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Mesoporous materials from zeolite seeds as supports for nickel–tungsten sulfide active phases: Part 2. Catalytic properties for deep hydrodesulfurization reactions

Paper ID Volume ID Publish Year Pages File Format Full-Text
44252 46011 2006 6 PDF Available
Title
Mesoporous materials from zeolite seeds as supports for nickel–tungsten sulfide active phases: Part 2. Catalytic properties for deep hydrodesulfurization reactions
Abstract

The properties of nickel–tungsten sulfide supported on MCM-41 aluminosilicate materials assembled from beta-zeolite seeds (β-MCM-41) were examined in the conversion of 4,6-dimethyldibenzothiophene (4,6-DMDBT) pure or in mixture with dimethyldisulfide, carbazole and tetralin. As reported in the part I, the properties of the acidic supports assembled from zeolite BEA seeds are strongly related to the preparation conditions, especially to the duration of the thermal treatment leading to the zeolite seeds. For this study, two materials were selected: one obtained after a short pre-treatment time (tseeds = 6 h), whose structure is essentially MCM-41-like, and the other, obtained after a long pre-treatment time (tseeds = 16 h) which is mostly zeolitic. In order to examine the effect of the acid function of the β-MCM-41 material on the catalytic properties of the supported catalyst, β-MCM-41-alumina supports were prepared by mixing the two oxides (0, 15, 50 and 85% β-MCM-41). The important and regular increase of activity observed upon increasing the β-MCM-41 content is due to an increase in the hydrogenation properties of the active phase, indicating an electronic effect of the acidity on the supported phase. It is particularly interesting to note that this advantage of the mesoporous support is maintained even in the presence of inhibitors. For zeolite-like support, the 4,6-DMDBT is also converted through isomerization.

Keywords
Hydrodesulfurization; 4,6-dimethyldibenzothiophene; Mesoporous material; MCM-41; Nickel–tungsten sulfide; BEA zeolite; Beta zeolite; Aluminate mesostructure
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Mesoporous materials from zeolite seeds as supports for nickel–tungsten sulfide active phases: Part 2. Catalytic properties for deep hydrodesulfurization reactions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 298, 10 January 2006, Pages 88–93
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us