Abstract
A numerical model of catalytic combustion of natural gas over supported Pt was constructed based on the well-accepted CHEMKIN chemical kinetics formalism for gas-phase and surface chemistry. To support the model development, a research combustor was built presented are measured and modeled axial profiles of temperature, fuel conversion, and pollutant emissions for natural-gas combustion over platinum catalysts supported on ceramic honeycomb monoliths. NOx emissions are below 1 ppm, and CO is observed at ppm levels. The data are taken at several lean equivalence ratios and flow rates. Fuel conversion rates occur in two regimes: a low, constant conversion rate and a higher conversion rate that increases linearly with equivalence ratio. The agreement of the numerical model with the measured data is good at temperatures below 900 K; above this temperature, fuel conversion is underpredicted by as much as a factor of two. The predicted surface ignition temperatures agree well with the measured values. Results from the numerical model indicate that the fractional conversion rate of fuel has a linear dependence on the fraction of available surface reaction sites.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 9 |
| Number of pages | 9 |
| Journal | American Society of Mechanical Engineers (Paper) |
| State | Published - 1996 |
| Externally published | Yes |
| Event | Proceedings of the 1996 International Gas Turbine and Aeroengine Congress & Exhibition - Burmingham, UK Duration: Jun 10 1996 → Jun 13 1996 |
ASJC Scopus subject areas
- Mechanical Engineering