NDLI: Coking behavior on a Ni–Mo/Al$_{2}$O$_{3}$ catalyst for the hydrocracking of vacuum residue

Content Provider	Springer Nature Link
Author	Kweon, Hyukmin Nguyen Huy, Chinh Kim, Hanna Lee, Youngil Shin, Eun Woo
Copyright Year	2014
Abstract	In this study, we performed the hydrocracking of vacuum residue (VR) in an autoclave reactor using a Ni–Mo/Al$_{2}$O$_{3}$ catalyst at 450 and 500 °C under 150 bar of pressure and characterized coke structure generated over the catalyst during the reaction in order to understand the coking behavior in the hydrocracking of vacuum residue. The insoluble coke generated during VR hydrocracking was characterized by N$_{2}$ sorption, TGA, XRD, FE-SEM (EDX), EPMA, FT-IR, Raman, and $^{13}$C CP/MAS–NMR techniques. In the absence of catalyst, dominant thermal hydrocracking at 500 °C produced pregraphite coke containing sulfur compounds since sulfur components in the feed could not be removed by thermal hydrocracking. With catalyst, the coke structures generated during a reaction depended on the reaction temperature. The NMR, Raman, XRD, TPO, and FT-IR spectra showed that amorphous coke containing highly branched oligomers and polycyclic aromatics were generated during hydrocracking at 450 °C, whereas hydrocracking at 500 °C mainly produced pregraphite coke. The presence of the catalyst in hydrocracking of VR played an important role in increasing decomposition of VR and decreasing coke deposition.
Starting Page	133
Ending Page	147
Page Count	15
File Format	PDF
ISSN	18785190
Journal	Reaction Kinetics and Catalysis Letters
Volume Number	113
Issue Number	1
e-ISSN	18785204
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-06-10
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrocracking Vacuum residue Ni–Mo/Al$_{2}$O$_{3}$ Catalyst Coke structure Deactivation Catalysis Physical Chemistry Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Catalysis

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