Parametric Study for the Growth of Single-Walled Carbon Nanotubes over Co-Mo/MgO in Fluidized Bed Reactor by CCVD Method

Carbon nanotubes with high yield and quality were synthesis by chemical vapordeposition over Co-Mo/ MgO in a fluidized bed reactor. Different parameters such as temperature, ratio of hydrocarbon source to hydrogen, rate of gas, the run duration, the size of catalyst particles, the ramp of temperature and the kind of hydrocarbon source have been examined. The influence of these parameters on the carbon nanotubes yield and quality are reported. In the best operation conditions (900°C, 30 min, rate of gas=1800mL/min, ramp temperature 7°C/min, size of catalyst particle=212
m, ratio of hydrocarbon source to hydrogen=1/1) single walled carbon nanotubes with 0.9nm average diameter and 300% yield is produced.