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Inhibition of the Hydrogenation and Hydrodesulfurization Reactions by Nitrogen Compounds over NiMo/Al2O3.

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Title: Inhibition of the Hydrogenation and Hydrodesulfurization Reactions by Nitrogen Compounds over NiMo/Al2O3.
Authors: Beltramone, A. R.1, Crossley, S.1, Resasco, D. E.1, Alvarez, W. E.2, Choudhary, T. V.2 tushar.v.choudhary@conocophillips.com
Source: Catalysis Letters. Aug2008, Vol. 123 Issue 3/4, p181-185. 5p. 2 Charts, 4 Graphs.
Subjects: Hydrogenation, Hydrocracking, Aromatic compounds, Chemical reactions, Nitrogen
Abstract: The inhibiting effect of nitrogen compounds on the hydrogenation of aromatic compounds and on the hydrodesulphurization (HDS) of dibenzothiophene (DBT) and 4,6-dimethyl dibenzothiophene (4,6 DMDBT), has been systematically investigated over a commercial NiMo hydrotreating catalyst. Amongst the different nitrogen compounds considered, interestingly ammonia was found to have the strongest inhibition effect on hydrogenation as well as on hydrodesulfurization reactions. The inhibiting effects were found to increase in the order quinoline < tetrahydroquinoline < indole < indoline < ammonia for phenanthrene/tetralin hydrogenation and HDS reactions. The molecules with nitrogen atoms having higher negative Mulliken charges showed higher adsorption constants. [ABSTRACT FROM AUTHOR]
Copyright of Catalysis Letters is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Catalysis+Letters%22&quot;&gt;Catalysis Letters&lt;/searchLink&gt;. Aug2008, Vol. 123 Issue 3/4, p181-185. 5p. 2 Charts, 4 Graphs.
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  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Hydrogenation%22&quot;&gt;Hydrogenation&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Hydrocracking%22&quot;&gt;Hydrocracking&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Aromatic+compounds%22&quot;&gt;Aromatic compounds&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Chemical+reactions%22&quot;&gt;Chemical reactions&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Nitrogen%22&quot;&gt;Nitrogen&lt;/searchLink&gt;
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  Data: The inhibiting effect of nitrogen compounds on the hydrogenation of aromatic compounds and on the hydrodesulphurization (HDS) of dibenzothiophene (DBT) and 4,6-dimethyl dibenzothiophene (4,6 DMDBT), has been systematically investigated over a commercial NiMo hydrotreating catalyst. Amongst the different nitrogen compounds considered, interestingly ammonia was found to have the strongest inhibition effect on hydrogenation as well as on hydrodesulfurization reactions. The inhibiting effects were found to increase in the order quinoline &lt; tetrahydroquinoline &lt; indole &lt; indoline &lt; ammonia for phenanthrene/tetralin hydrogenation and HDS reactions. The molecules with nitrogen atoms having higher negative Mulliken charges showed higher adsorption constants. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Catalysis Letters is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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      – SubjectFull: Chemical reactions
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      – SubjectFull: Nitrogen
        Type: general
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      – TitleFull: Inhibition of the Hydrogenation and Hydrodesulfurization Reactions by Nitrogen Compounds over NiMo/Al2O3.
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              Text: Aug2008
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