fulltext.study @t Gmail

Synergy effect of MgO and ZnO in a Ni/Mg–Zn–Al catalyst during ethanol steam reforming for H2-rich gas production

Paper ID Volume ID Publish Year Pages File Format Full-Text
55661 47060 2011 8 PDF Available
Title
Synergy effect of MgO and ZnO in a Ni/Mg–Zn–Al catalyst during ethanol steam reforming for H2-rich gas production
Abstract

Nickel based mixed oxide catalysts derived from Ni–Mg–Zn–Al hydrotalcite-like precursors are prepared and evaluated for H2-rich gas production via ethanol steam reforming. It has been found that the catalyst properties (e.g. BET surface area, Ni dispersion and reducibility) and catalytic performance depend on the Mg:Zn molar ratio. MgO and ZnO have a synergetic effect. At 700 °C, the quaternary catalyst with a Mg:Zn ratio of 4 exhibits the highest H2 yield and best stability, viz. no apparent variation of the product distribution over 100 h operation, whereas the ternary catalyst without Mg suffers severe coke accumulation after 7 h on-stream. Two types of carbon (filamentous and amorphous) are found deposited on the catalyst surface. The carbon deposited is dominated by filamentous carbon, which is likely originated from the decomposition of methane, and does not cause immediate deactivation.

Graphical abstractLong-term stability test over a catalyst with Mg:Zn ratio = 4 at 700 °C.Figure optionsDownload full-size imageDownload high-quality image (94 K)Download as PowerPoint slideHighlights► Ni/Mg–Zn–Al catalysts derived from hydrotalcite-like precursors are active in ethanol steam reforming. ► The quaternary catalyst with a Mg:Zn ratio of 4 is hard to reduce, has a high Ni dispersion and good catalytic performance. ► TPO and HR-TEM verify that two types of carbon deposited on the catalyst surface.

Keywords
Hydrogen production; Ethanol; Steam reforming; Filamentous carbon; Hydrotalcite-like compound
First Page Preview
Synergy effect of MgO and ZnO in a Ni/Mg–Zn–Al catalyst during ethanol steam reforming for H2-rich gas production
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: Catalysis Today - Volume 178, Issue 1, 15 December 2011, Pages 206–213
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