A shock tube study of the thermal decompositions of acetaldehyde and ethylene oxide
Conference
·
· AIP Conference Proceedings (American Institute of Physics); (United States)
OSTI ID:7200649
- Department of Chemistry, University of New Orleans, New Orleans, Louisiana 70148 (United States)
A shock tube coupled to a time-of-flight mass spectrometer was used to investigate the pyrolysis of acetaldehyde (CH{sub 3}CHO) and of ethylene oxide (C{sub 2}H{sub 4}O) over the temperature and total pressure range of 1200--1800 K and 0.19--0.40 atm, respectively. CO and CH{sub 4} are major products; C{sub 2}H{sub 2} and C{sub 2}H{sub 4} occur in minor amounts. A 26 step reaction mechanism is proposed to model the concentration profiles recorded at different temperatures for acetaldehyde pyrolysis. Computer modeling indicates that isomerization of ethylene oxide to acetaldehyde occurs rapidly and the process is complete in about 50 {mu}s at 1400 K. Additional steps were added to the acetaldehyde thermal decomposition mechanism in order to model successfully the ethylene oxide data. Overall rate constants for the decomposition of C{sub 2}H{sub 4}O{r arrow}CH{sub 3}CHO; k{sub 1}=1.4E13 exp({minus}29500/T) s{sup {minus}1} and C{sub 2}H{sub 4}O{r arrow}CH{sub 3}+HCO; k{sub 2}=1.2E13 exp({minus}29500/T) s{sup {minus}1} were employed for the reaction conditions herein.
- DOE Contract Number:
- FG02-85ER13340
- OSTI ID:
- 7200649
- Report Number(s):
- CONF-890756--
- Conference Information:
- Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 208:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dynamics of multidissociation paths of acetaldehyde photoexcited at 157 nm: Branching ratios, distributions of kinetic energy, and angular anisotropies of products
Selective synthesis of acetaldehyde applying a fuel cell system in the gas phase
Use of hydrogen chloride as a probe for the determination of primary processes in acetaldehyde photolysis
Journal Article
·
Fri Nov 06 23:00:00 EST 2009
· Journal of Chemical Physics
·
OSTI ID:21559802
Selective synthesis of acetaldehyde applying a fuel cell system in the gas phase
Journal Article
·
Sun Jul 01 00:00:00 EDT 1990
· Journal of the Electrochemical Society; (USA)
·
OSTI ID:6489433
Use of hydrogen chloride as a probe for the determination of primary processes in acetaldehyde photolysis
Journal Article
·
Thu Aug 28 00:00:00 EDT 1986
· J. Phys. Chem.; (United States)
·
OSTI ID:5333718
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ACETALDEHYDE
ALDEHYDES
ALKENES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION KINETICS
DECOMPOSITION
ETHYLENE
HYDROCARBONS
ISOMERIZATION
KINETICS
LOW PRESSURE
MASS SPECTROMETERS
MEASURING INSTRUMENTS
ORGANIC COMPOUNDS
PYROLYSIS
REACTION KINETICS
SHOCK TUBES
SHOCK WAVES
SPECTROMETERS
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
THERMOCHEMICAL PROCESSES
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ACETALDEHYDE
ALDEHYDES
ALKENES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION KINETICS
DECOMPOSITION
ETHYLENE
HYDROCARBONS
ISOMERIZATION
KINETICS
LOW PRESSURE
MASS SPECTROMETERS
MEASURING INSTRUMENTS
ORGANIC COMPOUNDS
PYROLYSIS
REACTION KINETICS
SHOCK TUBES
SHOCK WAVES
SPECTROMETERS
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
THERMOCHEMICAL PROCESSES