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Effect of H2S partial pressure on the transformation of a model FCC gasoline olefin over unsupported molybdenum sulfide-based catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
43117 45955 2008 7 PDF Available
Title
Effect of H2S partial pressure on the transformation of a model FCC gasoline olefin over unsupported molybdenum sulfide-based catalysts
Abstract

The selective HDS of FCC gasoline is a sensitive option for reducing sulfur content in commercial gasoline. For such applications, a minimum activity of the catalyst toward olefin hydrogenation is required to preserve the high octane number of the feedstock. The conversion of a model FCC olefin (2,3-dimethyl-2-ene: 23BMB2N) under close HDS conditions was investigated over unsupported molybdenum sulfide-based catalysts promoted by nickel or cobalt. The effect of the partial pressure of H2S, as produced during HDS process, on hydrogenation activity of molybdenum-based catalysts was specially studied. The results reveal and confirm the highest promoting effect of nickel compared to cobalt in the hydrogenation of the olefin on unsupported transition metal sulfides (TMS) which is consistent with the fact that CoMo/Al2O3 catalyst is more selective than the NiMo/Al2O3 catalyst for the HDS of FCC gasoline. However, unsupported NiMo catalyst was also the most sensitive towards H2S for olefin hydrogenation. Therefore, for high sulfur content, the selectivity difference between CoMo and NiMo catalysts might be reduced.

Graphical abstractThe conversion of a model FCC olefin (2,3-dimethyl-2-ene) was investigated over unsupported molybdenum sulfide-based catalysts promoted by nickel or cobalt. The effect of the partial pressure of H2S was studied. The results reveal and confirm the highest promoting effect of nickel compared to cobalt which is consistent with the fact that CoMo/Al2O3 catalyst is most selective for the HDS of FCC gasoline.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Hydrogenation; Gasoline; 2,3-Dimethylbut-2-ene; Molybdenum sulfide-based catalyst; Promoting effect; Nickel; Cobalt
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Effect of H2S partial pressure on the transformation of a model FCC gasoline olefin over unsupported molybdenum sulfide-based catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 344, Issues 1–2, 15 July 2008, Pages 198–204
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