employed with three working reactions to find D f H 0 ðNSÞ ¼ 277:3 AE 2 kJ mol À1 and D f H 298 ðNSÞ ¼ 278:0 AE 2 kJ mol À1 . This thermochemistry is consistent with, but much more precise than, earlier literature values.

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Postflame behavior of nitrogenous species in the presence of fuel sulfur I. Rich, moist, CO/Ar/O2 flames

Cited by 43 publications

References 12 publications

Interactions of CO, HCl, and SOx in pulverised coal flames

Interactions of CO, HCl, and SOx in pulverised coal flames

Impact of SO2 and NO on CO oxidation under post-flame conditions

A coupled-cluster study of the enthalpy of formation of nitrogen sulfide, NS

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