Accession Number:

ADA148101

Title:

Catalytic Ignition and Combustion of Lean Mixtures.

Descriptive Note:

Final rept.,

Corporate Author:

NORTHWESTERN UNIV EVANSTON IL DEPT OF MECHANICAL ENGINEERING

Personal Author(s):

Report Date:

1984-01-01

Pagination or Media Count:

160.0

Abstract:

Ignition and heat release rates of fueloxygennitrogen 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.

Subject Categories:

  • Industrial Chemistry and Chemical Processing
  • Combustion and Ignition
  • Fuels

Distribution Statement:

APPROVED FOR PUBLIC RELEASE