Title
The beneficial effect of <tex>$CO_{2}$</tex> in the low temperature synthesis of high quality carbon nanofibers and thin multiwalled carbon nanotubes from <tex>$CH_{_{4}}$</tex> over Ni catalysts The beneficial effect of <tex>$CO_{2}$</tex> in the low temperature synthesis of high quality carbon nanofibers and thin multiwalled carbon nanotubes from <tex>$CH_{_{4}}$</tex> over Ni catalysts
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Oxford ,
Subject
Physics
Source (journal)
Carbon. - Oxford
Volume/pages
50(2012) :2 , p. 372-384
ISSN
0008-6223
ISI
000297397700004
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
A low temperature chemical vapor deposition method is described for converting CH4 into high-quality carbon nanofibers (CNFs) using a Ni catalyst supported on either spinel or perovskite oxides in the presence of CO2. The addition of CO2 has a significant influence on CNF purity and stability, while the CNF diameter distribution is significantly narrowed. Ultimately, the addition of CO2 changes the CNF structure from fishbone fibers to thin multiwalled carbon nanotubes. A new in situ cooling principle taking into account dry reforming chemistry and thermodynamics is introduced to account for the structural effects of CO2.
E-info
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