fulltext.study @t Gmail

Ru-doped Ni catalysts effective for the steam reforming of methane without the pre-reduction treatment with H2

Paper ID Volume ID Publish Year Pages File Format Full-Text
44544 46041 2006 6 PDF Available
Title
Ru-doped Ni catalysts effective for the steam reforming of methane without the pre-reduction treatment with H2
Abstract

Ru-added Ni catalysts supported on Al2O3 or MgAl2O4 were prepared and tested for the methane steam reforming to investigate the Ru-induced effects on the catalytic activity, the suppression of carbon deposition and the in situ self-activation of the oxidized catalysts during the reforming. The Ni catalysts promoted with a small amount of Ru (≤1 wt%) showed a moderate reforming activity without a pre-reduction treatment using H2; however, the Ni catalysts unpromoted with Ru were active only after reducing the catalysts with H2. Among the Ru-added Ni catalysts, the catalyst prepared by sequentially impregnating Ru by 0.5 wt% over the calcined sample of 20 wt% Ni/Al2O3 showed higher reforming activity than the catalyst prepared by the co-impregnation of 0.5% Ru and 20% Ni over Al2O3. It was also revealed that the Ru doping greatly suppressed carbon growth on the Ni/Al2O3 catalysts. Between the two support materials, MgAl2O4-supported catalysts were more active than Al2O3-supported catalysts. Most of the Ni on the MgAl2O4 support were finely dispersed NiO clusters, while the Ni on the Al2O3 support was hard-to-reduce NiAl2O4. The presence of Ru in a highly dispersed state appears to facilitate the reduction of such Ni-oxides and to decrease the coking propensity of the catalyst in the steam reforming of CH4.

Keywords
Steam reforming; Methane; Ru-promotion; Ni-based catalyst; Reduction; MgAl2O4
First Page Preview
Ru-doped Ni catalysts effective for the steam reforming of methane without the pre-reduction treatment with H2
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 302, Issue 2, 11 April 2006, Pages 151–156
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