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Effect of in-situ sulfur poisoning on zinc-containing spinel-supported cobalt CO hydrogenation catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
38952 45798 2016 9 PDF Available
Title
Effect of in-situ sulfur poisoning on zinc-containing spinel-supported cobalt CO hydrogenation catalyst
Abstract

•In-situ addition of 0.1–1, 10, 100 and 300 ppmv of sulfur over Co/ZnAl2O4·Al2O3.•CS2 may poison both Co/ZnAl2O4·Al2O3 and conventional Co/γ-Al2O3 catalysts.•0.1–1 ppmv of S does not have a significant negative effect on catalyst activity.•At 100 ppmv S, the deactivation of Co/ZnAl2O4·Al2O3 is reversible to some extent.•Rate of S sorption by Co/ZnAl2O4·Al2O3 is 3.1 times higher than that by Co/γ-Al2O3.

Literature about sulfur addition over AB2O4 spinel-supported cobalt CO hydrogenation catalysts is sparse. Research about the use of carbon disulfide as the sulfur carrier for the poisoning of cobalt catalysts is also sparse. In this study, effect of the addition of 0.1–1, 10, 100 and 300 ppmv of sulfur (injected as carbon disulfide) on the structure and performance of a Co/ZnAl2O4·Al2O3 CO hydrogenation catalyst was characterized (by ICP, XRD, nitrogen sorption and FESEM) and evaluated in a fixed-bed reactor. The addition of 0.1–1 ppmv of sulfur did not have a significant negative effect on the activity of Co/ZnAl2O4·Al2O3 catalyst. At S equivalent concentration of 100 ppmv, the deactivation of Co/ZnAl2O4·Al2O3 catalyst was reversible to some extent. At identical S equivalent concentration of 100 ppmv, the rate of S sorption by Co/ZnAl2O4·Al2O3 catalyst was 3.1 times higher than that by Co/γ-Al2O3 catalyst, making the former a potential catalyst (or sorbent) to be loaded at the top portion (or pre-catalytic bed) of a fixed-bed FT reactor to scavenge sulfur from syngas feedstock.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (66 K)Download as PowerPoint slideThe concentration of S in feedstock has significant effect on catalytic activity. The rate of S sorption by Co/ZnAl2O4·Al2O3 catalyst at 100 ppmv S is 3.1 times higher than that by Co/γ-Al2O3 catalyst, making the former a potential catalyst (or sorbent) to be loaded at the top portion (or pre-catalytic bed) of a fixed-bed FT reactor to scavenge sulfur from syngas feedstock.

Keywords
CO hydrogenation; Cobalt catalyst; Sulfur poisoning; Deactivation; Fischer-Tropsch synthesis
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Effect of in-situ sulfur poisoning on zinc-containing spinel-supported cobalt CO hydrogenation catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 514, 25 March 2016, Pages 164–172
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