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An Improved Thermal Selective Noncatalytic NOx Reduction Technique for Stationary Sources

EPA Contract Number: 68D10049
Title: An Improved Thermal Selective Noncatalytic NOx Reduction Technique for Stationary Sources
Investigators: Heap, Michael
Small Business: Reaction Engineering International
EPA Contact: Manager, SBIR Program
Phase: I
Project Period: September 1, 1991 through March 1, 1992
Project Amount: $49,612
RFA: Small Business Innovation Research (SBIR) - Phase I (1990)
Research Category: Air Quality and Air Toxics , SBIR - Air

Description:

Selective NO reduction techniques involving the injec- tion of nitrogen-containing compounds, such as ammonia, to combustion products over a relatively narrow tempera- ture range have been used for some time. Systems have been installed on gas-, oil-, and coal-fired boilers, on process heaters, and on municipal waste incinerators. How- ever, these systems are limited in their control effective- ness. Thermal selective reduction techniques are effective only in a narrow temperature window. In large systems, this window may shift as the combustor operation changes, reducing effectiveness and assuming ammonia slip. Reaction Engineering International's previous research studies sug- gest that there are ways to increase the effectiveness of selective thermal reduction techniques.

The objective of the Phase I research program is to extend the understanding of the influence of CO/H2/O2 concentrations on the reduction of NOx by selective reducing reagents in order to define the process requirements for the improved control technique.

The specific goals of Phase I are to: (1) conduct a series of parametric experiments under well defined conditions to establish the parameters controlling NOx reduction when using various nilrogen-reducing reagents in the presence of carbon monoxide, hydrogen, and oxygen; (2) determine the concentrations of CO, N2O, NO, and reduced nitrogen species in the effluent gases; (3) determine why solid reagents are more effective than gaseous reagents; and (4) modify an existing model to describe the results of the experiments.

Supplemental Keywords:

Toxics, Air, Sustainable Industry/Business, Scientific Discipline, Technology for Sustainable Environment, Engineering, Chemistry, & Physics, HAPS, air toxics, Chemistry, cleaner production/pollution prevention, New/Innovative technologies, nitrogen oxides (Nox), treatment, selective non-catalytic reduction, Nox, nitrogren oxides (NOx), selective noncatalytic reduction, acid rain, air pollutants, Nitrogen Oxides, air pollutant precursors, air pollution, air pollution control, control, selective non-catalytic reduction (SNCR), NOx reduction, thermal selective noncatalytic reduction technique, stationary sources

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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.

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