AN INVESTIGATION OF THE GAS-PHASE OXIDATION OF ACETALDEHYDE BY MEANS OF A RAPID-SCANNING MASS SPECTROMETER

1957 ◽  
Vol 35 (2) ◽  
pp. 115-123 ◽  
Author(s):  
L. P. Blanchard ◽  
J. B. Farmer ◽  
C. Ouellet
Keyword(s):  
Carbon Dioxide ◽  
Induction Period ◽  
Gas Phase ◽  
Mass Spectrometer ◽  
Peracetic Acid ◽  
Reaction Mechanisms ◽  
Continuous Sampling ◽  
Phase Oxidation ◽  
Gas Phase Oxidation ◽  
Rapid Scanning

A mass spectrometer equipped for continuous sampling and capable of producing 60 spectra per second has been used to follow the oxidation of acetaldehyde at temperatures in the region of 250 °C. In normal slow oxidation peracetic acid was formed and then decomposed into carbon dioxide, methanol, and water. Under flame conditions peracetic acid built up in an autocatalytic manner during the induction period and vanished suddenly at the onset of the flame. Possible reaction mechanisms are discussed. Temperature surges during cool and hot flames are estimated.

Computer based generation of reaction mechanisms for gas-phase oxidation

2000 ◽  
Vol 24 (5) ◽  
pp. 541-560 ◽  
Author(s):  
V Warth ◽  
F Battin-Leclerc ◽  
R Fournet ◽  
P.A Glaude ◽  
G.M Côme ◽  
...  
Keyword(s):  
Gas Phase ◽  
Reaction Mechanisms ◽  
Phase Oxidation ◽  
Computer Based ◽  
Gas Phase Oxidation

ChemInform Abstract: KINETICS OF THE GAS-PHASE OXIDATION OF ACETALDEHYDE TO PERACETIC ACID

1977 ◽  
Vol 8 (8) ◽  
pp. no-no
Author(s):  
V. A. BRYUKHOVETSKII ◽  
S. S. LEVUSH ◽  
F. B. MOIN ◽  
V. U. SHEVCHUK
Keyword(s):  
Gas Phase ◽  
Peracetic Acid ◽  
Phase Oxidation ◽  
Gas Phase Oxidation ◽  
Kinetics Of

scholarly journals Electrochemical gas phase oxidation of hydrogen chloride to chlorine: Model-based analysis of transport and reaction mechanisms

2019 ◽  
Vol 324 ◽  
pp. 134780 ◽  
Author(s):  
Simon Bechtel ◽  
Antonio Sorrentino ◽  
Tanja Vidaković-Koch ◽  
Adam Z. Weber ◽  
Kai Sundmacher
Keyword(s):  
Gas Phase ◽  
Hydrogen Chloride ◽  
Reaction Mechanisms ◽  
Model Based ◽  
Phase Oxidation ◽  
Oxidation Of Hydrogen ◽  
Gas Phase Oxidation ◽  
Model Based Analysis

Catalytic Oxidation of Isobutene on a Polycomponent Catalyst

1993 ◽  
Vol 58 (12) ◽  
pp. 2867-2874
Author(s):  
Jaroslav Machek ◽  
Josef Tichý ◽  
Jiří Švachula
Keyword(s):  
Carbon Dioxide ◽  
Acetic Acid ◽  
Gas Phase ◽  
Oxide Catalyst ◽  
Butyl Alcohol ◽  
Oxidation Products ◽  
Simultaneous Increase ◽  
Industrial Preparation ◽  
Phase Oxidation ◽  
Gas Phase Oxidation

The catalytic gas-phase oxidation of isobutene has been studied on polycomponent Mo-Co-Ni-Bi-Fe-K oxide catalyst suitable for industrial preparation of propenal from propene. It has been found that within the temperature interval 290 - 350 °C the main oxidation products are 2-methylpropenal, acetone, 2-methylpropenoic acid, acetic acid and carbon dioxide. A modification of the mentioned catalyst by addition of a further component (W, P, Te, and Zn) showed that zinc increases the conversion of isobutene and at the same time markedly increases its selectivity for 2-methylpropenal, whereas the additions of tungsten and phosphorus decrease the conversion of isobutene with simultaneous increase of selectivity for CO2. If tert-butyl alcohol is used as the starting material instead of isobutene, then the extent of reaction is slightly decreased with simultaneous increase of selectivity for 2-methylpropenal, whereas the selectivities for the acids remain almost unchanged.

Gas phase oxidation of furfural to maleic anhydride on V 2 O 5 /γ-Al 2 O 3 catalysts: Reaction conditions to slow down the deactivation

2017 ◽  
Vol 348 ◽  
pp. 265-275 ◽  
Author(s):  
N. Alonso-Fagúndez ◽  
M. Ojeda ◽  
R. Mariscal ◽  
J.L.G. Fierro ◽  
M. López Granados
Keyword(s):  
Maleic Anhydride ◽  
Gas Phase ◽  
Reaction Conditions ◽  
Phase Oxidation ◽  
Gas Phase Oxidation

scholarly journals Volatility of secondary organic aerosol during OH radical induced ageing

2011 ◽  
Vol 11 (21) ◽  
pp. 11055-11067 ◽  
Author(s):  
K. Salo ◽  
M. Hallquist ◽  
Å. M. Jonsson ◽  
H. Saathoff ◽  
K.-H. Naumann ◽  
...  
Keyword(s):  
Gas Phase ◽  
Organic Aerosol ◽  
Oh Radical ◽  
High Concentration ◽  
Volatile Material ◽  
Phase Oxidation ◽  
Gas Phase Oxidation ◽  
Institute Of Technology ◽  
Set Up ◽  
Pinic Acid

Abstract. The aim of this study was to investigate oxidation of SOA formed from ozonolysis of α-pinene and limonene by hydroxyl radicals. This paper focuses on changes of particle volatility, using a Volatility Tandem DMA (VTDMA) set-up, in order to explain and elucidate the mechanism behind atmospheric ageing of the organic aerosol. The experiments were conducted at the AIDA chamber facility of Karlsruhe Institute of Technology (KIT) in Karlsruhe and at the SAPHIR chamber of Forchungzentrum Jülich (FZJ) in Jülich. A fresh SOA was produced from ozonolysis of α-pinene or limonene and then aged by enhanced OH exposure. As an OH radical source in the AIDA-chamber the ozonolysis of tetramethylethylene (TME) was used while in the SAPHIR-chamber the OH was produced by natural light photochemistry. A general feature is that SOA produced from ozonolysis of α-pinene and limonene initially was rather volatile and becomes less volatile with time in the ozonolysis part of the experiment. Inducing OH chemistry or adding a new portion of precursors made the SOA more volatile due to addition of new semi-volatile material to the aged aerosol. The effect of OH chemistry was less pronounced in high concentration and low temperature experiments when lower relative amounts of semi-volatile material were available in the gas phase. Conclusions drawn from the changes in volatility were confirmed by comparison with the measured and modelled chemical composition of the aerosol phase. Three quantified products from the α-pinene oxidation; pinonic acid, pinic acid and methylbutanetricarboxylic acid (MBTCA) were used to probe the processes influencing aerosol volatility. A major conclusion from the work is that the OH induced ageing can be attributed to gas phase oxidation of products produced in the primary SOA formation process and that there was no indication on significant bulk or surface reactions. The presented results, thus, strongly emphasise the importance of gas phase oxidation of semi- or intermediate-volatile organic compounds (SVOC and IVOC) for atmospheric aerosol ageing.

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