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Title: Wide range modeling study of dimethyl ether oxidation

Abstract

A detailed chemical kinetic model has been used to study dimethyl ether (DME) oxidation over a wide range of conditions. Experimental results obtained in a jet-stirred reactor (JSR) at I and 10 atm, 0.2 < 0 < 2.5, and 800 < T < 1300 K were modeled, in addition to those generated in a shock tube at 13 and 40 bar, 0 = 1.0 and 650 :5 T :5 1300 K. The JSR results are particularly valuable as they include concentration profiles of reactants, intermediates and products pertinent to the oxidation of DME. These data test the Idnetic model severely, as it must be able to predict the correct distribution and concentrations of intermediate and final products formed in the oxidation process. Additionally, the shock tube results are very useful, as they were taken at low temperatures and at high pressures, and thus undergo negative temperature dependence (NTC) behavior. This behavior is characteristic of the oxidation of saturated hydrocarbon fuels, (e.g. the primary reference fuels, n-heptane and iso- octane) under similar conditions. The numerical model consists of 78 chemical species and 336 chemical reactions. The thermodynamic properties of unknown species pertaining to DME oxidation were calculated using THERM.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
302173
Report Number(s):
UCRL-JC-127071; CONF-970495-
ON: DE98050915
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Western State section of the Combustion Institute meeting, Livermore, CA (United States), 14-15 Apr 1997; Other Information: PBD: Apr 1997
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; OXIDATION; DME; REACTION KINETICS; COMBUSTION; ENGINES; MATHEMATICAL MODELS

Citation Formats

Pitz, W J, Marinov, N M, Westbrook, C K, Dagaut, P, Boettner, J-C, and Cathonnet, M. Wide range modeling study of dimethyl ether oxidation. United States: N. p., 1997. Web.
Pitz, W J, Marinov, N M, Westbrook, C K, Dagaut, P, Boettner, J-C, & Cathonnet, M. Wide range modeling study of dimethyl ether oxidation. United States.
Pitz, W J, Marinov, N M, Westbrook, C K, Dagaut, P, Boettner, J-C, and Cathonnet, M. 1997. "Wide range modeling study of dimethyl ether oxidation". United States. https://www.osti.gov/servlets/purl/302173.
@article{osti_302173,
title = {Wide range modeling study of dimethyl ether oxidation},
author = {Pitz, W J and Marinov, N M and Westbrook, C K and Dagaut, P and Boettner, J-C and Cathonnet, M},
abstractNote = {A detailed chemical kinetic model has been used to study dimethyl ether (DME) oxidation over a wide range of conditions. Experimental results obtained in a jet-stirred reactor (JSR) at I and 10 atm, 0.2 < 0 < 2.5, and 800 < T < 1300 K were modeled, in addition to those generated in a shock tube at 13 and 40 bar, 0 = 1.0 and 650 :5 T :5 1300 K. The JSR results are particularly valuable as they include concentration profiles of reactants, intermediates and products pertinent to the oxidation of DME. These data test the Idnetic model severely, as it must be able to predict the correct distribution and concentrations of intermediate and final products formed in the oxidation process. Additionally, the shock tube results are very useful, as they were taken at low temperatures and at high pressures, and thus undergo negative temperature dependence (NTC) behavior. This behavior is characteristic of the oxidation of saturated hydrocarbon fuels, (e.g. the primary reference fuels, n-heptane and iso- octane) under similar conditions. The numerical model consists of 78 chemical species and 336 chemical reactions. The thermodynamic properties of unknown species pertaining to DME oxidation were calculated using THERM.},
doi = {},
url = {https://www.osti.gov/biblio/302173}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 01 00:00:00 EST 1997},
month = {Tue Apr 01 00:00:00 EST 1997}
}

Conference:
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