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Fischer-Tropsch synthesis. Influence of the crystal size of iron active species on the activity and selectivity

Paper ID Volume ID Publish Year Pages File Format Full-Text
42174 45913 2010 6 PDF Available
Title
Fischer-Tropsch synthesis. Influence of the crystal size of iron active species on the activity and selectivity
Abstract

In order to analyze the influence of the crystal size of the active phase in the Fischer-Tropsch synthesis (FTS), two iron catalysts, supported on MCM-41 and SBA-15, were prepared by incipient wetness impregnation and tested in this reaction. The solids were characterized by atomic absorption spectroscopy, N2 adsorption, X-ray diffraction at low angles and Mössbauer spectroscopy. The activated catalysts showed the same iron species. However, the average crystal size of the active phase is about three times higher in SBA-15 than in MCM-41. Besides, both systems displayed a narrow size distribution. The catalyst with higher crystal size (Fe/SBA-15) presented higher conversion, higher chain growth and lower CH4 production. These results would indicate that the FTS is a “structure sensitive” reaction in a sizes range within, approximately, 3–10 nm.

Graphical abstractIn the present work the influence of the crystal size of the iron active phase in the Fischer-Tropsch synthesis (FTS) is evaluated. The catalyst with higher crystal size (Fe/SBA-15) presented higher conversion, higher chain growth and lower CH4 production. These results confirm that the FTS is a “structure sensitive” reaction in a sizes range within, approximately, 3–10 nm.Figure optionsDownload full-size imageDownload high-quality image (307 K)Download as PowerPoint slide

Keywords
Fischer-Tropsch synthesis; Mesoporous materials; Fe/MCM-41; Fe/SBA-15; Iron catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 379, Issues 1–2, 15 May 2010, Pages 105–110
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
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Any Questions? feel free to contact us