fulltext.study @t Gmail

The influence of dopants on the catalytic activity of hematite in the ethylbenzene dehydrogenation

Paper ID Volume ID Publish Year Pages File Format Full-Text
43751 45987 2008 6 PDF Available
Title
The influence of dopants on the catalytic activity of hematite in the ethylbenzene dehydrogenation
Abstract

The effect of neodymium, lanthanum, aluminum and zirconium on the textural and catalytic properties of hematite was studied in this work, which aimed to develop catalysts to ethylbenzene dehydrogenation, in the presence of steam, the main commercial route to obtain styrene. Hematite and magnetite were found in fresh and spent catalysts, respectively. All dopants increased the specific surface area of the fresh and spent catalysts and made them more resistant against reduction, but only aluminum avoided sintering during reaction. The dopants increased the catalytic activity per area of hematite, except aluminum which acted only as a textural promoter. The selectivity was decreased due to zirconium and lanthanum while the other dopants did not change this parameter. The neodymium-containing catalyst showed high levels of activity and selectivity and was able to work up to 530 °C, without deactivation, being the most promising with regard to styrene production.

Graphical abstractThe effect of neodymium, lanthanum, aluminum and zirconium on the textural and catalytic properties of hematite was studied to develop catalysts to ethylbenzene dehydrogenation to produce styrene. The neodymium-containing catalyst showed high activity and selectivity and was able to work up to 530 °C, without deactivation, being the most promising for styrene production. Figure shows activity of the catalysts in ethylbenzene dehydrogenation as a function of time at different temperatures for neodymium-doped iron oxide. () 490 °C; (■) 510 °C; (▴) 530 °C and (●) 550 °C. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Styrene; Ethylbenzene; Hematite
First Page Preview
The influence of dopants on the catalytic activity of hematite in the ethylbenzene dehydrogenation
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 341, Issues 1–2, 15 June 2008, Pages 12–17
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