CR Clean Air offers various scrubbing technologies for removing NOx.
Depending on the NOx ratio, a simple aqueous sodium hydroxide solution can be utilized for scrubbing. The by-products formed in the solution are sodium nitrate and sodium nitrite.
For high NO levels, we offer an alternative scrubbing approach with counter current packed bed absorbers arranged in a single or multiple staged configuration. The first stage uses an oxidizing agent to oxidize the NO portion of the NOx to NO2 and other oxidized NOx species. A second stage may be required with use of a reducing solution to reduce NO2 to N2. This approach can be used for varied NO2/NO ratios.