Catalytic Ignition Properties and Surface Reaction Kinetics Modeling From Methane in Oxygen-Nitrogen Mixtures on Platinum

2012 ◽  
Author(s):  
Duane Elgan ◽  
Judi Steciak ◽  
Ralph Budwig ◽  
Steve Beyerlein
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Reaction Kinetics ◽  
Surface Reaction ◽  
Flow Reactor ◽  
Platinum Catalyst ◽  
Flow Simulation ◽  
Transfer Model ◽  
Measurement Capability ◽  
Surface Reaction Kinetics

The ignition temperature and heat generation from oxidation of methane on a platinum catalyst were determined experimentally. A 127 micron diameter platinum coiled wire was placed crosswise in a quartz tube of a plug flow reactor. A source meter with a 4-wire measurement capability measured the resistance and current to calculate the average temperature of the surface reaction. Light-off temperatures varied from 730–780K for methane for a fuel-oxygen equivalence ratio of 0.3 to 1.0 at fuel percentages of 2–5% by volume. A model of the experimental system was created using Fluent coupled with Chemkin to combine an advanced chemistry solver with flow simulation. The experimental data was compared to the model results, which includes heat transfer and the surface reaction kinetics of methane on platinum. The heat transfer model obtained values within 4 Kelvin to experimental data for temperatures between 400K and 700K. At temperatures greater than 700K the model deviated with temperatures greater than the experimental by up to 60 Kelvin.

Laser-induced thermal desorption studies of surface reaction kinetics

1991 ◽  
Author(s):  
Steven M. George ◽  
Peter A. Coon ◽  
P. Gupta ◽  
M. L. Wise
Keyword(s):  
Reaction Kinetics ◽  
Thermal Desorption ◽  
Surface Reaction ◽  
Surface Reaction Kinetics

Surface reaction kinetics of Ga1−xInxP growth during pulsed chemical beam epitaxy

2001 ◽  
Vol 178 (1-4) ◽  
pp. 63-74
Author(s):  
N. Dietz ◽  
S.C. Beeler ◽  
J.W. Schmidt ◽  
H.T. Tran
Keyword(s):  
Reaction Kinetics ◽  
Surface Reaction ◽  
Chemical Beam Epitaxy ◽  
Surface Reaction Kinetics ◽  
Kinetics Of

Experimental Investigation of Heat Transfer in Impingement Air Cooled Plate Fin Heat Sinks

2005 ◽  
Vol 128 (4) ◽  
pp. 412-418 ◽  
Author(s):  
Zhipeng Duan ◽  
Y. S. Muzychka
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Thermal Resistance ◽  
Thermal Performance ◽  
Heat Transfer Model ◽  
Heat Sinks ◽  
Transfer Model ◽  
Transfer Coefficients ◽  
Developing Flow ◽  
Rectangular Channels

Impingement cooling of plate fin heat sinks is examined. Experimental measurements of thermal performance were performed with four heat sinks of various impingement inlet widths, fin spacings, fin heights, and airflow velocities. The percent uncertainty in the measured thermal resistance was a maximum of 2.6% in the validation tests. Using a simple thermal resistance model based on developing laminar flow in rectangular channels, the actual mean heat transfer coefficients are obtained in order to develop a simple heat transfer model for the impingement plate fin heat sink system. The experimental results are combined into a dimensionless correlation for channel average Nusselt number Nu∼f(L*,Pr). We use a dimensionless thermal developing flow length, L*=(L∕2)∕(DhRePr), as the independent parameter. Results show that Nu∼1∕L*, similar to developing flow in parallel channels. The heat transfer model covers the practical operating range of most heat sinks, 0.01<L*<0.18. The accuracy of the heat transfer model was found to be within 11% of the experimental data taken on four heat sinks and other experimental data from the published literature at channel Reynolds numbers less than 1200. The proposed heat transfer model may be used to predict the thermal performance of impingement air cooled plate fin heat sinks for design purposes.

Non-linear Surface Reaction Kinetics of GaAs MOVPE Explored by Selective Area Growth

2019 ◽  
Vol 2 (7) ◽  
pp. 145-156
Author(s):  
Haizheng Song ◽  
M. Sugiyama ◽  
Yoshiaki Nakano ◽  
Yukihiro Shimogaki
Keyword(s):  
Reaction Kinetics ◽  
Surface Reaction ◽  
Selective Area Growth ◽  
Selective Area ◽  
Area Growth ◽  
Non Linear ◽  
Surface Reaction Kinetics ◽  
Kinetics Of

scholarly journals Adjoint-based sensitivity analysis of char combustion surface reaction kinetics

Fuel ◽  
2021 ◽  
Vol 287 ◽  
pp. 119503
Author(s):  
Ahmed Hassan ◽  
Taraneh Sayadi ◽  
Martin Schiemann ◽  
Viktor Scherer
Keyword(s):  
Sensitivity Analysis ◽  
Reaction Kinetics ◽  
Surface Reaction ◽  
Combustion Surface ◽  
Char Combustion ◽  
Surface Reaction Kinetics
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