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Technical Briefs

Oxidative Activity of Hydrogen on Nickel and Inconel

[+] Author and Article Information
Kimberly N. Urness

Department of Mechanical Engineering,  University of Colorado at Boulder, Boulder, CO, 80309

G. Barney Ellison

Department of Chemistry and Biochemistry,  University of Colorado at Boulder, Boulder, CO, 80309

John W. Daily1

Department of Mechanical Engineering,  Center for Combustion and Environmental Research,  University of Colorado at Boulder, Boulder, CO, 80309John.Daily@colorado.edu

1

Corresponding author.

J. Eng. Gas Turbines Power 134(6), 064501 (Apr 12, 2012) (5 pages) doi:10.1115/1.4005985 History: Received August 02, 2011; Revised October 10, 2011; Published April 09, 2012; Online April 12, 2012

Experiments were carried out to determine whether nickel or Inconel are catalytically active for hydrogen oxidation. The work was motivated by the problem of flame flashback and/or inlet preignition in hydrogen-rich syngas fueled premixed/prevaporized gas turbine combustors. The experiments were performed using small resistively heated tubular reactors with matrix isolation/infrared diagnostics. Reactors were manufactured from stainless steel, nickel and Inconel. For the flow conditions studied, the conversion efficiency was about 3% for the nickel reactor and 0.9% for the Inconel reactor. No activity was seen for stainless steel. Comparison with a published surface kinetic reaction mechanism for nickel suggests that the surface oxidation rate of H2 in our reactors is about two orders of magnitude less than for specially prepared surfaces.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 1

Schematic view of the flow reactor/matrix infrared window arrangement

Grahic Jump Location
Figure 2

Percent conversion as a function of surface site density

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