Catalytic Reduction of Nitric Oxide in Net Oxidizing Environments

EPA Contract Number: 68D10048
Title: Catalytic Reduction of Nitric Oxide in Net Oxidizing Environments
Investigators: Wright, John D.
Small Business: TDA Research Inc.
EPA Contact: Manager, SBIR Program
Phase: I
Project Period: September 1, 1991 through March 1, 1992
Project Amount: $50,000
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)


Nitrogen oxides (NO and NO, or NO.,) are among the most pervasive and difficult emissions to control. Although the decomposition of the major species (NO) is thermo-dynamically favored, there are no catalytic processes capable of decomposing NO. without the addition of a reducing gas. This is because the oxygen produced during the decompo- sition remains strongly chemisorbed on the catalyst, block- ing access of the NO to the catalytic sites and reversibly poisoning the catalyst. Because the reducing gas contributes roughly one-half of the total cleanup cost, a direct catalytic decomposition process which did not require the use of a reducing gas would be a major advance.

TDA Research, Inc., (TDA) proposes to develop substi- tute zeolites capable of carrying out this reaction. These materials desorb the oxygen at a lower temperature than do other materials, allowing the reaction to proceed. TDA will synthesize substitute zeolites and evaluate the performance of these materials under conditions representative of the exhaust of a gas turbine. Then TDA will develop improved catalysts through manipulation of both the structure and composition of the zeolite, as well as the catalytically active cations.

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, Nitrogen dioxide, Nox, air pollutants, catalyst composition, control, emission control technologies, zeolites, nitrogren oxides (NOx), gas turbines, nitrogen dioxide (NO2), novel catalyst systems, air pollution control, air pollution, catalyst formulations, catalysts, emission controls, emissions, Nitric oxide, treatment, Substitutes, nitrogen oxides (Nox), air pollutant precursors, acid rain

Progress and Final Reports:

  • Final