The interaction of SO2 and NO in rich combustion zones

Chagger, H.K.; Goddard, P.R.; Murdoch, Patricia; Williams, Alan

doi:10.1016/0016-2361(93)90422-x

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…NS + O A pathway to reduce the presence of NO under fuel-rich combustion conditions. [19,22] R2 S + NO 2 ! SO + NO One of the main reactions of sulfur mechanism, [15,16] the reverse reaction of SO + NO !…”

Section: Numbermentioning

confidence: 99%

“…NS + OH A possible reaction to reduce the presence of NO in the rich reburn zone when methane is the reburn reagent. [22] R6 SH + NO 2 ! HSO + NO One of the major reactions in the atmosphere at low temperatures, [29] also exist in combustion.…”

Section: R3mentioning

confidence: 99%

“…Pfefferle and Churchill [20] studied the effect of fuel sulfur on nitrogen oxide formation in the thermally stabilized plug-flow burner and found that temperature played an important role. Chagger [21,22] discussed possible interactions between NOx and SO 2 during reburning and summarized the relevant reaction mechanism. Hampartsoumian [23] did an experiment investigation of sulfur-nitrogen interactions in turbulent spray flames, and the experimental results showed that the increase in fuel-NO emission, at a particular operating condition, due to sulfur addition, was in most cases linearly dependent on the sulfur concentration in the fuel.…”

Section: Introductionmentioning

confidence: 99%

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Calculation of anharmonic effect on the reactions of small sulfur‐containing molecules with NO/NO₂ in combustion

Chen

Yang

et al. 2021

J Chinese Chemical Soc

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Section: Numbermentioning

confidence: 99%

Section: R3mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Calculation of anharmonic effect on the reactions of small sulfur‐containing molecules with NO/NO₂ in combustion

Chen

Yang

et al. 2021

J Chinese Chemical Soc

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“…SO 2 , in the presence of CaO, has also been reported to reduce NO x concentrations by around 7% (Wang et al 1995). In the absence of calcium oxide, SO 2 is thought to limit the destruction of NO x through the reburn reaction by altering the hydrocarbon-radical pool (Chagger et al 1993, Dagaut & Lecomte 2003.…”

Section: Multi-component So 2 -Hcl-no X Reductionmentioning

confidence: 99%

A novel additive for the reduction of acid gases and NOx in municipal waste incinerator flue gas

Hall

Williams

2006

Waste Manag Res

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The reduction of SO2, HCl, and NO(x) concentrations using calcium magnesium acetate (CMA) as a novel sorbent in a simulated municipal waste incinerator flue gas was investigated. The reduction of individual SO2, HCl, and NO(x) concentrations was tested at 850 degrees C and it was found that CMA could reduce the SO2 concentration by 74%, HCl concentration by 64%, or NO(x) concentration by 94%. It was observed that individual SO2 or HCl capture increased with increasing initial oxygen concentration in the reacting gas or increasing sorbent input. NO(x) reduction decreased with increasing initial oxygen concentration in the reacting gas. The simultaneous reduction of SO2, HCl, and NO(x) concentrations by CMA was also investigated. It was found that CMA could simultaneously capture 60% SO2 and 61% HCl and reduce NO(x) concentrations by 26%, when the initial oxygen concentration in the reacting gas was 4%. During the simultaneous reduction of SO2, HCl, and NO(x), it was noted that as the initial oxygen concentration in the reacting gas increased, the efficiency of SO2 capture increased too, but the efficiency of HCl capture and the efficiency of NO(x) destruction decreased.

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“…Chagger et al [8] identified that during the combustion of CH 4 , SO 2 causes a decrease in the concentration of NO X and a small amount of H 2 S is produced. Chagger et al [9] later conducted further research on the primary reactions involved in the sulphur-nitrogen interactions and determined that the dominant reaction during fuel-rich conditions is HS + NO = SN + OH. Through both experiments and numerical simulations, Choudhury et al [10] explored the interaction between sulphur and nitrogen components during combustion, respectively.…”

Section: Introductionmentioning

confidence: 99%

Modelling the Mechanism of Sulphur Evolution in the Coal Combustion Process: The Effect of Sulphur–Nitrogen Interactions and Excess Air Coefficients

Jiang

Yang

2023

Processes

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The efficient use of coal resources and the safe operation of coal-fired boilers are hindered by high-temperature corrosion caused by corrosive sulphur components. To predict the impact of sulphur–nitrogen interactions on sulphur’s evolution and its mechanism of action, a conventional sulphur component evolution model (uS–N) and an improved sulphur component evolution model (S–N) that considers sulphur–nitrogen interactions were proposed in the present study. The models were built using OpenFOAM–v8 software for the coal combustion process, and the generation of SO2, H2S, COS, and CS2 was simulated and analysed under different air excess coefficients. The simulations were conducted to analyse the patterns of SO2, H2S, COS, and CS2 generation at different air excess factors. The results show that, compared with the uS–N condition, the simulated values of coal combustion products (SO2, H2S, COS, and CS2) under the S–N condition were closer to the experimental values, and the errors of different sulphur components at the furnace exit were all less than 5%. As such, the S–N model can more accurately predict the evolution of sulphur components. In the simulation range, when the air excess factor increased from 0.7 to 0.9, the production rate of SO2 increased, while the production rates of corrosive sulphur components H2S, COS, and CS2 decreased significantly by 41.3%, 34.8%, and 53.8%, respectively. Further, the mechanism of the effect of sulphur–nitrogen interactions on the generation rates of different components was revealed at different air excess coefficients. Here, the effect of sulphur–nitrogen interactions on SO2 and COS was found to be more significant at smaller air excess coefficients, and the effect of sulphur–nitrogen interactions on H2S and CS2 was more significant at larger air excess coefficients. The present study can provide a theoretical basis for predicting the evolution of sulphur components during coal combustion and improving the high-temperature corrosion problems caused by such a process.

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The interaction of SO2 and NO in rich combustion zones

Cited by 5 publications

References 9 publications

Calculation of anharmonic effect on the reactions of small sulfur‐containing molecules with NO/NO₂ in combustion

Calculation of anharmonic effect on the reactions of small sulfur‐containing molecules with NO/NO₂ in combustion

A novel additive for the reduction of acid gases and NOx in municipal waste incinerator flue gas

Modelling the Mechanism of Sulphur Evolution in the Coal Combustion Process: The Effect of Sulphur–Nitrogen Interactions and Excess Air Coefficients

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The interaction of SO2 and NO in rich combustion zones

Cited by 5 publications

References 9 publications

Calculation of anharmonic effect on the reactions of small sulfur‐containing molecules with NO/NO2 in combustion

Calculation of anharmonic effect on the reactions of small sulfur‐containing molecules with NO/NO2 in combustion

A novel additive for the reduction of acid gases and NOx in municipal waste incinerator flue gas

Modelling the Mechanism of Sulphur Evolution in the Coal Combustion Process: The Effect of Sulphur–Nitrogen Interactions and Excess Air Coefficients

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Product

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Calculation of anharmonic effect on the reactions of small sulfur‐containing molecules with NO/NO₂ in combustion

Calculation of anharmonic effect on the reactions of small sulfur‐containing molecules with NO/NO₂ in combustion