Degradation mechanism of 2-fluoropropene by Cl atoms: experimental and theoretical products distribution studies

2021 ◽  
Author(s):  
Cynthia Rivela ◽  
Alejandro L. Cardona ◽  
Maria B Blanco ◽  
Ian Barnes ◽  
Martina Kieninger ◽  
...  
Keyword(s):  
Gas Phase ◽  
Quartz Glass ◽  
Atmospheric Pressure ◽  
Degradation Mechanism ◽  
Phase Reaction ◽  
Reaction Products ◽  
Gas Phase Reaction ◽  
Distribution Studies ◽  
First Time ◽  
Cl Atoms

The gas-phase reaction products of 2-fluoropropene (2FP) with Cl atoms has been determined for the first time at 298 K and atmospheric pressure using a 1080 L quartz-glass photoreactor coupled...

Hydrogenation of CO2 over 15% Fe/SiO2 Catalyst under Sub- and Supercritical Conditions

2018 ◽  
Vol 18 (4) ◽  
pp. 57-63
Author(s):  
N. D. Evdokimenko ◽  
K. O. Kim ◽  
G. I. Kapustin ◽  
N. A. Davshan ◽  
A. L. Kustov
Keyword(s):  
Gas Phase ◽  
Atmospheric Pressure ◽  
Iron Nanoparticles ◽  
Catalyst Surface ◽  
Phase Reaction ◽  
Supercritical Conditions ◽  
Gas Phase Reaction ◽  
Xrd Studies ◽  
First Time ◽  
Hydrogenation Of Co

The results of comparative studies of CO2hydrogenation over 15% Fe/SiO2catalyst under sub- and supercritical conditions are presented for the first time. The reaction was studied at 300–500 °C and atmospheric pressure in gas phase and at 95 atm under supercritical conditions. The molar H2: CO2ratio was 2 : 1. Under supercritical conditions, the selectivity to CO2decreased from 90–95 to 30–50 % at all temperatures, while the selectivity to hydrocarbons increased up to 60 %. The reaction under supercritical conditions, unlike gas-phase hydrogenation, produced alcohols. TG-DTG-DTA techniques were used to demonstrate 2.2-fold decrease in the quantity of carbon-like deposits in comparison to that in the gas-phase reaction. XRD studies revealed the formation of graphite-like species on the catalyst surface under gas-phase but not supercritical conditions. The developed process and catalyst for hydrogenation of CO2can be recommended to be further modified in order to improve the catalyst based on iron nanoparticles that is as expensive as 0.1–0.01 of the known catalysts for CO2hydrogenation.

scholarly journals Atmospheric degradation of 3-methylfuran: kinetic and products study

2011 ◽  
Vol 11 (7) ◽  
pp. 3227-3241 ◽  
Author(s):  
A. Tapia ◽  
F. Villanueva ◽  
M. S. Salgado ◽  
B. Cabañas ◽  
E. Martínez ◽  
...  
Keyword(s):  
Gas Phase ◽  
Aromatic Ring ◽  
Atmospheric Pressure ◽  
Ring Opening ◽  
Room Temperature ◽  
Rate Coefficients ◽  
Main Reaction ◽  
Phase Reaction ◽  
Reaction Products ◽  
Cl Atoms

Abstract. A study of the kinetics and products obtained from the reactions of 3-methylfuran with the main atmospheric oxidants has been performed. The rate coefficients for the gas-phase reaction of 3-methylfuran with OH and NO3 radicals have been determined at room temperature and atmospheric pressure (air and N2 as bath gases), using a relative method with different experimental techniques. The rate coefficients obtained for these reactions were (in units cm3 molecule−1 s−1) kOH = (1.13 ± 0.22) × 10−10 and kNO3 = (1.26 ± 0.18) × 10−11. Products from the reaction of 3-methylfuran with OH, NO3 and Cl atoms in the absence and in the presence of NO have also been determined. The main reaction products obtained were chlorinated methylfuranones and hydroxy-methylfuranones in the reaction of 3-methylfuran with Cl atoms, 2-methylbutenedial, 3-methyl-2,5-furanodione and hydroxy-methylfuranones in the reaction of 3-methylfuran with OH and NO3 radicals and also nitrated compounds in the reaction with NO3 radicals. The results indicate that, in all cases, the main reaction path is the addition to the double bond of the aromatic ring followed by ring opening in the case of OH and NO3 radicals. The formation of 3-furaldehyde and hydroxy-methylfuranones (in the reactions of 3-methylfuran with Cl atoms and NO3 radicals) confirmed the H-atom abstraction from the methyl group and from the aromatic ring, respectively. This study represents the first product determination for Cl atoms and NO3 radicals in reactions with 3-methylfuran. The reaction mechanisms and atmospheric implications of the reactions under consideration are also discussed.

Gas phase reaction of Cl atoms with a series of oxygenated organic species at 295 K

1988 ◽  
Vol 20 (11) ◽  
pp. 867-875 ◽  
Author(s):  
Timothy J. Wallington ◽  
Loretta M. Skewes ◽  
Walter O. Siegl ◽  
Ching-Hsong Wu ◽  
Steven M. Japar
Keyword(s):  
Gas Phase ◽  
Phase Reaction ◽  
Gas Phase Reaction ◽  
Organic Species ◽  
Cl Atoms

Optimization of C1-Oxygenates for the Selective Oxidation of Methane in a Gas-Phase Reaction of CH4−O2−NO at Atmospheric Pressure

2001 ◽  
Vol 15 (1) ◽  
pp. 44-51 ◽  
Author(s):  
Tetsuya Takemoto ◽  
Kenji Tabata ◽  
Yonghong Teng ◽  
Shuiliang Yao ◽  
Akira Nakayama ◽  
...  
Keyword(s):  
Gas Phase ◽  
Selective Oxidation ◽  
Atmospheric Pressure ◽  
Phase Reaction ◽  
Gas Phase Reaction ◽  
Oxidation Of Methane

scholarly journals Gas-phase reaction products and yields of terpinolene with ozone and nitric oxide using a new derivatization agent

2015 ◽  
Vol 122 ◽  
pp. 513-520 ◽  
Author(s):  
Jason E. Ham ◽  
Stephen R. Jackson ◽  
Joel C. Harrison ◽  
J.R. Wells
Keyword(s):  
Nitric Oxide ◽  
Gas Phase ◽  
Phase Reaction ◽  
Reaction Products ◽  
Gas Phase Reaction

Gas-phase reaction of CeVO5+ cluster ions with C2H4: the reactivity of cluster bonded peroxides

2015 ◽  
Vol 44 (7) ◽  
pp. 3128-3135 ◽  
Author(s):  
Jia-Bi Ma ◽  
Jing-Heng Meng ◽  
Sheng-Gui He
Keyword(s):  
Electronic Structure ◽  
Gas Phase ◽  
Closed Shell ◽  
Cluster Ions ◽  
Phase Reaction ◽  
Gas Phase Reaction ◽  
Metal Oxide Clusters ◽  
Transition Metal Oxide Clusters ◽  
Hydrocarbon Molecules ◽  
First Time

The reactivity of the peroxide unit with hydrocarbon molecules on transition metal oxide clusters with a closed-shell electronic structure has been identified for the first time.

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