NDLI: Simultaneous tetralin HDA and dibenzothiophene HDS reactions on NiMo bulk sulphide catalysts obtained from mixed oxides

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Catalysis Science & Technology Vol - 4 Issue - 4

Catalysis Science & Technology Vol - 4 Issue - 3

Catalysis Science & Technology Vol - 4 Issue - 2

Catalysis Science & Technology Vol -3

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Catalysis Science & Technology Vol -1

Simultaneous tetralin HDA and dibenzothiophene HDS reactions on NiMo bulk sulphide catalysts obtained from mixed oxides

Content Provider	Royal Society of Chemistry (RSC)
Author	Faro, Arnaldo C. Licea, Yordy E. Palacio, Luz A. Bettini, Jefferson Eon, Jean G. Echavarría, Adriana Amaya, Sandra L.
Copyright Year	2014
Abstract	NiMo bulk sulphide catalysts were obtained from mixed-oxides. The mixed-oxides were obtained by calcining the as-synthesized lamellar precursor with the so-called ϕy structure and (NH4)H2xNi3−x(OH)2(MoO4)2 formula. The corresponding mixed-oxides obtained by calcination were characterized by nitrogen adsorption, XRD, and ICP. Mixtures of α-NiMoO4 and β-NiMoO4 were obtained. A batch reactor was used for CS2/n-hexadecane in situ sulphidation of the mixed-oxides. A mixture of dibenzothiophene and tetralin was used for the liquid phase reaction carried out at 613 K and 70 bar. After the catalytic tests, the bulk sulphide catalysts were characterised by nitrogen physical adsorption, synchrotron light XRD, EXAFS and HR-TEM. The EXAFS simulations are consistent with disordered nickel sulphide particles dispersed in the catalysts. HR-TEM images showed randomly oriented, stacked-layer particles typical of Mo sulphide. The bulk catalysts had larger HDS and HDA activities and selectivities for hydrogenation reactions than alumina supported conventional catalysts containing the same Ni : Mo ratio. A pronounced support effect was observed for both HDS and HDA reactions. The use of the support strongly suppressed both cyclohexylbenzene formation in HDS of DBT and cis-decalin formation in HDA of tetralin. This suggests that similar active sites are involved in the formation of these compounds on the one hand, while another type of site is involved in biphenyl and trans-decalin formation on the other.
Starting Page	1227
Ending Page	1238
Page Count	12
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	4
Issue Number	5
Journal	Catalysis Science & Technology
DOI	10.1039/c3cy00801k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Aluminium oxide Tetralin Mo Extended X-ray absorption fine structure Calcination Batch reactor Nitrogen Hydrogenation X-ray crystallography Adsorption DBT NiMo Nickel Synchrotron Dibenzothiophene
Content Type	Text
Resource Type	Article
Subject	Catalysis

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