scholarly journals Methanol dimer formation drastically enhances hydrogen abstraction from methanol by OH at low temperature

2016 ◽  
Vol 18 (32) ◽  
pp. 22712-22718 ◽  
Author(s):  
Willem Siebrand ◽  
Zorka Smedarchina ◽  
Emilio Martínez-Núñez ◽  
Antonio Fernández-Ramos
Keyword(s):  
Low Temperature ◽  
Hydroxyl Radicals ◽  
Kinetic Data ◽  
Hydrogen Abstraction ◽  
Dimer Formation ◽  
Cold Expansion ◽  
Kinetics Of

The kinetics of the reaction of methanol with hydroxyl radicals is revisited in light of reported new kinetic data, measured in cold expansion beams.

Kinetics of catalytic conversion of methanol at higher pressures

1980 ◽  
Vol 45 (12) ◽  
pp. 3402-3407 ◽  
Author(s):  
Jaroslav Bartoň ◽  
Vladimír Pour
Keyword(s):  
Low Temperature ◽  
Reaction Kinetics ◽  
Water Vapour ◽  
Kinetic Data ◽  
Catalytic Conversion ◽  
The Given ◽  
Kinetics Of

The course of the conversion of methanol with water vapour was followed on a low-temperature Cu-Zn-Cr-Al catalyst at pressures of 0.2 and 0.6 MPa. The kinetic data were evaluated together with those obtained at 0.1 MPa and the following equation for the reaction kinetics at the given conditions was derived: r = [p(CH3OH)p(H2O)]0.5[p(H2)]-1.3.

Theoretical Study of the Kinetics of the Hydrogen Abstraction from Methanol. 3. Reaction of Methanol with Hydrogen Atom, Methyl, and Hydroxyl Radicals

1999 ◽  
Vol 103 (19) ◽  
pp. 3750-3765 ◽  
Author(s):  
Jerzy T. Jodkowski ◽  
Marie-Thérèse Rayez ◽  
Jean-Claude Rayez ◽  
Tibor Bérces ◽  
Sándor Dóbé
Keyword(s):  
Hydrogen Atom ◽  
Hydroxyl Radicals ◽  
Theoretical Study ◽  
Hydrogen Abstraction ◽  
Kinetics Of

Kinetics of cyclohexene hydrogenation and of thiophene hydrogenolysis over cobalt-molybdenum catalysts of different composition

1979 ◽  
Vol 44 (12) ◽  
pp. 3676-3687 ◽  
Author(s):  
Vlastimil Vyskočil ◽  
Miloš Kraus
Keyword(s):  
Low Temperature ◽  
Rate Constants ◽  
Atmospheric Pressure ◽  
Kinetic Data ◽  
Oxygen Adsorption ◽  
Experimental Rate ◽  
Cyclohexene Hydrogenation ◽  
Molybdenum Catalysts ◽  
Kinetics Of

The kinetics of the title reactions has been measured at 350°C and atmospheric pressure on six Co-Mo-AL2O3 catalysts prepared by successive impregnation of the support with solutions of molybdenum and cobalt salts and containing these components in different ratios as well as on a commercial Cherox 36-00 catalyst. The activity of these catalysts depend strongly on their composition and showed similar trends for both reactions. Kinetic data were correlated by equations of Langmuir-Hishelwood type. Their adsorption coefficients have a similar value for different catalysts and all differences in the activity reflected in rate constants. Surface concentrations of molybdenum were determined by low temperature oxygen adsorption and were correlated with experimental rate constants.

Computational kinetics of the hydrogen abstraction reactions of n-propanol and iso-propanol by OH radical

2019 ◽  
Vol 21 (44) ◽  
pp. 24458-24468
Author(s):  
Xuan Guo ◽  
Rui Ming Zhang ◽  
Lu Gem Gao ◽  
Xin Zhang ◽  
Xuefei Xu
Keyword(s):  
Low Temperature ◽  
Temperature Regime ◽  
Reaction Rate ◽  
Hydrogen Abstraction ◽  
Capture Rate ◽  
Oh Radical ◽  
Negative Dependence ◽  
Reaction Rate Constants ◽  
Reactive Complex ◽  
Kinetics Of

The total reaction rate constants show a significant negative dependence on temperature in the low temperature regime and approach the capture rate for the formation of the pre-reactive complex when temperature is down to the ultracold regime.

scholarly journals Comment on “Methanol dimer formation drastically enhances hydrogen abstraction from methanol by OH at low temperature” by W. Siebrand, Z. Smedarchina, E. Martínez-Núñez and A. Fernández-Ramos, Phys. Chem. Chem. Phys., 2016, 18, 22712

2018 ◽  
Vol 20 (12) ◽  
pp. 8349-8354 ◽  
Author(s):  
R. J. Shannon ◽  
J. C. Gómez Martín ◽  
R. L. Caravan ◽  
M. A. Blitz ◽  
J. M. C. Plane ◽  
...  
Keyword(s):  
Low Temperature ◽  
Low Temperatures ◽  
Laval Nozzle ◽  
Hydrogen Abstraction ◽  
Chem Phys ◽  
Dimer Formation ◽  
Kinetics Studies ◽  
Phys Chem Chem Phys

A low fraction of methanol dimers is formed in the Laval nozzle used for kinetics studies at very low temperatures.

Oxidation Kinetics of Ge+-Ion Implanted Si

1987 ◽  
Vol 105 ◽  
Author(s):  
O. W. Holland ◽  
C. W. White ◽  
D. Fathy
Keyword(s):  
Activation Energy ◽  
Low Temperature ◽  
Oxidation Kinetics ◽  
Kinetic Data ◽  
Anomalous Behavior ◽  
Steam Oxidation ◽  
Oxidation Rates ◽  
Kinetics Of ◽  
Ion Implanted

AbstractKinetic data are provided for oxidation of Ge+-ion implanted Si over a range of temperature and oxidation ambient. Oxidation rates were enhanced in implanted Si and, over most of the range studied, found to be consistent with a modified reaction at the oxide/Si interface. However, this reaction is shown to be more complex than in virgin Si and could not be represented by a single activation energy. An anomalous behavior is exhibited at low-temperature for steam oxidation. This behavior is characterized and the mechanisms which are responsible are discussed.

Kinetics of Various 99mTc-Sn-Pyrophosphate Compounds in the Rat

1977 ◽  
Vol 16 (03) ◽  
pp. 100-103 ◽  
Author(s):  
C. Schümichen ◽  
J. Waiden ◽  
G. Hoffmann
Keyword(s):  
Glomerular Filtration ◽  
Renal Clearance ◽  
Plasma Protein ◽  
Kinetic Data ◽  
Adult Rats ◽  
Compound A ◽  
Extravascular Space ◽  
Tubular Cells ◽  
Glomerular Filtrate ◽  
Kinetics Of

SummaryThe kinetic data of two different 99mTc-Sn-pyrophosphate compounds (compound A and B) were evaluated in non-adult rats. Only compound A concentrated in bone. Both compounds dispersed rapidly in the intravascular as well as the extravascular space. The plasma protein bond of both compounds increased with time after injection and impaired both the renal clearance of both compounds and the bone clearance of compound A. The renal clearance of both compounds was somewhat above that of 5 1Cr-EDTA. It is concluded that compound A and B is mainly excreted by glomerular filtration. About one fourth of the glomerular filtrate of compound B is reabsorbed and accumulated by the tubular cells.

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