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Modeling the Nitrogen and Sulfur Chemistry in Pressurized Flue Gas Systems

Sima Ajdari (Institutionen för energi och miljö, Energiteknik) ; Fredrik Normann (Institutionen för energi och miljö, Energiteknik) ; Klas Andersson (Institutionen för energi och miljö, Energiteknik) ; Filip Johnsson (Institutionen för energi och miljö, Energiteknik)
Industrial & Engineering Chemistry Research (0888-5885). Vol. 54 (2015), 4, p. 1216-1227.
[Artikel, refereegranskad vetenskaplig]

A rate-based model is developed to elucidate the chemistry behind the simultaneous absorption of NOx and SOx under pressurized conditions (pressures up to 30 bar) that are applicable to the flue gases obtained from CO2 capture systems. The studied flue gas conditions are relevant to oxy-fuel and chemical-looping combustion systems. The kinetics of the reactions implemented in the model is based on a thorough review of the literature. The chemistry of nitrogen, sulfur, and N-S interactions are evaluated in detail, and the most important reaction pathways are discussed. The effects of pH, pressure, and flue-gas composition on the liquid-phase chemistry are also examined and discussed. Simulations that use existing kinetic data reveal that the pH level has a strong influence on the reaction pathway that is followed and the types of products that are formed in the liquid phase. In addition, the pressure level and the presence of NOx significantly affect the removal of SO2 from the flue gas.

Nyckelord: Oxy-fuel combustion, Aqueous-solution, Hydroxylamine disulfonate, Uncatalyzed oxidation, Bisulfite solutions, Absorption



Denna post skapades 2015-03-16.
CPL Pubid: 213845

 

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Institutioner (Chalmers)

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

Ämnesområden

Energiteknik

Chalmers infrastruktur