Journal article
Oxygenate and odor formation in a precombustion flow reactor
Symposium, International, on Combustion, v 19(1), pp 1331-1338
1982
Abstract
A premixed, prevaporized, preignition flow reactor has been designed, built, and instrumentedfor studying diesel exhaust oxygenate/odor formation reactions during the preignition reaction phase of combustion. Sampling and analysis techniques were based on the Diesel Odor Analysis System (DOAS), which measures exhaust oxygenates and is correlated with odor intensity. Flow reactor stoichiometry, fuel and oxidizer concentrations, space velocity, and reactant temperature and residence time were investigated for their effects on oxygenate/odor formation. Very lean dodecane/air mixtures (100 ≤A/F≤150, 0.10≤≤0.15) were investigated at temperatures between 0.01 and 0.16 sec. All experiments were at atmospheric pressure. Oxygenate/odor formation was very close to first order in reactant concentration and the measured concentrations of odorants accelerated with residence time indicating a chain branching mechanism. Reaction rates increased with temperature, as expected, but above 340°C a leveling off was observed such that an apparent steady state oxygenate/odor concentration was eventually reached.
An empirical global rate expression was derived for describing the preignition oxygenate/odorformation process. The resultant expression is: RR=10
20.85 exp(−18,460/T)[F]
0.87 [O
2]
1.0 where the reaction rate is in moles of oxygenates per liter per second and the reactant concentrations are in moles per liter. This expression was found to satisfactorily predict the experimental data at temperatures below 350°C.
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Details
- Title
- Oxygenate and odor formation in a precombustion flow reactor
- Creators
- F.T. Hsieh - Drexel UniversityR.S. Cohen - Drexel UniversityN.P. Cernansky - Drexel University
- Publication Details
- Symposium, International, on Combustion, v 19(1), pp 1331-1338
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- [Retired Faculty]
- Scopus ID
- 2-s2.0-0020273448
- Other Identifier
- 991019174142604721