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Reburning in oxy-fuel combustion: A parametric study of the combustion chemistry

Fredrik Normann (Institutionen för energi och miljö, Energiteknik) ; Klas Andersson (Institutionen för energi och miljö, Energiteknik) ; Filip Johnsson (Institutionen för energi och miljö, Energiteknik) ; Bo Leckner (Institutionen för energi och miljö, Energiteknik)
Industrial & Engineering Chemistry Research (0888-5885). Vol. 49 (2010), 19, p. 9088-9094.
[Artikel, refereegranskad vetenskaplig]

The present work investigates reburning reduction of nitrogen oxides in oxy-fuel combustion by means of a detailed reaction mechanism applied to a plug-flow reactor. Reburning reactions, which are known to convert NO x into N2, are of special interest in oxy-fuel combustion because of extensive recirculation of flue gases, including NOx, to the flame. Furthermore, the high concentration of carbon dioxide in oxy-fuel combustion is known to influence the radical pool (H/O/OH), which is critical to the combustion chemistry. In the present work, it is shown how the changes in the radical pool alter the nitrogen chemistry both directly and indirectly by influencing the formation and oxidation of hydrocarbon radicals. It is shown that reburning is more sensitive to the combustion temperature but is less affected by the combustion stoichiometry under oxy-fuel compared to air conditions. The main reasons are the impact of increased CO2 concentration on hydrocarbon oxidation and the increased importance of CH 3 as a reactant in oxy-fuel combustion.

Denna post skapades 2010-10-19. Senast ändrad 2017-08-17.
CPL Pubid: 127773


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Institutioner (Chalmers)

Institutionen för energi och miljö, Energiteknik (2005-2017)


Mekanisk energiteknik
Kemisk energiteknik

Chalmers infrastruktur