High pressure effects on the mutual sensitization of the oxidation of NO and CH4–C2H6 blends

Raghu Sivaramakrishnan 1 Kenneth Brezinsky 1 Guillaume Dayma 2 Philippe Dagaut 2
1 UIC - University of Illinois [Chicago]
2 ICARE - Institut de Combustion, Aérothermique, Réactivité et Environnement
Abstract : he mutual sensitization of the oxidation of NO and a CH4–C2H6 (10 : 1) simulated natural gas (NG) blend was studied under fuel lean conditions (Φ = 0.5) at 50 atm and 1000–1500 K in the UIC high pressure shock tube (HPST). New experimental results were also obtained for the mutual sensitization of methane and the NG blend in the CNRS jet stirred reactor (JSR) at 10 atm. A detailed chemical kinetic model was assembled to describe the observed changes in reactivity in the CH4 and NG blends, with and without NO, in the HPST and the JSR. The data and the validated model (tested against a variety of targets) show a reduced difference of reactivity between methane and NG blends in the presence of NO at characteristic reaction times for the JSR (250–1000 µs). However the HPST data and subsequent simulations using the validated model have revealed that at higher pressures and in the millisecond time scale regime representative of the HPST experiments (and practical combustion devices) there still persists a significant difference in reactivity between methane and NG blends in the presence of NO. The experimental data, the model development and validations and its predictions and utility as a tool to probe the NO–hydrocarbon sensitization effects under practical combustion conditions is discussed.
Keywords : methane ethane natural gas Nitric oxide Shock-tube Ignition Delay Jet-stirred reactor Kinetic modeling Oxidation -mechanism
Document type :
Journal articles
Complete list of metadatas
https://hal.archives-ouvertes.fr/hal-02020411
Contributor : Philippe Dagaut <>
Submitted on : Friday, February 15, 2019 - 11:23:23 AM
Last modification on : Thursday, August 1, 2019 - 2:12:40 PM

Links full text

openaccess

Identifiers

Collections

CNRS | UNIV-ORLEANS | CNRS_ICARE

Citation

Raghu Sivaramakrishnan, Kenneth Brezinsky, Guillaume Dayma, Philippe Dagaut. High pressure effects on the mutual sensitization of the oxidation of NO and CH4–C2H6 blends. Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2007, 9 (31), pp.4230. ⟨10.1039/b703379f⟩. ⟨hal-02020411⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

21

Contact

Informations

CCSD