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Hydroprocessing on chromium-containing metal sulfide catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
40973 45873 2012 10 PDF Available
Title
Hydroprocessing on chromium-containing metal sulfide catalysts
Abstract

We showed previously that unsupported catalysts prepared from amine thiomolybdates incorporated with bivalent metals (Fe, Ni, Co) are highly active for hydrodenitrogenation (HDN) and hydrodesulfurization (HDS). In particular, an iron-promoted molybdenum sulfide catalyst gives a much higher HDN-to-HDS activity ratio than commercial supported catalysts. The present study examines trivalent chromium as a promoter for MoS2. The catalyst precursors are synthesized via two routes: one involves olation, the other chelation. Tests with a catalytic cycle oil show that the behaviors of the Cr-containing catalysts prepared from the two routes are qualitatively similar. Chromium is a more effective HDN promoter than iron. The Fe0.5Cr0.5Moy (1 ≤ y ≤ 1.5) trimetallic sulfide is more active and selective for HDN than FeMo and CrMoy bimetallic sulfides. The predominant phase in the chromium-containing catalysts comprises nanocrystalline MoS2 and amorphous Cr2S3.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (57 K)Download as PowerPoint slideHighlights► The hydrodenitrogenation activity and selectivity of MoS2 can be greatly enhanced by chromium. ► Chromium and iron are synergistic co-promoters for enhancing the HDN activity of MoS2. ► The predominant phase in unsupported chromium-promoted MoS2 catalysts comprises nanocrystalline MoS2 and amorphous Cr2S3.

Keywords
Hydrodesulfurization; Hydrodenitrogenation; Hydrogenation; Chromium promoted molybdenum sulfide catalysts; Olation; Trimetallic sulfide catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 421–422, 16 April 2012, Pages 38–47
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