Catalytic ignition and combustion of lean mixtures. Final report
Technical Report
·
OSTI ID:5812057
Ignition and heat-release rates of fuel/oxygen/nitrogen over platinum wires are experimentally studied using micro-calorimetry, aiming to gain additional understanding on the complex transport and kinetic processes involved during catalytic oxidation so as to relate the macroscopic observables with the microscopic behavior. The fuels studied are propane, butane, propylene, ethylene, carbon monoxide, and hydrogen. Parameters investigated include catalyst surface temperature, fuel and oxygen concentrations, and flow velocity. Results show that, for very low Reynolds number flows, the flow velocity has negligible influences on the ignition temperature. Its influence on the heat release rates is also negligible but only for the reactions in kinetically controlled regime. Variation of fuel concentration is found to be an important factor in that the ignition temperatures of propane and butane decrease as their concentrations are increased from lean to rich mixtures while the opposite trend is observed for propylene, ethylene, carbon monoxide and hydrogen.
- Research Organization:
- Northwestern Univ., Evanston, IL (USA). Dept. of Mechanical Engineering
- OSTI ID:
- 5812057
- Report Number(s):
- AD-A-148101/9/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKANES
ALKENES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSIS
CATALYTIC CONVERTERS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
DISPERSIONS
ELEMENTS
ENERGY TRANSFER
EQUIPMENT
ETHYLENE
FLOW RATE
FUELS
HEAT TRANSFER
HYDROCARBONS
HYDROGEN
IGNITION
KINETICS
METALS
MIXTURES
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
POLLUTION CONTROL EQUIPMENT
PROPANE
REACTION KINETICS
REYNOLDS NUMBER
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKANES
ALKENES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSIS
CATALYTIC CONVERTERS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
DISPERSIONS
ELEMENTS
ENERGY TRANSFER
EQUIPMENT
ETHYLENE
FLOW RATE
FUELS
HEAT TRANSFER
HYDROCARBONS
HYDROGEN
IGNITION
KINETICS
METALS
MIXTURES
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
POLLUTION CONTROL EQUIPMENT
PROPANE
REACTION KINETICS
REYNOLDS NUMBER
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS