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Highly efficient Ru/Sm2O3-CeO2 catalyst for ammonia synthesis

Paper ID Volume ID Publish Year Pages File Format Full-Text
50742 46812 2011 4 PDF Available
Title
Highly efficient Ru/Sm2O3-CeO2 catalyst for ammonia synthesis
Abstract

A series of Ru/Sm2O3–CeO2 catalysts were prepared by using a co-precipitation (CP) method and characterized by XRD, BET, SEM, H2-TPD-MS, H2-TPR and CO chemisorption. The activity test shows that ammonia concentration of the catalyst with 7% Sm is 13.4% at 10 MPa, 10,000 h− 1, 425 °C, which is 21% higher than that of Ru/CeO2. Such high catalytic activity was due to three effects: the morphology changes of catalyst, electrodonating property of partially reduced CeO2 − x to Ru metal and the property of easily hydrogen desorption derived from the presence of Sm3+ in ceria.

Graphical abstractHighly efficient Ru/Sm2O3 was prepared by samarium doping ceria for ammonia synthesis. Higher catalytic activity was due to the morphology changes of catalyst, electrodonating property of partially reduced CeO2 − x to Ru metal and the property of easily hydrogen desorption derived from the presence of Sm3+ in ceria.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The samarium doping can affect catalyst morphologies and the dispersion of Ruthenium. ► The samarium doped ceria is a good support of Ru based catalysts for NH3 synthesis. ► Samarium doping created the advantageous effect of CeO2 reduction and H2 desorption.

Keywords
Co-precipitation; Ruthenium; Sm2O3–CeO2; Ammonia synthesis
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Highly efficient Ru/Sm2O3-CeO2 catalyst for ammonia synthesis
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 15, Issue 1, 15 November 2011, Pages 23–26
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
Online Support
Any Questions? feel free to contact us