Evaluation of the Effect of Catalyst Pore-Size Distribution on the Effectiveness Factor in Ethylbenzene Dehydrogenation by Orthogonal Collocation

Mohammad Ebrahim Zeynali

doi:10.4028/www.scientific.net/DDF.316-317.155

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Evaluation of the Effect of Catalyst Pore-Size Distribution on the Effectiveness Factor in Ethylbenzene Dehydrogenation by Orthogonal Collocation
p.155

HomeDefect and Diffusion ForumDefect and Diffusion Forum Vols. 316-317Evaluation of the Effect of Catalyst Pore-Size...

Evaluation of the Effect of Catalyst Pore-Size Distribution on the Effectiveness Factor in Ethylbenzene Dehydrogenation by Orthogonal Collocation

Abstract:

The mathematical model for multicomponent diffusion in styrene production is given considering all six reactions involved in styrene production. The diffusion coefficients for catalyst pellet are calculated for unimodal and bimodal pore size distributions using trapezoidal rule of integration. The effects of standard deviation and average pore size on the diffusion coefficient are determined. The differential equations are converted to algebraic equations and solved by the orthogonal collocation method. The effectiveness factor of catalyst pellet in styrene production is calculated for various pore sizes. It is seen that the average pore size and pore size distribution affects the production rate and effectiveness factor significantly.

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Periodical:

Defect and Diffusion Forum (Volumes 316-317)

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155-169

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.316-317.155

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Online since:

May 2011

Authors:

Mohammad Ebrahim Zeynali

Keywords:

Catalyst Pore Size, Diffusion Coefficient, Effectiveness Factor, Ethylbenzene, Orthogonal Collocation

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References

[1] Davidson, B. and Shah, M. J., Simulation of the Catalytic Cracking Process for Styrene Production, IBM Journal, (1965) 388.

Google Scholar

[2] Elnashaie S. S. E. H., and Elshishini S. S., Modeling, Simulation and Optimization of Industrial Fixed Bed Catalytic Reactors, Gordon and Breach, Amsterdam, (1993).

DOI: 10.1201/9780203746769

Google Scholar

[3] Finlayson, B. A., Nonlinear Analysis in Chemical Engineering, McGraw-Hill, New York, (1980).

Google Scholar

[4] Rice, R., G, and Do, D. D., Applied Mathematics and Modeling for Chemical Engineers, John Wiley & Sons, New York, (1994).

Google Scholar

[5] Lin, L. Numerical Simulation of Pressure Swing Adsorption Process, Masters Thesis, Simon Fraser Univ. (1997).

Google Scholar

[6] Villadsen J. V., and Stewart, W. E., Solution of Boundary-Value Problems by Orthogonal Collocation, Chemical Engineering Science, 22 (1967) 1483.

DOI: 10.1016/0009-2509(67)80074-5

Google Scholar