The analysis of muonium hyperfine interaction measurements of thermal rate constants for addition reactions

1991 ◽  
Vol 94 (4) ◽  
pp. 2794-2806 ◽  
Author(s):  
Ronald J. Duchovic ◽  
Albert F. Wagner ◽  
Ralph Eric Turner ◽  
David M. Garner ◽  
Donald G. Fleming
Keyword(s):  
Hyperfine Interaction ◽  
Rate Constants ◽  
Addition Reactions ◽  
Thermal Rate Constants ◽  
Muonium Hyperfine ◽  
Rate Constants For Addition

Thermal rate constants for electron attachment to N2O: An example of endothermic attachment

2020 ◽  
Vol 153 (7) ◽  
pp. 074306
Author(s):  
Jordan C. Sawyer ◽  
Thomas M. Miller ◽  
Shaun G. Ard ◽  
Brendan C. Sweeny ◽  
Albert A. Viggiano ◽  
...  
Keyword(s):  
Rate Constants ◽  
Electron Attachment ◽  
Thermal Rate Constants

Development of a gas chromatograph-mass spectrometer with ‘on-line’ computer for studies in catalysis. Reactions of ethylene and deuterium on oxides

1974 ◽  
Vol 338 (1614) ◽  
pp. 299-310 ◽  
Keyword(s):  
Zinc Oxide ◽  
Heterogeneous Catalysis ◽  
Magnesium Oxide ◽  
Chromium Oxide ◽  
Rate Constants ◽  
High Selectivity ◽  
Addition Reactions ◽  
Gas Chromatograph ◽  
On Line ◽  
Catalytic Behaviour

The development of an ‘on-line’ computer for use with a combined gas chromatographymass spectroscopy (g.c.-m.s.) technique in the study of heterogeneous catalysis is described and discussed with reference to the reactions of ethylene and deuterium on oxides. Emphasis has been placed on the selectivities shown by a number of catalysts for the exchange and addition reactions. Magnesium oxide effects the exchange of ethylene without production of ethane even at 671 K; y-alumina also exhibits a high selectivity for exchange. In contrast, on chromium oxide (Cr20 3) at 197 K and zinc oxide at 273 K, ethylene undergoes rapid deuteration with no observable exchange of the olefin. For the range of catalysts studied the ratio of rate constants for the exchange and addition reactions decreases in the order: MgO > Al 2 O 3 > TiO 2 ~ Fe 2 O 3 > Co 3 O 4 > ZrO 2 > ZnO ~ Cr 2 O 3 . An explanation for the marked differences in catalytic behaviour within this group of oxides is provided.

A time-dependent method for computing thermal rate constants

1987 ◽  
Vol 134 (6) ◽  
pp. 531-535 ◽  
Author(s):  
Göran Wahnström ◽  
Horia Metiu
Keyword(s):  
Rate Constants ◽  
Time Dependent ◽  
Thermal Rate Constants
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