Removal of nitrogen oxides from industrial waste gases by absorption in aqueous Fe-EDTA solutions
This paper describes laboratory-scale investigations of the absorption of NO in aqueous solutions of Fe(II)-EDTA. The technical process consists of the absorption and subsequent regeneration of the enriched absorbent solution. The equilibrium constant and the reaction enthalpy of the reaction were determined systematically over a temperature range of 3.8-90.4 C. A process model for the absorption of NO in Fe(II)EDTA solutions was developed on the basis of the two-film theory, taking into account gas and liquid film resistances. The effect of the reaction rate on the absorption process was expressed by means of an enhancement factor E. This factor has a maximum value for a fresh absorbent and decreases in inverse proportion to the conversion of the absorbent, until chemical equilibrium is reached when E = 0. The simple process model adequately describes the time dependence of the absorption process when the reaction is carried out in a bubble flask reactor. Agreement between experimental and calculated results is very satisfactory.
Bibliographic Reference: Paper presented: Environmental Pollution and its Impact on Life in the Mediterranean, Como (IT), Oct. 6-9, 1991
Availability: Available from (1) as Paper EN 36528 ORA
Record Number: 199210083 / Last updated on: 1994-12-02
Original language: en
Available languages: en