Gas-Phase Kinetics of the Self Reactions of the Radicals CH2F and CHF2

2000 ◽  
Vol 214 (5) ◽  
Author(s):  
T. Beiderhase ◽  
Walter Hack ◽  
Karlheinz Hoyermann ◽  
Matthias Olzmann
Keyword(s):  
Gas Phase ◽  
Molecular Beam ◽  
Rate Coefficient ◽  
Flow Reactor ◽  
Main Channel ◽  
Low Energy ◽  
The Self ◽  
Gas Phase Kinetics ◽  
Low Energy Electron ◽  
Kinetics Of

Fluorinated hydrocarbon radical-radical reactions in the gas phase have been studied at low pressure (0.5 ≤ p/mbar ≤ 2) and low temperature (253 ≤ T/K ≤ 333) using the discharge flow reactor molecular beam sampling mass spectrometry (MS) technique. Stable and labile species have been detected by MS applying low energy electron impact as well as multiphoton ionisation.For the combination reactionCHthe rate coefficient kCHis the main channel (k(1b)/kFor the CHFCHFthe rate coefficient was measured as kNo pressure dependence of k

Kinetics of low energy electron attachment to some fluorinated alcohols in the gas phase

2014 ◽  
Vol 591 ◽  
pp. 282-286 ◽  
Author(s):  
K. Wnorowski ◽  
J. Wnorowska ◽  
J. Kopyra ◽  
B. Michalczuk ◽  
I. Szamrej ◽  
...  
Keyword(s):  
Gas Phase ◽  
Electron Attachment ◽  
Low Energy ◽  
Energy Electron ◽  
Fluorinated Alcohols ◽  
Low Energy Electron ◽  
Kinetics Of

scholarly journals Gas-phase kinetics of CH3CHO with OH radicals between 11.7 and 177.5 K

2020 ◽  
Vol 22 (36) ◽  
pp. 20562-20572
Author(s):  
Sergio Blázquez ◽  
Daniel González ◽  
Elias M. Neeman ◽  
Bernabé Ballesteros ◽  
Marcelino Agúndez ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Gas Phase ◽  
Rate Coefficient ◽  
Oh Radicals ◽  
Gas Phase Kinetics ◽  
Ultralow Temperatures ◽  
Kinetics Of

Temperature dependence of the rate coefficient for the OH + CH3CHO reaction at ultralow temperatures (11.7–177.5 K): first measurements below 60 K.

New Insights into the Kinetics of the Gas-Phase Oxidation of Hexafluoropropene

2016 ◽  
Vol 41 (4) ◽  
pp. 418-427 ◽  
Author(s):  
David Lokhat ◽  
Maciej Starzak ◽  
Deresh Ramjugernath
Keyword(s):  
Gas Phase ◽  
Oxidation Process ◽  
Flow Reactor ◽  
Packed Column ◽  
Phase Reaction ◽  
Analytical Technique ◽  
Tubular Flow Reactor ◽  
Gas Phase Oxidation ◽  
Tubular Flow ◽  
Kinetics Of

The gas-phase reaction of hexafluoropropene and molecular oxygen was investigated in a tubular flow reactor at 450 kPa and within a temperature range of 463–493 K using HFP/O2 mixtures containing 20–67% HFP on a molar basis. Capillary and packed column chromatography served as the main analytical technique. The reaction yielded HFPO, COF2, CF3COF, C2F4 and c-C3F6 as gas-phase products. High molecular weight oligomers were also formed. The oligomers were found to have a polyoxadifluoromethylene structure according to elemental and 19F NMR analysis. At 493 K HFP is proposed to undergo oxygen-mediated decomposition to difluorocarbene radicals, yielding greater quantities of difluorocarbene recombination products. Kinetic parameters for a revised model of the oxidation process were identified through least squares analysis of the experimental data.

scholarly journals Pressure dependent low temperature kinetics for CN + CH3CN: competition between chemical reaction and van der Waals complex formation

2016 ◽  
Vol 18 (22) ◽  
pp. 15118-15132 ◽  
Author(s):  
Chantal Sleiman ◽  
Sergio González ◽  
Stephen J. Klippenstein ◽  
Dahbia Talbi ◽  
Gisèle El Dib ◽  
...  
Keyword(s):  
Low Temperature ◽  
Complex Formation ◽  
Gas Phase ◽  
Rate Coefficient ◽  
Flow Reactor ◽  
Slow Flow ◽  
Phase Reaction ◽  
Gas Phase Reaction ◽  
Low Temperature Kinetics ◽  
Temperature And Pressure

The gas phase reaction between the CN radical and acetonitrile CH3CN was investigated experimentally with a CRESU apparatus and a slow flow reactor as well as theoretically to explore the temperature and pressure dependence of its rate coefficient from 354 K down to 23 K.

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