Evaluation of NO_X Removal from Simulated Flue Gas by "Absorption-Oxidation-Reduction" Method

Abstract:

This paper presented a new method of absorption-oxidation-reduction which used ferrous sulfate solution as absorbent, oxygen as oxidizer and urea as reducer to remove NO_X from flue gas based on the properties of Fe²⁺, NO, [Fe (NO)]²⁺ and urea. These properties included that Fe²⁺ and NO could produce [Fe (NO)]²⁺, furthermore [Fe (NO)]²⁺ was easy to be oxidized by O₂, as well as urea can reduce HNO₂ and HNO₃ in the absorption liquid. This research was to discuss its absorption and removal mechanism with the influence of the initial urea concentration, pH value, initial NO_X concentration and gas flow rate on the NO_X removal efficiency. The results showed that the removal efficiency of NO_X would increase when the initial concentration of urea and NO_X increased, while the pH value and gas flow rate decreased.

• Periodical: Advanced Materials Research (Volumes 884-885)
• Pages: 261-265
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.884-885.261
• Online since: January 2014
• Authors: Bao Lin Li*, Ming Yu Li, Hai Hao Liu, Gang Cao, Gang Ren, Lin Song, Xiang Dong Ye
• Keywords: Complexing Absorption, Ferrous Sulfate, Flue Gas, Nitrogen Oxides, Urea

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