fulltext.study @t Gmail

Highly effective perovskite-type BaZrO3 supported Ru catalyst for ammonia synthesis

Paper ID Volume ID Publish Year Pages File Format Full-Text
40449 45854 2013 7 PDF Available
Title
Highly effective perovskite-type BaZrO3 supported Ru catalyst for ammonia synthesis
Abstract

•Perovskite type BaZrO3 is an excellent support of Ru catalyst for NH3 synthesis.•The presence of SMSI effect in Ru/BaZrO3 is advantageous to NH3 ammonia.•Pure phase Ru/BaZrO3 can be obtained by calcination of the precursor in H2 atmosphere at 973 K.•The Ru particles can be highly dispersed on BaZrO3, despite the surface area is only 7.0 m2/g.•The Ru/BaZrO3 catalyst is more attractive for industrial applications.

The ammonia synthesis was performed over Ru catalyst supported on perovskite-type BaZrO3. Physiochemical properties of this catalyst were also characterized by means of various techniques to show the relationships between catalyst structure and catalytic performance. It was found that the ammonia concentration in the effluent of Ru/BaZrO3 catalyst was 6.36% at 673 K under 3.0 MPa, which was much higher than that of Ru catalyst supported on other supports including carbon material systems under the similar conditions, and the rate did not decrease even if the reaction was executed for 120 h. This might be attributed to the facts that the optimum size of Ru particles has more B5-type sites, strong electron-donating ability of the BaZrO3 support and the strong metal–support interaction provides an efficient channel for electron transfer. On the other hand, the adsorption of H2 was inhibited over the surface of this catalyst and the number of active sites for the activation of N2 was also increased.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (77 K)Download as PowerPoint slide

Keywords
Barium zirconate; Strong metal–support interaction; Ru catalyst; Ammonia synthesis; H2 poisoning
First Page Preview
Highly effective perovskite-type BaZrO3 supported Ru catalyst for ammonia synthesis
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 458, 10 May 2013, Pages 130–136
Authors
, , ,
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