Publication Details
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I. Roy Choudhury, J. W. Thybaut, J. F.M. Denayer, J. A. Martens, G. B. Marin
 

Unpublished contribution to conference

Abstract 

A single-event microkinetic model has been developed for n-hexane hydroisomerization on Pt/H-ZSM-5 considering simultaneous effects of physisorption, diffusion and reaction. Shape selectivity is accounted for through the distinctive physisorption of linear and branched alkanes and multi-component diffusion. The diffusion phenomenona at the molecular level are translated to the crystallite scale and coupled with single-event microkinetics. The concentration dependence of the diffusion coefficients in the presence of acid sites is related to catalyst descriptors. The latter allow the quantitative description of the catalyst properties on the concentration profile on the crystallite scale and n-hexane conversion. The effect of the inter species correlation produces 2-3 mol% change on nhexane conversion and a second order effect is observed in the di-branched isomer distribution in particular through the thermodynamic factor while the effect of inter species diffusivity is negligible at the investigated operating conditions.

Reference 
 
 
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