Patent ID: 7498009
Filing Date: 2009-03-03
Classification: B01D

Abstract:
1. The SUVR method for reducing or substantially eliminating oxides of nitrogen (NO x ) from an effluent gas stream between 300-800° K and that contains oxygen gas (O 2 ) by reacting NO x with the amidogen radical (NH 2 *) to form to harmless nitrogen gas (N 2 ) and water vapor (H 2 O), the method including the steps: a) providing a source of ultraviolet radiation with output between 180 nm and 220 nm associated with a duct containing the effluent stream, or streams, b) mixing ammonia or an ammonia-based reagent with said stream, upstream of said ultraviolet radiation source so that the variance is within +15/−5% of stoichiometric concentration, c) causing said ultraviolet radiation source to irradiate the stream with effective wavelength band and intensity flux sufficient to dissociate the ammonia molecules (NH d) and controlling the rate of ammonia or ammonia based reagent added to said stream including measuring upstream NO