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The chaotic and random porosity of typical catalyst particles continues to present a challenge of quantification. An analysis is presented of the variation of diffusion and reaction performance with catalyst porosity architecture. The analysis uses simple 2D pore networks with O(10 3 ) pores. The impact of different pore assemblies is assessed for the special case of a bimodal distribution...
Catalyst deactivation by foulant deposition arises from interactions of the accumulating deposit with the geometry and void structure of particle porosity. Simple approaches involving a wedge-layering deposition in a parallel bundle of pores allow activity loss by surface coverage and pore plugging. More complex models use coking rates related to local concentration in bundles of randomly corrugated...
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