Journal
APPLIED CATALYSIS A-GENERAL
Volume 242, Issue 2, Pages 311-320Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0926-860X(02)00521-5
Keywords
hydrodenitrogenation (HDN); hydrotreatment (HDT); hydrogenation; inhibition; reaction kinetics; dibenzothiophene; nitrogen compounds; indole; o-ethylaniline
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An unexpected self-inhibiting effect of indole and o-ethylaniline in their hydrogenation process during dibenzothiophene hydrodesulphurization at conditions commonly used in the hydrotreatment of diesel feedstocks has been experimentaly determined. The self-inhibition behavior of these compounds is non-linear, showing strong inhibition at concentrations as low as 22 ppm (as nitrogen). The experimental data for the hydrogenation of indole and o-ethylaniline was quantitatively represented by a Langmuir-Hinshelwood type rate equation, showing that indole self-inhibition is 10 times stronger than o-ethylaniline self-inhibition. (C) 2002 Elsevier Science B.V All rights reserved.
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