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Influence of calcination temperatures of Feitknecht compound precursor on the structure of Ni–Al2O3 catalyst and the corresponding catalytic activity in methane decomposition to hydrogen and carbon nanofibers

Paper ID Volume ID Publish Year Pages File Format Full-Text
42679 45937 2009 7 PDF Available
Title
Influence of calcination temperatures of Feitknecht compound precursor on the structure of Ni–Al2O3 catalyst and the corresponding catalytic activity in methane decomposition to hydrogen and carbon nanofibers
Abstract

XRD, N2 physisorption, TPR, XPS, TEM and in situ thermal balance were employed to investigate the influence of calcination temperatures on the structure of Ni–Al2O3 catalysts prepared from Feitknecht compound precursor. The activity of the Ni–Al2O3 catalysts for methane decomposition to produce hydrogen and carbon nanofibers was investigated. In NiO–Al2O3 samples calcined at 573–873 K, only NiO phases were identified, while sample calcined at 1023 K, showed segregated NiAl2O4 spinel was formed. Both the interaction of NiO with Al2O3 in NiO–Al2O3 and that of Ni with Al2O3 in the corresponding Ni–Al2O3 became more complex with the increase of calcination temperature. It seems that the activity of Ni in Ni–Al2O3 for methane decomposition is dependent on the interaction of Ni with Al2O3 and the content of the corresponding Ni.

Graphical abstractNi–Al2O3 catalysts prepared from Feitknecht compound precursor were active for decomposition of methane to produce CO/CO2-free hydrogen and carbon nanofibers. The activity and the stability of the catalysts were dependent on the Ni–Al2O3 structure. The catalyst stability was closely related to the calcination temperature of the precursor during the catalyst preparation process. The influences of the calcination temperatures on the structure and the catalytic activity of Ni–Al2O3 are discussed.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Feitknecht compound; Calcination temperature; Ni–Al2O3 catalyst; Methane decomposition; Hydrogen production; Carbon nanofibers
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Influence of calcination temperatures of Feitknecht compound precursor on the structure of Ni–Al2O3 catalyst and the corresponding catalytic activity in methane decomposition to hydrogen and carbon nanofibers
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 362, Issues 1–2, 30 June 2009, Pages 1–7
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