Inhibition effects of nitrogen compounds on the hydrodesulfurization of dibenzothiophene

The inhibiting effect of basic and non-basic nitrogen compounds on the hydrodesulfurization (HDS) of dibenzothiophene (DBT), at conditions commonly used in the hydrotreatment of diesel feedstocks, has been experimentally determined. Nitrogen compounds studied herein are quinoline, indole, carbazole...

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Bibliographic Details
Published in:	Applied catalysis. A, General Vol. 207; no. 1; pp. 103 - 112
Main Authors:	Laredo S, Georgina C, De los Reyes H, J.Antonio, Luis Cano D, J, Jesús Castillo M, J
Format:	Journal Article
Language:	English
Published:	Amsterdam Elsevier B.V 01-02-2001 Elsevier
Subjects:	Applied sciences Carbazole Catalysis Catalytic reactions Chemistry Crude oil, natural gas and petroleum products Dibenzothiophene (DBT) Energy Exact sciences and technology Fuels General and physical chemistry Hydrodenitrogenation (HDN) Hydrodesulfurization (HDS) Hydrotreatment (HDT) Indole Inhibition Mixtures Nitrogen compounds Processing of crude oil and oils from shales and tar sands. Processes. Equipment. Refinery and treatment units Quinoline Reaction kinetics Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Hydrodenitrogenation (HDN) Mixtures Indole Reaction kinetics Hydrodesulfurization (HDS) Nitrogen compounds Quinoline Hydrotreatment (HDT) Inhibition Carbazole Dibenzothiophene (DBT) Mixed catalyst Catalytic reaction Hydrotreating Transition metal Tricyclic compound Experimental study Cobalt Molybdenum Supported catalyst Petrochemical industry Sulfur heterocycle Hydrodenitrogenation Concentration effect Reaction inhibition Aromatic compound Kinetic parameter Rate constant Catalyst activity Alumina Gaseous phase reaction Hydrodesulfurization
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Summary:	The inhibiting effect of basic and non-basic nitrogen compounds on the hydrodesulfurization (HDS) of dibenzothiophene (DBT), at conditions commonly used in the hydrotreatment of diesel feedstocks, has been experimentally determined. Nitrogen compounds studied herein are quinoline, indole, carbazole and a quinoline:indole:carbazole (Q:I:C) mixture in a proportion similar to that found in typical diesel feedstocks. The inhibiting effect of the non-basic compounds, indole and carbazole, was found to be comparable to that of the basic compound, quinoline. The inhibition behavior of these compounds is highly non-linear, showing strong inhibition at concentrations as low as 5 ppm (as nitrogen). The Q:I:C mixture has a stronger inhibiting effect than any one of the individual components at equivalent concentrations. The experimental data for DBT HDS in the presence of quinoline, indole and carbazole was quantitatively represented by a modified Langmuir–Hinshelwood type rate equation and the data for the mixture by an extension of this model, using the apparent adsorption constants calculated from the inhibition results for the individual compounds.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0926-860X 1873-3875
DOI:	10.1016/S0926-860X(00)00620-7