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Research Papers

Experimental and Numerical Evaluation of the Bypass Flow in a Catalytic Plate Reactor for Hydrogen Production

[+] Author and Article Information
Haftor O. Sigurdsson1

Søren K. Kær

Department of Energy Technology,  Aalborg University, Pontoppidanstrde 101, 9220 Aalborg, Denmark

1

Corresponding author.

J. Fuel Cell Sci. Technol 9(2), 021016 (Mar 19, 2012) (7 pages) doi:10.1115/1.4005630 History: Received October 06, 2011; Accepted November 30, 2011; Published March 12, 2012; Online March 19, 2012

Numerical and experimental study is performed to evaluate the reactant bypass flow in a catalytic plate reactor with a coated wire mesh catalyst for steam reforming of methane for hydrogen generation. Bypass of unconverted methane is evaluated under different wire mesh catalyst width to reactor duct width ratios, the results show that altering this ratio from 0.98 to 0.96 results in an increase in bypass mass flow of 22%. Effect of catalytic wire mesh flow resistance on bypass flow has also been investigated and results show increased bypass flow as catalytic wire mesh flow resistance increases. The numerical results are in good agreement with experimental data. The study improves the understanding of the underlying transport phenomena in these reactors and shows that the flow maldistribution in a catalytic plate reactor using a coated wire mesh has to be considered.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 4

Geometrical description of the channel and wire mesh

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Figure 5

Pressure drop as a function of mass flow rate for different α ratios where β = 0.955

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Figure 6

Pressure drop as a function of mass flow rate for different β ratios where α = 1.000

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Figure 7

Pressure drop as a function of mass flow rate for different β ratios where α = 0.956

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Figure 8

The 3D CFD model is made up of 4 domains: inlet, wire mesh, bypass channel, and outlet

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Figure 9

Comparing experimental pressure drop with pressure drop in the numerical model at various α ratios

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Figure 3

Schematic of the experimental test section

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Figure 2

Test section assembly in the AAU laboratory

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Figure 1

Differential static pressure was measured between five tabs over the wire mesh

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Figure 13

Velocity vectors when α = 0.956 and β = 1.000 (a), β = 0955 (b), β = 0890 (c), and β = 0.833 (d).

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Figure 10

Mass flow (a) and velocity (b) in wire mesh and bypass channel domains at different α ratios where β = 0.955

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Figure 11

Mass flow (a) and velocity (b) in wire mesh and bypass channel domains at different β ratios where α = 0.956

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Figure 12

Velocity vectors when β = 0955 and α = 1.000 (a), α = 0.989 (b), α = 0.978 (c), and α = 0.956 (d)

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