Gas phase oxidation downstream of a catalytic combustor

Conference · Mon Jan 01 00:00:00 EST 1979

OSTI ID:5185775

T'ien, J S; Anderson, D N

The objective of the experiments reported here was to determine what effect the length available for gas-phase reactions downstream of the catalytic reactor has on the emissions of CO and unburned hydrocarbons. A premixed, prevaporized propane/air feed to a 12-cm-dia catalytic-reactor test section was used. The catalytic reactor was made of four 2.5-cm-long monolithic catalyst elements. Four water-cooled gas-sampling probes were located at positions between 0 and 22 cm downstream of the catalytic reactor. Measurements of unburned hydrocarbons, CO, and CO/sub 2/ were made. Tests were performed with an inlet-air temperature of 800/sup 0/K, a reference velocity of 10 m/s, pressures of 3 and 6 x 10/sup 5/ Pa, and fuel-air equivalence ratios of 0.14 to 0.24. For very lean mixtures, hydrocarbon emissons were high and CO continued to be formed downstream of the catalytic reactor. At the highest equivalence ratios tested, hydrocarbon levels were much lower and CO was oxidized to CO/sub 2/ in the gas-phase downstream. To achieve acceptable emissions, a downstream region several times longer than the catalytic reactor could be required.

• Research Organization: Case Western Reserve Univ., Cleveland, OH (USA); National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• DOE Contract Number: AI01-77CS51040
• OSTI ID: 5185775
• Report Number(s): DOE/NASA/1040-16; NASA-TM-81551; CONF-7903134-1
• Resource Relation: Conference: 13. middle atlantic regional meeting of the American Chemical Society, West Long Branch, NJ, USA, 19 Mar 1979
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
CARBON MONOXIDE
AIR POLLUTION CONTROL
CATALYTIC COMBUSTORS
DESIGN
PERFORMANCE
HYDROCARBONS
AUTOMOBILES
EXHAUST GASES
EXPERIMENTAL DATA
OXIDATION
PERFORMANCE TESTING
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTORS
DATA
GASEOUS WASTES
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
TESTING
VEHICLES
WASTES
330702* - Emission Control- Carbon Monoxide
330704 - Emission Control- Hydrocarbons