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- W1569158244 abstract "The adsorption of alkylaromatic hydrocarbons (normal series: Me, Et,n-Pr, andn-Bu; α-methylated series; Me, Et,i-Pr andt-Bu) has been studied, with 20 wt% nickel supported on AlPO4, SiO2, and Al2O3 catalysts by using a gas-solid chromatographic technique. Isosteric adsorption heats at low (zero) coverage (ΔHadso), determined by measuring the retention volume of the adsorbate at different column temperatures, show that the adsorption process is exothermic (δHadso < 0). The Gibbs standard adsorption free energies (ΔGadso) and standard molar adsorption entropies (ΔSadso) are determined from the values of the Henry's law adsorption constants and show that the adsorption process is nonspontaneous (ΔGadso > 0) and that the alkylaromatic hydrocarbons lose vibrational and rotational freedom in their adsorption on the catalyst surface (ΔSadso < 0). In all cases the relative Henry's adsorption constants fit the Taft-Pavelich equation: log[(KΓ,p)i/(KΓ,p)0]=ρ*σ*+δEs." @default.
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- W1569158244 date "1987-06-01" @default.
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- W1569158244 title "AIPO4-supported nickel catalysts" @default.
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- W1569158244 doi "https://doi.org/10.1016/0021-9797(87)90392-4" @default.
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