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Valid alternatives to the selective catalytic reduction (SCR) process for the removal of nitrogen oxides from waste gases (denoxing) may be found in wet scrubbing processes where the low solubility of NO in aqueous media is enhanced by the application of chelate complexes. This paper compares the use of Fe(II)EDTA and Fe(II)NTA as denoxing agents by studying their equilibrium constants over a range of temperatures. Although the equilibrium constant for Fe(II)NTA is approximately 25 % lower than the constant for Fe(II)EDTA, considering the price difference between the two complexants, Fe(II)NTA is an interesting alternative to Fe(II)EDTA.

Additional information

Authors: HOFELE J, JRC Ispra (IT);VAN VELZEN D, JRC Ispra (IT);LANGENKAMP H, JRC Ispra (IT);SCHABER K, Universität Karlsruhe, Institut für Technische Thermodynamik und Kältetechnik (DE)
Bibliographic Reference: Article: Chemical Engineering and Processing (1995)
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