Accession Number : ADA324954

Title :   Final Technical Report on Investigation of Selective Non-Catalytic Processes for In-Situ Reduction of NOx and CO Emissions from Marine Gas Turbines and Diesel Engines.

Descriptive Note : Final technical rept. 1 Apr 94-31 Mar 97,

Corporate Author : STANFORD UNIV CA DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Bowman, Craig T. ; Hanson, Ronald K.

PDF Url : ADA324954

Report Date : 15 MAY 1997

Pagination or Media Count : 14

Abstract : The effectiveness of selective non-catalytic (SNCR) gas-phase reaction processes for NO(x) removal from combustion products at elevated pressures was investigated in a combined experimental and modeling research program. Calculations using existing chemical models for SNCR indicate that the temperature window for NO(x) removal by SNCR widens as pressure increases, resulting in NO(x) removal at higher temperatures than at ambient pressure. The calculations also show a significant reduction in the reaction time scale with increasing pressure. These observations suggest the possibility of utilizing SNCR for reducing NO(x) emissions from marine gas turbines and Diesel engines by direct injection of a reductant species into the combustion chamber, possibly as a fuel additive. Initial experiments were carried out at atmospheric pressure to allow comparison with previous measurements in order to verify the experimental approach. Following these validation tests, experiments were conducted at elevated pressures. Results from these tests, confirm the model predictions that the SNCR window for NO(x) removal widens as the pressure increases. In addition, a project was initiated, to develop compact, robust, solid-state microsensors for pollutant species for use in control systems for reduction of pollutant emissions. The sensor concept is based on integrated circuit fabrication technology that allows the integration of a metal-oxide sensor with associated electronic circuitry on a single chip. Initial efforts focused on development of a sensor for NO(x).

Descriptors :   *EMISSION, *DIESEL ENGINES, *GAS TURBINES, *CARBON MONOXIDE, *NITROGEN OXIDES, *MARINE ENGINES, ELECTRONICS, METALS, INJECTION, REMOVAL, EXPERIMENTAL DATA, CONTROL SYSTEMS, DETECTORS, PREDICTIONS, VALIDATION, MODELS, HIGH TEMPERATURE, REACTION TIME, TEST METHODS, CHIPS(ELECTRONICS), FABRICATION, HIGH PRESSURE, INTEGRATED CIRCUITS, VAPOR PHASES, REDUCTION, OXIDES, RESPONSE, SCALE, PRESSURE, COMBUSTION CHAMBERS, POLLUTANTS, BAROMETRIC PRESSURE, SOLID STATE ELECTRONICS, FUEL ADDITIVES, MICROMINIATURIZATION, COMBUSTION PRODUCTS.

Subject Categories : Inorganic Chemistry
      Marine Engineering
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE