Steam/CO2Reforming of Methane. Carbon Filament Formation by the Boudouard Reaction and Gasification by CO2, by H2, and by Steam: Kinetic Study

2002 ◽  
Vol 41 (17) ◽  
pp. 4252-4265 ◽  
Author(s):  
J.-W. Snoeck ◽  
G. F. Froment ◽  
M. Fowles
Keyword(s):  
Kinetic Study ◽  
Boudouard Reaction ◽  
Filament Formation ◽  
Carbon Filament ◽  
Methane Carbon

Dynamics and Mechanism of Carbon Filament Formation during Methane Reforming on Supported Nickel Clusters

2020 ◽  
Vol 124 (37) ◽  
pp. 20143-20160
Author(s):  
Samuel L. Leung ◽  
Junmei Wei ◽  
William L. Holstein ◽  
Miguel Avalos-Borja ◽  
Enrique Iglesia
Keyword(s):  
Methane Reforming ◽  
Filament Formation ◽  
Carbon Filament ◽  
Nickel Clusters

Studies of the reactions of hydroxyl radicals. I

1966 ◽  
Vol 291 (1424) ◽  
pp. 73-84 ◽  
Keyword(s):  
Hydrogen Peroxide ◽  
Carbon Monoxide ◽  
Kinetic Study ◽  
Hydroxyl Radicals ◽  
Rate Constants ◽  
The Other ◽  
General Applicability ◽  
Preliminary Account ◽  
Homogeneous Decomposition ◽  
Methane Carbon

This paper describes how the homogeneous decomposition of hydrogen peroxide vapour has been successfully used as a source of hydroxyl radicals in a kinetic study of the relative rates of reaction of hydroxyl radicals with methane, carbon monoxide, formaldehyde and hydrogen peroxide. It has been found that the method is of general applicability provided subsequent reactions of radicals formed can be controlled. With hydroxyl radicals so produced from the decomposition of hydrogen peroxide, surprisingly consistent values were obtained for the relative rates of reaction of methane and carbon monoxide with hydroxyl radicals. Thus, within an accuracy of 10%, the ratios of rate constants for reaction of hydroxyl radicals with methane and carbon monoxide were found to be 3.6 at 650 °C, 2.1 at 525 °C and 0.85 at 400 °C. The rates of reaction of hydroxyl radicals with formaldehyde and hydrogen peroxide were less accurately determined because of expected additional reactions. Within an accuracy of about 50% it was estimated that hydroxyl radicals reacted ten times as fast with hydrogen peroxide as with carbon monoxide at 525 °C. At the same temperature hydroxyl radicals reacted 33 ± 6 times as fast with formaldehyde as with methane. Data were obtainable at temperatures as low as 400 °C even though heterogeneous decomposition of hydrogen peroxide was relatively more important at these temperatures. This was because heterogeneous decomposition of hydrogen peroxide did not cause oxida­tion of the other gases which were also present. A preliminary account (Hoare 1962) of this work has previously been published.

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