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Acid treated carbon nanofibers as catalytic support for heavy oil hydroprocessing

Paper ID Volume ID Publish Year Pages File Format Full-Text
53712 46981 2015 7 PDF Available
Title
Acid treated carbon nanofibers as catalytic support for heavy oil hydroprocessing
Abstract

•Functionalised CNF coated with Ni decorated MoS2 slabs were prepared.•Catalytic performance was investigated in the hydroprocessing of a vacuum residue.•Coke formation was very low with CNF-supported catalysts.•CNF-supported catalysts yielded results comparable to the Al2O3-supported catalyst.

The catalytic performance of functionalised CNF coated with Ni-decorated MoS2 slabs on the hydroprocessing of a Maya vacuum residue was studied and compared with a benchmark alumina-supported NiMo catalyst. NiMo/CNF catalysts were characterised by N2 adsorption, X-ray diffraction and temperature programmed reduction of sulfided species (TPR-S). It was found that thermal cracking mainly controlled the conversion of the fraction with boiling point above 450 °C (X450+), and that catalytic cracking influenced the asphaltene conversion. MoS2 slabs morphology was varied by modifying the CNF surface chemistry. The amount of coordinately unsaturated sites determined by TPR-S was related to the MoS2 slabs morphology, although its relationship with the catalytic activity was not straightforward. Higher hydrogenation activity of the CNF supported catalysts allowed to obtain relatively high metal and sulphur conversions, despite the lack of carbon surface acidity. This helped suppress coke formation, at the expense of a less deep cracking into lighter molecules. Overall, CNF-supported catalyst yielded results comparable to the Al2O3-supported catalyst, implying that they have a high potential in heavy oil hydroprocessing.

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Keywords
Carbon nanofibers; Functionalisation; MoS2; Vacuum residue; Hydroprocessing
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Acid treated carbon nanofibers as catalytic support for heavy oil hydroprocessing
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 249, 1 July 2015, Pages 79–85
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