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 (1991) RFA Text |  Recipients Lists
Research Category: Air Quality and Air Toxics , SBIR - Air Pollution , Small Business Innovation Research (SBIR)


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:

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

Progress and Final Reports:

  • Final