Bifunctional Catalysts for the Decomposition of Nitric Oxide

EPA Contract Number: 68D30137
Title: Bifunctional Catalysts for the Decomposition of Nitric Oxide
Investigators: Wickman, David T.
Small Business: TDA Research Inc.
EPA Contact: Manager, SBIR Program
Phase: II
Project Period: September 1, 1993 through September 1, 1996
Project Amount: $150,000
RFA: Small Business Innovation Research (SBIR) - Phase II (1993) Recipients Lists
Research Category: Air Quality and Air Toxics , SBIR - Air Pollution , Small Business Innovation Research (SBIR)


Nitrogen oxides (NO and NO2 or NOx) are among the most pervasive and difficult emissions to control. Although the decomposition reactions of both NO and NO2 are thermodynamically favored, there is no commercial catalytic process capable of decomposing NOx without the addition of a reducing gas. This is because the oxygen produced during the decomposition remains strongly chemisorbed on the catalyst, blocking access of the NO to the catalytic sites and reversibly poisoning the catalyst. NOx decomposition catalysts would be useful in stationary applications because the reducing gas and associated equipment contribute roughly one-half of the total clean-up cost. Such catalysts would also find ready acceptance in mobile applications as there is currently no practical catalytic method for NOx reduction in diesel exhaust.

TDA Research, Inc., proposes to synthesize and test coprecipitated bifunctional catalysts capable of carrying out the decomposition reaction. In Phase I, they modified a metal oxide catalyst to reduce the affinity of the catalyst on the unmodified catalyst. In Phase II, they will synthesize and test new catalyst formulations. They will perform additional characterization experiments with the goal of understanding the nature of the bifunctional catalyst effect in order to optimize the catalyst composition.

Supplemental Keywords:

RFA, Scientific Discipline, Air, Toxics, Sustainable Industry/Business, air toxics, cleaner production/pollution prevention, Sustainable Environment, Chemistry, HAPS, Technology for Sustainable Environment, New/Innovative technologies, Engineering, Engineering, Chemistry, & Physics, Nox, Nitrogen Oxides, Nitrogen dioxide, air pollutants, catalyst composition, zeolites, emission control technologies, control, nitrogren oxides (NOx), gas turbines, novel catalyst systems, air pollution control, nitrogen dioxide (NO2), air pollution, catalyst formulations, catalysts, emission controls, emissions, Nitric oxide, treatment, Substitutes, air pollutant precursors, nitrogen oxides (Nox), acid rain

Progress and Final Reports:

  • Final

  • SBIR Phase I:

    Bifunctional Catalysts for the Decomposition of Nitric Oxide