scholarly journals Low-temperature combustion chemistry of biofuels: Pathways in the low-temperature (550–700K) oxidation chemistry of isobutanol and tert-butanol

2013 ◽  
Vol 34 (1) ◽  
pp. 493-500 ◽  
Author(s):  
Oliver Welz ◽  
John D. Savee ◽  
Arkke J. Eskola ◽  
Leonid Sheps ◽  
David L. Osborn ◽  
...  
Keyword(s):  
Low Temperature ◽  
Low Temperature Combustion ◽  
Combustion Chemistry ◽  
Tert Butanol ◽  
Temperature Combustion ◽  
Oxidation Chemistry

scholarly journals Low-temperature combustion chemistry of novel biofuels: resonance-stabilized QOOH in the oxidation of diethyl ketone

2014 ◽  
Vol 16 (26) ◽  
pp. 13027-13040 ◽  
Author(s):  
Adam M. Scheer ◽  
Oliver Welz ◽  
Judit Zádor ◽  
David L. Osborn ◽  
Craig A. Taatjes
Keyword(s):  
Low Temperature ◽  
Low Temperature Combustion ◽  
Combustion Chemistry ◽  
Diethyl Ketone ◽  
Temperature Combustion

Combustion of Aldehydes in the Negative Temperature Coefficient Region: Products and Pathways

2016 ◽  
Author(s):  
Ghazal Barari ◽  
Batikan Koroglu ◽  
Artëm E. Masunov ◽  
Subith Vasu
Keyword(s):  
Low Temperature ◽  
Negative Temperature ◽  
Excess Oxygen ◽  
Low Temperature Combustion ◽  
Time Resolved ◽  
Temperature Oxidation ◽  
Acetaldehyde Oxidation ◽  
Temperature Combustion ◽  
Signal Peak ◽  
Oxidation Chemistry

Aldehydes are major intermediates in oxidation and pyrolysis of hydrocarbons and particularly biofuels. While the high temperature oxidation chemistry of C3-C5 aldehydes have been studied in the literature, a comprehensive low temperature kinetics remains unaddressed. In this work, acetaldehyde, propanal, and 2-propenal (acrolein) oxidation was investigated at low-temperature combustion condition (500–700 K). The isomer specific products concentrations as well as the time-resolved profiles were studied using Sandia’s multiplexed photoionization mass spectroscopy (MPIMS) with synchrotron radiation from the Advanced Light Source (ALS). The laser pulsed photolysis generates chlorine atoms which react with aldehydes to form the parent radicals. In the presence of excess oxygen, these radicals react with O2 and form RO2 radicals. The temperature dependent products yields are determined for 500 K to 700 K and the competition between the channels contributing to the formation of each product is discussed. In acetaldehyde oxidation, the formation of the main products are associated with HO2 elimination channel from QOOH or direct H atom elimination from the parent radicals. In propanal oxidation, the most intensive signal peak was associated with acetaldehyde (m/z=44) which was formed through the reaction of α′-R with O2. α′-RO2 intermediate decomposes to acetaldehyde+OH+CO via Waddington mechanism and formation of five-member ring transition state. In 2-propenal oxidation, the unsaturated radical produced from α-R reacts with O2 to form the primary products.

Low-Temperature Combustion Chemistry of n-Butanol: Principal Oxidation Pathways of Hydroxybutyl Radicals

2013 ◽  
Vol 117 (46) ◽  
pp. 11983-12001 ◽  
Author(s):  
Oliver Welz ◽  
Judit Zádor ◽  
John D. Savee ◽  
Leonid Sheps ◽  
David L. Osborn ◽  
...  
Keyword(s):  
Low Temperature ◽  
Low Temperature Combustion ◽  
Combustion Chemistry ◽  
Temperature Combustion
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