Reaction Mechanism for the Removal of NO_x by Wet Scrubbing Using Urea Solution: Determination of Main and Side Reaction Paths.

ABSTRACT: Secondary problems, such as the occurrence of side reactions and the accumulation of by-products, are a major challenge in the application of wet denitrification technology through urea solution. We revealed the formation mechanism of urea nitrate and clarified the main and side reaction paths and key intermediates of denitrification. Urea nitrate would be separated from urea absorption solution only when the concentration product of [urea], [H⁺] and [NO₃^-] was greater than 0.87~1.22 mol³/L³. The effects of the urea concentration (5-20%) and reaction temperature (30-70 °C) on the denitrification efficiency could be ignored. Improving the oxidation degree of the flue gas promoted the removal of nitrogen oxides. The alkaline condition wa

SUBMITTER: Gan L 

PROVIDER: S-EPMC9822094 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature