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Effect of adding CaO to ZrO2 support on nickel catalyst activity in dry reforming of methane

Paper ID Volume ID Publish Year Pages File Format Full-Text
43136 45956 2009 9 PDF Available
Title
Effect of adding CaO to ZrO2 support on nickel catalyst activity in dry reforming of methane
Abstract

Nickel catalysts with a load of 5 wt% Ni, supported on pure ZrO2 and ZrO2 stabilized with 4, 8 and 14 mol% CaO, were prepared by the polymerization method. The samples were characterized by X-ray diffraction (XRD), temperature-programmed reduction with hydrogen (TPR-H2), specific surface area (BET) and impedance spectroscopy (IS) and tested in the carbon dioxide reforming of methane. The XRD patterns showed the presence of the oxide precursor (NiO) and the tetragonal phase of CaO–ZrO2 solid solutions. According to the TPR-H2 analysis, the reduction of various NiO species was influenced by the support composition. The electrical properties of the support have a proportional effect on the catalytic activities. Catalytic tests were done at 800 °C for 6 h and the composition of the gaseous products and the catalytic conversion depended on the CaO–ZrO2 solid solution composition and its influence on supported NiO species. A direct relation was found between the variation in the electrical conductivity of the support, the nickel species supported on it and the performance in the catalytic tests.

Graphical abstractNickel catalysts supported on CaO–ZrO2 solid solutions were tested in dry reforming of methane where the catalytic activity was influenced by the support composition showing the best performance with 8 mol% of CaO, decreasing to higher values of CaO. The mobility of the oxygen vacancies on the supports has a proportional effect on the catalytic performance.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Dry reforming; NiO catalysts; CaO–ZrO2 supports; Electrical conductivity
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Effect of adding CaO to ZrO2 support on nickel catalyst activity in dry reforming of methane
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 358, Issue 2, 1 May 2009, Pages 215–223
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