Kinetics of the carburization of iron alloys in methane-hydrogen mixtures and of the decarburization in hydrogen

1985 ◽  
Vol 56 (5) ◽  
pp. 275-282 ◽  
Author(s):  
Hans Jürgen Grabke ◽  
Else Marie Müller ◽  
Heinz Valentin Speck ◽  
Geza Konczos
Keyword(s):  
Iron Alloys ◽  
Hydrogen Mixtures ◽  
Kinetics Of

Kinetics of pyrolysis of octane in argonhydrogen mixtures

1983 ◽  
Vol 50 ◽  
pp. 29-39 ◽  
Author(s):  
K.R. Doolan ◽  
J.C. Mackie
Keyword(s):  
Hydrogen Mixtures ◽  
Kinetics Of

Reaction Kinetics of Iodine and Cesium in Steam/Hydrogen Mixtures

1988 ◽  
Vol 81 (3) ◽  
pp. 347-359 ◽  
Author(s):  
August W. Cronenberg ◽  
Daniel J. Osetek
Keyword(s):  
Reaction Kinetics ◽  
Hydrogen Mixtures ◽  
Kinetics Of

Numerical Simulation of Gas Phase Reaction Chemistry in Methane-Hydrogen Mixtures

2003 ◽  
Author(s):  
R. K. Garg ◽  
J. P. Gore ◽  
T. S. Fisher
Keyword(s):  
Gas Phase ◽  
Energy Deposition ◽  
Synthesis Process ◽  
Phase Reaction ◽  
Gas Phase Reactions ◽  
Gas Phase Kinetics ◽  
Hydrogen Mixtures ◽  
Kinetics Of ◽  
Energy Deposition Rate ◽  
Reactor Pressure

In the present work, gas-phase reactions between opposing streams of mixtures of hydrogen (H2) and methane (CH4) in the presence of volumetric energy input were simulated. The goal of the simulations is to estimate the concentrations of precursors responsible for the formation of carbon nanotubes (CNTs). These estimates are expected to help in understanding fundamental mechanisms of CNT formation and in controlling the synthesis process through parameters such as inlet composition and temperature, reactor pressure and absorbed energy. The simulation employs gas-phase kinetics of the GRI-2.11 mechanism with only reactions involving molecules that contain C and H atoms. The results indicate that the concentrations of H radicals, C2H2 and C atoms increase significantly with increases in volumetric energy deposition rate beyond a threshold.

Numerical Simulation of Hydrocarbon-Hydrogen Reaction Chemistry in a CVD Reactor

2003 ◽  
Author(s):  
R. K. Garg ◽  
J. P. Gore ◽  
T. S. Fisher
Keyword(s):  
Gas Phase ◽  
Energy Deposition ◽  
Chemical Vapor ◽  
Synthesis Process ◽  
Gas Phase Reactions ◽  
Gas Phase Kinetics ◽  
Hydrogen Mixtures ◽  
Kinetics Of ◽  
Energy Deposition Rate ◽  
Reactor Pressure

In the present work, gas-phase reactions for three different hydrocarbon-hydrogen mixtures (CH4+H2, C2H2+H2 and C2H4+H2) in the presence of volumetric energy input were simulated in a chemical vapor deposition (CVD) reactor. The goal of the simulations is to estimate the concentrations of species responsible for the formation of carbon nanotubes (CNTs). These estimates are expected to aid in understanding fundamental mechanisms of CNT formation and in controlling the synthesis process through process parameters such as inlet composition and temperature of the mixture, reactor pressure and microwave power. The simulation employs gas-phase kinetics of the GRI-2.11 mechanism with only reactions involving neutral molecules that contain C and H atoms. The results indicate that the concentrations of H radicals and C atoms increase with increases in energy deposition rate.

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