The extensive study has been carried out on Carbon nanotubes (CNTs) during the past two decades and thermal Catalytic Chemical Vapour Deposition (CCVD) method has been widely used by the researchers for synthesis CNTs using a metal catalyst. The literature available on CNTs synthesis using ternary metal catalyst is limited compared to binary and single catalyst. This article presents the work carried out on ternary catalyst Fe-Co-Ni with varying percentage, i.e. from 3%, 5%, 7% and 10%. The deposition is carried out at a temperature range of 600oC to 750oC. The acetylene (C2H2) gas is used as a carbon source and argon (Ar) for an inert atmosphere. It is observed that maximum carbon deposit 0.786 gram per gram of catalyst obtained at 700oC. The SEM images show that significant carbon nanotubes produced and large bundles were observed. The three stage purification used for cleaning the carbon deposit. The high quality carbon nanotubes obtained as it is evident from the Raman analysis and the ID/IG of the annealed carbon nanotubes is 1.68.