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The influence of operating conditions on the growth of carbon nanofibers on carbon nanofiber-supported nickel catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
43995 45998 2007 13 PDF Available
Title
The influence of operating conditions on the growth of carbon nanofibers on carbon nanofiber-supported nickel catalysts
Abstract

Carbon nanofibers (CNFs) were prepared by the catalytic decomposition of ethylene over Ni/Y-zeolite at 550 °C, followed by catalyst removal with hydrofluoric acid. The demineralised CNFs were impregnated in an aqueous solution of Ni(II) nitrate. The CNF-supported Ni exhibited high catalytic activity in the CVD synthesis of CNFs, proving that the structured CNF support served to stabilize Ni activity. Results clearly indicated that careful control of temperature and H2 content was important to achieve the desired product. Changing the total flow rate did not seem to alter the type of carbon deposited but did change the deposition rate.

Graphical abstractCarbon nanofibers (CNFs) were prepared by the catalytic decomposition of ethylene over Ni/Y-zeolite at 550 °C, followed by catalyst removal with hydrofluoric acid. The demineralised CNFs were impregnated in an aqueous solution of Ni(II) nitrate. The CNF-supported Ni exhibited high catalytic activity in the CVD synthesis of CNFs, proving that the structured CNF support served to stabilize Ni activity. Results clearly indicated that careful control of temperature and H2 content was important to achieve the desired product. Changing the total flow rate did not seem to alter the type of carbon deposited but did change the deposition rate. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Carbon nanofiber; Chemical vapour decomposition; Nickel; Carbon yield
First Page Preview
The influence of operating conditions on the growth of carbon nanofibers on carbon nanofiber-supported nickel catalysts
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 319, 1 March 2007, Pages 246–258
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis