Effect of Catalyst Diffusion Coefficient on Ethylbenzene Dehydrogenation

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Abstract:

The effective diffusion coefficients for a single catalyst pellet were determined by numerical integration of the Johnson-Stewart equation for bimodal and unimodal pore size distributions assuming a transitional diffusion regime. The effectiveness factors of a spherical catalyst pellet were determined at various pore size distribution probability density functions. Using effectiveness factors the production rates were determined. The results showed that the effectiveness factor and production rate are sensitive to catalyst pore size distribution and diffusion coefficient.

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Defect and Diffusion Forum (Volumes 312-315)

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1-6

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April 2011

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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[1] O. Shekhah: Styrene synthesis In situ characterization and reactivity measurement on un-promoted and potassium promoted iron oxide model catalysts. PhD thesis, Berlin (2004).

DOI: 10.1016/j.jcat.2004.03.024

Google Scholar

[2] E.H. Lee: Catal. Rev. -Sci. Eng. Vol. 8 (1973), p.285.

Google Scholar

[3] B. Davidson and M.J. Shah: IBM J. Res. Dev. Vol. 9 (1965), p.388.

Google Scholar

[4] H.W. Haynes: Catal. Rev. -Sci. Eng. Vol. 30 (4) (1988), p.563.

Google Scholar

[5] M.M. Mezedur, M. Kaviany and W. Moore: AIChE Vol. 48 (1) (2002), p.15.

Google Scholar

[6] J.M. Zalc, S.C. Reyes and E. Iglesia: Chem. Eng. Sci. Vol. 58 (2003), p.4605.

Google Scholar