The floating catalyst chemical vapor deposition (FCCVD) approach has been successfully employed in offering a continuous single-step process to the synthesis of carbon nanotubes aerogel (CNT aerogel) in terms of the industrial scale. Industrial applications require selecting a carbon source that is abundant, cost-effective and environment-friendly. Thus, waste engine oil (WEO) is preferably employed as a carbon source involving the production of CNT aerogel. In this research study, the catalytic decomposition of the WEO was employed to synthesize CNT aerogel. First, fractional distillation of WEO was achieved resulted in five (5) fractions. As per analysis is performed via GC-MS, low molecular weight hydrocarbons could be efficiently separated, which is required for catalyst dissolving. As per CNS analysis, each fraction was found to contain >69% carbon,