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K and Mn doped iron-based CO2 hydrogenation catalysts: Detection of KAlH4 as part of the catalyst's active phase

Paper ID Volume ID Publish Year Pages File Format Full-Text
42232 45916 2010 10 PDF Available
Title
K and Mn doped iron-based CO2 hydrogenation catalysts: Detection of KAlH4 as part of the catalyst's active phase
Abstract

Hydrogenation of CO2 to hydrocarbons is investigated over iron-based catalysts supported on γ-alumina to produce unsaturated hydrocarbons as feedstock chemicals for jet-fuel synthesis. Over 40% conversion levels can be achieved by doping this catalyst with Mn and K, along with an olefin/paraffin ratio of over 4. The doping levels played a crucial role in the product distribution as well as CO2 conversion yields, with over doping leading to suppression of the desirable hydrocarbon products. The characterization of the catalyst showed the presence of KAlH4 as part of the catalyst's active phase, acting as a reversible H2 reservoir and as a center for H2 activation. Characterization of the catalysts by XRD, XPS, and SEM sheds light on the role each dopant had on the overall catalyst's activity and product distribution.

Graphical abstractCO2 hydrogenation to hydrocarbons is investigated over several iron-based catalysts supported on γ-alumina. Potassium as a co-catalyst leads to a marked improvement in CO2 conversion and an olefin/paraffin ratio of over 4. Characterization of the catalyst showed the presence of KAlH4.Figure optionsDownload full-size imageDownload high-quality image (107 K)Download as PowerPoint slide

Keywords
Iron catalyst; CO2 hydrogenation; KAlH4
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K and Mn doped iron-based CO2 hydrogenation catalysts: Detection of KAlH4 as part of the catalyst's active phase
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 373, Issues 1–2, 31 January 2010, Pages 112–121
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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