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Synthesis of Ag promoted porous Fe3O4 microspheres with tunable pore size as catalysts for Fischer–Tropsch production of lower olefins

Paper ID Volume ID Publish Year Pages File Format Full-Text
49873 46770 2015 5 PDF Available
Title
Synthesis of Ag promoted porous Fe3O4 microspheres with tunable pore size as catalysts for Fischer–Tropsch production of lower olefins
Abstract

•Ag promoted porous microspheres were synthesized.•The pore size of microspheres was controllable.•The introduction of Ag could regulate the dispersion of Fe.•Smaller pore size exhibited high selectivity to C2–4 olefins and low to CH4.

Ag promoted porous Fe3O4 microspheres with tunable pore size were synthesized via one-pot solvothermal method and employed as catalysts for Fischer–Tropsch synthesis. The introduction of Ag played an important role in regulating the pore size of catalysts and the dispersion of Fe. Comparable to unmodified catalyst in this system, Ag promoted Fe-based catalysts displayed excellent selectivity to lower olefins, particularly for Fe–0.9Ag with smaller pore size of 1.33 nm and Fe dispersion of 10.1%. The maximum selectivity to C2 through C4 olefins was 43.0 wt.%, and the selectivity to CH4 was low to 14.8 wt.%.

Graphical abstractAg promoted porous Fe3O4 microspheres with tunable pore size were synthesized using one pot solvothermal method and employed as catalysts for Fischer–Tropsch synthesis. Pore size determined confined space impedes hydrogenation and transportation of long chain hydrocarbon, but facilitates hydrogen abstraction and chain growth via inserting CH2 groups to form olefins, particularly for C2–4 olefins. Furthermore, the effect of dispersion of Fe on lower olefin selectivity was also discussed.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Porous Fe3O4 microspheres; Fischer–Tropsch synthesis; Lower olefins
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Synthesis of Ag promoted porous Fe3O4 microspheres with tunable pore size as catalysts for Fischer–Tropsch production of lower olefins
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 64, 5 April 2015, Pages 32–36
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us