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FTS fuels production over different Co/SiC catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
55396 47050 2012 10 PDF Available
Title
FTS fuels production over different Co/SiC catalysts
Abstract

The technical feasibility for Fischer–Tropsch synthetic fuels production over different cobalt/SiC catalysts was studied. Silicon carbide-supported catalysts were prepared by means of incipient wetness impregnation (IWI) and characterized by N2 adsorption/desorption, acid/base titrations, XRD, TEM, TPR and pulse oxidation techniques. The bench scale catalytic performance was examined at a total pressure of 20 bar, a temperature range between 220 and 250 °C, a space velocity (GHSV) of 6000 N cm3 g−1 h−1 and using syngas with H2/CO molar ratio equal to 2. For SiC-supported catalysts, the use of a certain amount of calcium as promoter resulted in a higher basicity and a slight higher cobalt dispersion. Furthermore, particle size and the degree of reduction were found to be directly influenced by the cobalt loading. A maximum extent of reduction was found at 12–15 wt.% cobalt with little dependence on the addition of promoter. Catalytic activity provided promising Fischer–Tropsch performance with C5+ selectivity values higher than 90% in all the cases and especially on promoted catalysts (higher than 95%). In addition, promoted catalysts shifted C5+ hydrocarbon product distribution to higher molecular weight demonstrating that different commercial synthetic fuels formulations (gasoline to diesel) can be provided by modifying mCo-nCa/SiC catalyst composition.

Graphical abstractDepending on the desired fuel product, a different mCo-nCa/SiC catalyst formulation should be performed, e.g. unpromoted 20 wt.% Co catalyst resulted in gasoline formulation whereas catalyst 5Co-2Ca/SiC provided a very selective diesel one.Figure optionsDownload full-size imageDownload high-quality image (85 K)Download as PowerPoint slideHighlights► Influence of mCo-nCa/SiC composition on bench scale Fischer–Tropsch synthesis. ► Synthetic fuels production. ► Basicity and particle size directly depends on Ca and Co loadings, respectively. ► Degree of reduction was clearly non-linear influenced by Co showing a maximum. ► Different compositions provided different CO conversion and C5+ formulations.

Keywords
Fischer–Tropsch synthesis; Bench scale; Synthetic fuels; Cobalt; Calcium; SiC
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 187, Issue 1, 30 June 2012, Pages 173–182
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