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- W2031031867 abstract "The conversion of toluene in toluene disproportionation and its alkylation with ethylene over metallosilicates (AI, Fe, In) of the MFI structure has been found to be proportional to the concentration of the individual framework bridging SiOHM groups, and when related to one SiOHM site, it increases in the sequence of the isomorphous substitution of Si for In < Fe <AI. This clearly reflects the increasing acid strength of the SiOHM group from In, Fe, to AI. As the alkylation of toluene with isopropanol is controlled by the desorption/transport rate of the bulky propyltoluenes from the molecular sieve channels, no correlation between the molecular sieve acidity and conversion- selectivity for this reaction has been found. All metallosilicates (AI, Fe, In) exhibit para-shape selectivity; however, no definite conclusion on the effect of the acidity on the para-shape selectivity can be drawn. Although the AI-silicates contain SiOHM sites with the highest acid strength, the deactivation of Fe and In-silicates by coking is greater compared to AI analogs, likely due to the higher relative amount of extraframework metal species." @default.
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- W2031031867 date "1994-02-01" @default.
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- W2031031867 title "The effect of AI, Fe, and in substitution in the MFI silicate structure on the aromatic hydrocarbon transformation: SiOHM site strength" @default.
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- W2031031867 doi "https://doi.org/10.1016/0144-2449(94)90009-4" @default.
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