fulltext.study @t Gmail

Improved activity and coke resistance by promoters of nanosized trimetallic catalysts for autothermal carbon dioxide reforming of methane

Paper ID Volume ID Publish Year Pages File Format Full-Text
40587 45859 2013 10 PDF Available
Title
Improved activity and coke resistance by promoters of nanosized trimetallic catalysts for autothermal carbon dioxide reforming of methane
Abstract

Autothermal carbon dioxide reforming of methane was studied over trimetallic NiCoMn/ZrO2 catalyst promoted with different promoters (Ce, La, Ca, K) aiming to improve the performance of the catalyst and increase their resistance to coking. The promoted catalysts prepared by a coprecitation method showed metal sizes less than 10 nm and were studied with a CH4:CO2:O2 mole ratio of 1:0.8:0.2 at 800 °C under atmospheric pressure. The addition of promoters to NiCoMn/ZrO2 catalyst markedly improved CH4 and CO2 conversions as well as selectivities to H2 and CO relative to the unprompted catalyst. Rare earths Ce and La were more effective promoters than alkaline earth (Ca) and alkali metal (K), showing high and stable CO2 conversions of 95.5% and 89.9%, respectively. The promoted catalysts exhibited higher activity and improved stability with no severe coke deposition and the Ce-promoted NiCoMn/ZrO2 catalyst displayed the highest activity with no apparent activity loss. The roles of the promoters were discussed based on the results of various physicochemical characterization techniques.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (187 K)Download as PowerPoint slideHighlights► Highly active and stable trimetallic catalysts with promoters for autothermal CO2 reforming. ► The Ce-promoted NiCoMn/ZrO2 catalyst displayed the highest activity and stability. ► Nano-sized active metals and increased basic sites by promoters suppressed coking.

Keywords
Trimetallic catalysts; Promoters; Autothermal reforming; Carbon dioxide; Coke resistance
First Page Preview
Improved activity and coke resistance by promoters of nanosized trimetallic catalysts for autothermal carbon dioxide reforming of methane
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 450, 15 January 2013, Pages 63–72
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