"Temperature and composition were measured at various locations in a system where ethylene is hydrogenated to ethane on a 1/4 inch porous catalyst wedge made of nickel supported on alumina. 'When the wedge of catalyst was bathed in hydrogen, experimental results indicated a high temperature rise from the feed temperature to the catalyst which is implied by the diffusion controlled regime for solid catalyzed, highly exothermic reactions. This high activity was reversibly reduced by bathing the catalyst wedge in nitrogen for extended time periods (greater than 24 hours). This nitrogen soaking changed the experimental conditions from those of diffusion controlled kinetics to those typically exhibited by systems in the kinetic regime.
The experimental system was simulated numerically for a variety of boundary conditions using reasonable assumptions and physical property data for this reaction system. Heat and mass transfer coefficients were allowed to vary along the wedge according to boundary layer theory results. For the internal wedge temperatures predicted by the model to agree within 1% of those measured experimentally, it was necessary to consider finite heat transfer at the stagnation point which is contrary to the classical boundary layer theory commonly applied to flat plate and wedge flows. It was also necessary to allow modest (~6% or less) heat loss from the back edge of the wedge"--Abstract, page ii.
Crosser, Orrin K.
Robertson, B. Ken
Johnson, James W., 1930-2002
Zakin, J. L.
Roach, D. Vincent
Chemical and Biochemical Engineering
Ph. D. in Chemical Engineering
University of Missouri--Rolla
viii, 137 pages
© 1974 Joseph Michael Schardl, Jr., All rights reserved.
Dissertation - Restricted Access
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Link to Catalog RecordElectronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library. http://laurel.lso.missouri.edu/record=b1067300~S5
Schardl, Joseph Michael Jr., "A study of exothermic chemical reaction in a porous catalyst wedge" (1974). Doctoral Dissertations. 313.