fulltext.study @t Gmail

Effect of iron on the properties of sulfated zirconia

Paper ID Volume ID Publish Year Pages File Format Full-Text
43207 45958 2008 12 PDF Available
Title
Effect of iron on the properties of sulfated zirconia
Abstract

Sulfated zirconia has found several industrial applications, mainly for catalyzing reactions which require acidic sites. In order to control the properties of this solid, the effect of iron on the sulfated zirconia properties was studied in this work. Samples with different iron to zirconium molar ratios were prepared by the sol–gel method, followed by sulfation and characterization by several techniques. It was found that all iron ions go into zirconia when Fe/Zr ≤ 0.4. However, when higher amounts of iron (Fe/Zr ≥ 0.8) are added, hematite is segregated. Different phases can be obtained depending on the iron content and on the sulfur presence. Iron increases the specific surface areas of both sulfated and pure zirconia but does not affect the incorporation of sulfate groups as compared to pure zirconia. Iron also makes the solids thermally more stable and modifies the sulfated zirconia surface creating acidic sites with medium strength. Therefore, it is possible to control the acidity of the solid doping the sulfated zirconia with iron. All these changes are very useful for catalytic applications.

Graphical abstractThe effect of iron on sulfated zirconia was studied in this work. When Fe/Zr ≤ 0.4 all iron ions go into zirconia but higher amounts (Fe/Zr ≥ 0.8) leads to segregation of hematite. Iron increases the specific surface areas, makes the solids thermally more stable and creates acidic sites with medium strength. All these changes are very useful for catalytic applications.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Iron-doped zirconia; Sulfated iron oxide; Sulfated zirconia
First Page Preview
Effect of iron on the properties of sulfated zirconia
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 334, Issues 1–2, 1 January 2008, Pages 187–198
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