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C2-oxygenates synthesis through CO hydrogenation on SiO2-ZrO2 supported Rh-based catalyst: The effect of support

Paper ID Volume ID Publish Year Pages File Format Full-Text
40471 45855 2013 7 PDF Available
Title
C2-oxygenates synthesis through CO hydrogenation on SiO2-ZrO2 supported Rh-based catalyst: The effect of support
Abstract

Rh-Mn-Li catalysts supported on SiO2, ZrO2 and SiO2-ZrO2 mixed oxides with various molar ratios of Si/Zr were prepared and tested for the synthesis of C2-oxygenates from syngas. Compared with pure SiO2 and ZrO2 supported catalysts, catalysts supported on SiO2-ZrO2 mixed oxides showed higher activity and C2-oxygenates selectivity, in which Rh-Mn-Li/SiO2-ZrO2 (molar ratio of Si/Zr = 1:3) exhibited the best yield of C2-oxygenates. The effect of the support on the performance of the Rh-based catalysts was investigated comprehensively by XRD, N2 adsorption-desorption, H2 and CO uptakes, FT-IR, XPS, H2-TPR, TPSR and CO-TPD techniques. The results indicated that the chemical state of Rh, CO adsorption species, dispersion of Rh and the ability of CO hydrogenation varied over catalysts supported on SiO2, ZrO2 and SiO2-ZrO2 mixed oxides, which led to the diverse catalytic activity toward C2-oxygenates synthesis.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (139 K)Download as PowerPoint slideHighlights► SiO2-ZrO2 supported catalyst exhibited better activity and C2 oxygenates selectivity. ► SiO2-ZrO2 supported catalyst has higher dispersion of Rh. ► SiO2-ZrO2 supported catalyst has more Rh+ sites for CO insertion. ► SiO2-ZrO2 supported catalyst promotes CO dissociation. ► SiO2-ZrO2 supported catalyst has moderate ability for hydrogenation.

Keywords
Syngas; C2-oxygenates; Rh-based catalyst; SiO2-ZrO2 mixed oxide
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C2-oxygenates synthesis through CO hydrogenation on SiO2-ZrO2 supported Rh-based catalyst: The effect of support
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 454, 15 March 2013, Pages 81–87
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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