Transport under reactive and non-reactive conditions during xylene gas phase isomerization on MFI is influenced by the coverage of the external surface. The rate determining pore entrance rate of xylenes correlates directly with the coverage of the transported molecules on the external surface. For mixtures of p- and m- or o-xylene, the transport rate is reduced by the competitive adsorption of m-xylene at the pore entrance. The higher adsorption constant of m-xylene and lower barrier to enter the pore reduces hindrance of the p-xylene adsorption rate with increasing temperatures.
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Transport under reactive and non-reactive conditions during xylene gas phase isomerization on MFI is influenced by the coverage of the external surface. The rate determining pore entrance rate of xylenes correlates directly with the coverage of the transported molecules on the external surface. For mixtures of p- and m- or o-xylene, the transport rate is reduced by the competitive adsorption of m-xylene at the pore entrance. The higher adsorption constant of m-xylene and lower barrier to enter t...
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