Global kinetic parameters for high-temperature gas-phase reactions

“…In the model 1, Bababushak's model [24] is used for oxidation of C 4 H 6 and for elementary reactions among CO/O 2 /H 2 the kinetics mechanism of Westbrook [25] is adopted. For modeling the oxidation of C 4 H 6 in model 2, the same method as model 1 is used but for oxidation of H 2 the mechanism presented by Brabbs [26] and for oxidation of CO, a single-step mechanism developed by Westbrook and Dryer [23] is applied.…”

Section: Chemical Kinetics Modelsmentioning

confidence: 99%

An investigation on the effect of chemical kinetics in the modeling of combustive gaseous oxidizer flow on a solid fuel surface

Ahangar

Yaghmaei

Ebrahimi

2011

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011

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In this study, the combustion process of gaseous Oxygen on the surface of HTPB (Hydroxyl-Terminated Polybutadiene) solid fuel has been investigated. To simulate the chemically reactive flow, Navier-Stokes equations and species transport equations were solved using LU-SW implicit scheme. Modeling this kind of combustion process demands a deep understanding of the pyrolysis phenomenon on the solid fuel surface. Experimental studies conducted in this field show that the main gaseous product of the pyrolysis process is C 4 H 6 . An experimental equation which is dependent to the temperature of the fuel surface is used to determine the gas production rate during pyrolysis process. The temperature of the fuel surface can be obtained by applying energy equation in gas-solid interface. The combustion process of gaseous Oxygen and C 4 H 6 has been described by two quasi-global chemical kinetics models. According to the obtained results, the main characteristic parameters of combustive flow such as the flame temperature and mass fraction of chemical species are strongly affiliated to the applied chemical kinetics model. Finally, the results of modeling based on two different models of chemical kinetics are presented and solid fuel surface regression rate is compared with other numerical results.

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“…In the presence of water steam and oxygen, carbon monoxide is known to follow the following rate equation (Babushok and Dakdancha, 1993 …”

Section: ) Combustion Of Pyrolytic Gasesmentioning

confidence: 99%

“…Hydrogen is reported to react according to the following rate equation (Babushok and Dakdancha, 1993 …”

Section: ) Combustion Of Pyrolytic Gasesmentioning

confidence: 99%

Dynamic modeling of combustion in a BioGrate furnace: The effect of operation parameters on biomass firing

Boriouchkine

Zakharov

Jämsä‐Jounela

2012

Chemical Engineering Science

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The development of efficient operation and control of a biomass boiler requires extensive knowledge of the combustion process inside the boiler furnace However, it is not possible to obtain the required knowledge through process measurements because the high temperatures and aggressive environment inside the furnace prevent taking accurate sensor readings. Instead, the process can be studied with the help of mathematical modeling. This paper describes dynamic modeling of bed combustion in a BioGrate boiler furnace. The developed dynamic model is heterogeneous, including solid and gas phases and corresponding reactions. The model is used for process phenomena investigation; the results are presented and discussed. Keywords

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Global kinetic parameters for high-temperature gas-phase reactions

Cited by 45 publications

References 87 publications

A study on the dynamic combustion behavior of a biomass fuel bed

A study on the dynamic combustion behavior of a biomass fuel bed

An investigation on the effect of chemical kinetics in the modeling of combustive gaseous oxidizer flow on a solid fuel surface

Dynamic modeling of combustion in a BioGrate furnace: The effect of operation parameters on biomass firing

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