Analysis of effluent gases during the CCVD growth of multi-wall carbon nanotubes from acetylene
Abbreviated Journal Title
catalytic chemical vapor deposition; carbon nanotubes; thermodynamic; analysis; chromatography; LARGE-SCALE PRODUCTION; CATALYTIC DECOMPOSITION; HYDROGEN; SUPPORT; Chemistry, Physical; Materials Science, Multidisciplinary
Catalytic chemical vapor deposition was used to grow multi-walled carbon nanotubes on a Fe:Co:CaCO3 catalyst from acetylene. The influent and effluent gases were analyzed by gas chromatography and mass spectrometry at different time intervals during the nanotubes growth process in order to better understand and optimize the overall reaction. A large number of byproducts were identified and it was found that the number and the level for some of the carbon byproducts significantly increased over time. The CaCO3 catalytic support thermally decomposed into CaO and CO2 resulting in a mixture of two catalysts for growing the nanotubes, which were found to have outer diameters belonging to two main groups 8-35 nm and 40-60 nm, respectively. (c) 2006 Elsevier Ltd. All rights reserved.
"Analysis of effluent gases during the CCVD growth of multi-wall carbon nanotubes from acetylene" (2006). Faculty Bibliography 2000s. 6554.