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Effect of TiO2–ZrO2 composition on catalytic activity of supported NiSO4 for ethylene dimerization

Paper ID Volume ID Publish Year Pages File Format Full-Text
43722 45985 2007 8 PDF Available
Title
Effect of TiO2–ZrO2 composition on catalytic activity of supported NiSO4 for ethylene dimerization
Abstract

A series of catalysts: NiSO4/TiO2–ZrO2, having different TiO2–ZrO2 compositions, for ethylene dimerization was prepared by the impregnation method using an aqueous solution of nickel sulfate. No diffraction line of nickel sulfate was observed up to 30 wt%, indicating good dispersion of nickel sulfate on the surface of the supported NiSO4 catalysts. The surface area and acidity of TiO2–ZrO2 binary metal oxide increased remarkably compared with the values for single metal oxides, TiO2 or ZrO2. The binary oxide TiO2–ZrO2 calcined above 600 °C resulted in the formation of a crystalline orthorhombic phase of ZrTiO4. Therefore, NiSO4/TiO2–ZrO2 calcined at 500 °C exhibited a maximum catalytic activity, and then the catalytic activity decreased with the calcination temperature. NiSO4 supported on 50TiO2-50ZrO2 (TiO2/ZrO2 ratio = 1) exhibited the highest catalytic activity for ethylene dimerization among TiO2–ZrO2 binary oxides. The catalytic activities of supported NiSO4 catalysts were correlated with the acidity of catalysts measured by the ammonia chemisorption method, regardless of the kind of support (TiO2, ZrO2, or TiO2–ZrO2).

Graphical abstractNiSO4/TiO2–ZrO2 for ethylene dimerization was prepared by the impregnation method. The surface area and acidity of TiO2–ZrO2 binary metal oxide increased remarkably compared with single metal oxide. NiSO4 supported on 50TiO2–50ZrO2 among TiO2–ZrO2 binary oxides exhibited the highest catalytic activity for ethylene dimerization. The catalytic activities of supported NiSO4 catalysts were correlated with the acidity of catalysts.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Ethylene dimerization; Effect of TiO2–ZrO2 composition; Acidic properties; ZrTiO4 phase
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Effect of TiO2–ZrO2 composition on catalytic activity of supported NiSO4 for ethylene dimerization
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 321, Issue 1, 29 March 2007, Pages 27–34
Authors
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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