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Environmental Engineering Research 2002;7(4): 247-252. DOI: https://doi.org/10.4491/eer.2002.7.4.247
CARBON NANOTUBES RESULTED FROM THE CARBON DIOXIDE REFORMING BY CATALYTIC PYROLYSIS TO REDUCE THE GREENHOUSE GAS
Ho Joon Seo1, and Eui Yeon Yu2
1Division of Biotechnology and Chemical Engineering, Yosu National University, Yosu 550-747, Korea
2Department of Chemical Engineering and the Research Institute for Catalysis, Chonnam National University, Gwangju 500-757, Korea
Corresponding Author: Ho Joon Seo ,Tel: +82-61-659-3294, Fax: +82-61-653-3659, Email: hjseo@yosu.ac.kr
Received: July 9, 2002;  Accepted: August 10, 2002.
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ABSTRACT
Carbon nanotubes formed in carbon dioxide reforming (CDR) by catalytic pyrolysis were dicussed on the basis of analysis results by SEM, TEM, and FT-IR. The only active phases of Rh or Pd on AI2O3 matrix were responsible for making carbon nanotubes, and the wisker carbon was produced on Rh(5)/Ce(l VAI2O3 and Rh(5)/La203 catalyst. The mechanism of carbon nanotubes growth was proposed that carbon formed by methane cracking and Boudouard reaction dissolve in the metal (Pd, Rh), and then the bulk and surface diffusion of dissolved carbon occur through the metal particle (Pd, Rh). The CDR by catalytic pyrolysis over Pd(5)/AhOi and Rh(5)/Ab03 catalysts was suggested to be useful for the effective preparation of carbon nanotubes.
Keywords: carbon nanotubes | catalytic pyrolysis | CO2 reforming | greenhouse gas
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