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Fischer-Tropsch performance correlated to catalyst structure: Trends in activity and stability for a silica-supported cobalt catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
40122 45844 2013 7 PDF Available
Title
Fischer-Tropsch performance correlated to catalyst structure: Trends in activity and stability for a silica-supported cobalt catalyst
Abstract

•Particle size and size distribution of Co Fischer-Tropsch (FT) catalysts was determined from XRD.•FT performance was measured at industrially relevant conditions (210 °C, H2/CO = 2, 20 bar).•FT turnover frequency increases linearly with Co0 particle size up to 9.8 nm.•The breadth of the particle size distribution correlates directly to FT stability.•We show an active catalyst with deactivation of −0.08% CO converted/day in a microchannel reactor.

The influence of the cobalt particle size and particle size distribution in determining Fischer-Tropsch (FT) performance for silica supported catalysts was investigated. Using a line broadening powder X-ray diffraction analysis, both the particle size and particle size distribution of cobalt were estimated and compared to the FT activity and stability at industrially relevant conditions (210 °C, H2/CO = 2, 20 bar). It was shown that the apparent turnover frequency increased linearly with Co0 particle size up to 9.8 nm, the largest size tested. For the first time, it has been shown that the breadth of the particle size distribution correlates directly to catalyst stability. Using these correlations, a highly active and stable catalyst was developed, showing a deactivation rate of −0.08% CO converted/day in a microchannel reactor with an activity of 0.25 molCO gCo−1 h−1.

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Keywords
Fischer-Tropsch; Cobalt; Particle size; Silica; X-ray diffraction
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Fischer-Tropsch performance correlated to catalyst structure: Trends in activity and stability for a silica-supported cobalt catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 464–465, 15 August 2013, Pages 200–206
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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