Abstract
A presulfided NiW γ-Al 2O 3 catalyst was used to hydrogenate aromatic compounds contained in middle-distillate fractions of Alberta synthetic crudes, in a continuous-flow high-pressure reactor system. The study incorporates detailed compositional analyses of feedstocks and products performed using low-resolution mass spectrometry and 13C NMR. Experimental conditions were such that the effects of thermodynamic equilibria were covered. Differences in reactivity with respect to hydrogenation and cracking were observed for various aromatic species. These allowed comparison of the reaction kinetics and discussion of some mechanistic aspects of catalytic hydrogenation for complex mixtures of hydrocarbons which are not revealed by model compound studies.
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