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Kinetic study of carbon nanotubes synthesis by fluidized bed chemical vapor deposition

Philippe, Régis and Serp, Philippe and Kalck, Philippe and Kihn, Yolande and Plee, Dominique and Gaillard, Patrice and Bernard, Daniel and Caussat, Brigitte Kinetic study of carbon nanotubes synthesis by fluidized bed chemical vapor deposition. (2009) AIChE Journal, vol. 55 (n° 2). pp. 450-464. ISSN 0001-1541

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Official URL: http://dx.doi.org/10.1002/aic.11676

Abstract

Multi-walled carbon nanotubes (MWCNTs) have been produced with high selectivity by fluidized bed catalytic Chemical Vapor Deposition from ethylene on Fe/Al2O3 catalysts. The influence of operating parameters such as deposition duration, temperature, ethylene and hydrogen partial pressures and iron loading, on MWCNT productivity, process selectivity, characteristics of final powders and chemical composition of the outlet gases has been analyzed. Using gas phase chromatography, methane and ethane have been detected whatever the conditions used. Between 650 and 750°C, no catalyst deactivation occurs because nucleation remains active all along the synthesis thanks to the explosion of the catalyst grains. Above 650°C, ethane itself produces MWCNTs, whereas methane does not react in the temperature range 550-750°C. The formation of MWCNTs induces marked bed expansions and sharp decreases of grain density. Apparent kinetic laws have been deduced from the collected data. The apparent partial orders of reaction for ethylene, hydrogen and iron were found to be 0.75, 0 and 0.28 respectively.

Item Type:Article
Additional Information:The definitive version is available at http://www3.interscience.wiley.com The original PDF of the article can be found at AIChE Journal website : http://www3.interscience.wiley.com/journal/107061889/home
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Arkema (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
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Deposited By: Brigitte CAUSSAT-BONNANS
Deposited On:01 Apr 2009 13:42

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