Fluidized Bed Chemical Vapor Deposition Synthesis of Carbon Nanotubes Using Different Fe–Co/Alumina Catalytic Powders
| Autor: | A.B. Dayang Radiah, Firoozeh Danafar, Ahmadun Fakhru’l-Razi, Mohd Amran |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Organic Chemistry Inorganic chemistry Chemical vapor deposition Carbon nanotube Atomic and Molecular Physics and Optics law.invention Catalysis Fluidized bed law General Materials Science Atomic ratio Carbon nanotube supported catalyst Physical and Theoretical Chemistry Dispersion (chemistry) Bimetallic strip |
| Zdroj: | Fullerenes, Nanotubes and Carbon Nanostructures. 20:266-282 |
| ISSN: | 1536-4046 1536-383X |
| DOI: | 10.1080/1536383x.2010.542594 |
| Popis: | Catalytic particles, Iron-Cobalt supported on Alumina, with different metal compositions were investigated in fluidized bed chemical vapor deposition of Ethanol at 600°C to produce carbon nanotubes (CNTs). The characteristics of catalytic particles as well as product were studied using different analytical techniques. Results indicated that the dispersion of metallic nanoparticles was higher when small amounts of two kinds of metal were used. However, lowering of metal content was not always favored with respect to process efficiency. This study proved atomic ratio of the active metals in bimetallic catalyst is not an accurate specification, and mass ratio of the metals should be considered. Also, it was demonstrated that the characteristics of catalytic particles, such as pore structure and their size as well as distribution of the metallic nanoparticles, need to be suitably modified to get the desired quality and quantity of CNTs. |
| Databáze: | OpenAIRE |
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