Kinetic Modeling of Hydrocarbon/Nitric Oxide Interactions in a Flow Reactor

Glarborg, Peter; Alzueta, María U.; Dam‐Johansen, Kim; Miller, James A.

doi:10.1016/s0010-2180(97)00359-3

Cited by 479 publications

(438 citation statements)

References 107 publications

Supporting

Mentioning

416

Contrasting

Order By: Relevance

“…5 The reduced mechanism is then integrated into the three-dimensional (3D) combustion simulation CFD program "AIOLOS". The simulation results agree well with the experimental data for CH 4 reburning during pulverized coal combustion. Further, Han et al developed a 10 steps, 14 species reduced mechanism for advanced reburning.…”

Section: Introductionsupporting

confidence: 80%

“…11 The reduced mechanism was derived from a 105 steps, 39 species skeletal mechanism, which was based on the "GADM98" mechanism with 438 steps, 64 species. 4 CFD simulations were performed with the reduced kinetics for pure reburning and hybrid reburn/SNCR in a coalfired reactor. The comprehensive modeling gave quite satisfactory results for wide ranges of the parameters.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Detailed Modeling of NO_x and SO_x Formation in Co-combustion of Coal and Biomass with Reduced Kinetics

Wei

Guo

et al. 2012

Energy Fuels

View full text Add to dashboard Cite

In the paper, the numerical simulation program coupled with the detailed chemical reaction mechanism and computational fluid dynamics software was applied to calculate the concentration profiles of CO, NO x , and SO x during cocombustion of coal and biomass. The predicted data are compared to experimental results in an entrained flow combustion reactor to validate the numerical method for pulverized coal combustion. The characteristics of pollutant emissions in cocombustion with coal and three typical kinds of biomasses (Swedish wood, Danish straw, and sewage sludge) are also investigated. NO formation is significantly affected by the reactor temperature, and an increasing temperature obviously enhances the NO concentration. In the range of the calculated temperature, the final SO 2 emission level is not obviously influenced by the temperature. Co-combustion technology could effectively reduce the pollutant emissions, and the effect is proportional to the blending ratio of biomass. The biomass with low contents of nitrogen and sulfur and a high volatile content and lower heating value is an ideal co-fired fuel to reduce NO and SO 2 emissions.

show abstract

Section: Introductionsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Detailed Modeling of NO_x and SO_x Formation in Co-combustion of Coal and Biomass with Reduced Kinetics

Wei

Guo

et al. 2012

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…The starting mechanism was drawn from the recent study of NH 3 -doped CH 4 /O 2 /Ar flames [13]. This mechanism relied on work on the oxidation of C 1 /C 2 -hydrocarbons [55,56], NH 3 [57], and HCN [3], as well as interactions of these components [11,55,58,59]. Thermal NO and prompt NO formation mechanisms [1,60] are not important in the present flames due to the high concentrations of amines.…”

Section: Reaction Mechanismmentioning

confidence: 99%

Fuel-nitrogen conversion in the combustion of small amines using dimethylamine and ethylamine as biomass-related model fuels

Lucassen

Zhang

Warkentin

et al. 2012

Combustion and Flame

Self Cite

View full text Add to dashboard Cite

Laminar premixed flames of the two smallest isomeric amines, dimethylamine and ethylamine, were investigated under one-dimensional low-pressure (40 mbar) conditions with the aim to elucidate pathways that may contribute to fuel-nitrogen conversion in the combustion of biomass. For this, identical flames of both fuels diluted with 25% Ar were 2 studied for three different stoichiometries (Φ=0.8, 1.0, and 1.3) using in situ molecular-beam mass spectrometry (MBMS). Quantitative mole fractions of reactants, products and numerous stable and reactive intermediates were determined by electron ionization (EI) MBMS with high mass resolution to separate overlapping features from species with different heavy elements by exact mass. Species assignment was assisted by using single-photon vacuum- We attempted to analyze the major pathways in the two flames with a detailed combustion model developed for this purpose. For this, thermochemical values for a number of intermediates had to be determined from quantum chemistry calculations. Also, specific sets of reactions were incorporated for the two fuels. While many trends seen in the experiments can be successfully reproduced by the simulations, additional efforts may be needed to reliably describe the fuel-nitrogen chemistry in the combustion of biomass-related model fuels with amine functions.

show abstract

“…The oxidation subsets were compiled and validated against a broad range of CO 2 and O 2 concentrations by Glarborg and Bendtsen [15]. Their mechanism is based mostly on work by previous authors on oxidation of CO/H 2 [32], CH 2 O [33], CH 3 OH [34], and C 2 -C 3 hydrocarbons [35][36][37][38][39]. Mech B is compiled in the present work and has never been validated as whole, although the subsets are validated for their individual use.…”

Section: Modelling Proceduresmentioning

confidence: 99%

The effect of oxygen and volatile combustibles on the sulphation of gaseous KCl

Kassman

Normann

Åmand

2013

Combustion and Flame

View full text Add to dashboard Cite

a b s t r a c tSulphur/sulphate containing additives, such as elemental sulphur (S) and ammonium sulphate (NH 4 ) 2 SO 4 ), can be used for sulphation of KCl during biomass combustion. These additives convert KCl to an alkali sulphate and a more efficient sulphation is normally achieved for ammonium sulphate compared to sulphur. The presence of SO 3 is thus of greater importance than that of SO 2 . Oxygen and volatile combustibles could also have an effect on the sulphation of gaseous KCl. This paper is based on results obtained during co-combustion of wood chips and straw pellets in a 12 MW circulating fluidised bed (CFB) boiler. Ammonium sulphate was injected at three positions in the boiler i.e. in the upper part of the combustion chamber, in the cyclone inlet, and in the cyclone. The sulphation of KCl was investigated at three air excess ratios (k = 1.1, 1.2 and 1.4). Several measurement tools were applied including IACM (on-line measurements of gaseous alkali chlorides), deposit probes (chemical composition in deposits collected) and gas analysis. The position for injection of ammonium sulphate had a great impact on the sulphation efficiency for gaseous KCl at the different air excess ratios. There was also an effect of oxygen on the sulphation efficiency when injecting ammonium sulphate in the cyclone. Less gaseous KCl was reduced during air excess ratio k = 1.1 compared to the higher air excess ratios. The optimal position and conditions for injection of ammonium sulphate were identified by measuring KCl with IACM. A correlation was observed between the sulphation of gaseous KCl and reduced chlorine content in the deposits. The experimental observations were evaluated using a detailed reaction mechanism. It was used to model the effect of volatile combustibles on the sulphation of gaseous KCl by SO 3 . The calculations supported the proposition that the presence of combustibles at the position of SO 3 injection (i.e. AS) causes reduction of SO 3 to SO 2 .

show abstract

Kinetic Modeling of Hydrocarbon/Nitric Oxide Interactions in a Flow Reactor

Cited by 479 publications

References 107 publications

Detailed Modeling of NO_x and SO_x Formation in Co-combustion of Coal and Biomass with Reduced Kinetics

Detailed Modeling of NO_x and SO_x Formation in Co-combustion of Coal and Biomass with Reduced Kinetics

Fuel-nitrogen conversion in the combustion of small amines using dimethylamine and ethylamine as biomass-related model fuels

The effect of oxygen and volatile combustibles on the sulphation of gaseous KCl

Contact Info

Product

Resources

About

Kinetic Modeling of Hydrocarbon/Nitric Oxide Interactions in a Flow Reactor

Cited by 479 publications

References 107 publications

Detailed Modeling of NOx and SOx Formation in Co-combustion of Coal and Biomass with Reduced Kinetics

Detailed Modeling of NOx and SOx Formation in Co-combustion of Coal and Biomass with Reduced Kinetics

Fuel-nitrogen conversion in the combustion of small amines using dimethylamine and ethylamine as biomass-related model fuels

The effect of oxygen and volatile combustibles on the sulphation of gaseous KCl

Contact Info

Product

Resources

About

Detailed Modeling of NO_x and SO_x Formation in Co-combustion of Coal and Biomass with Reduced Kinetics

Detailed Modeling of NO_x and SO_x Formation in Co-combustion of Coal and Biomass with Reduced Kinetics