Synthesis of MWCNTs by chemical vapor deposition of methane using FeMo/MgO catalyst: role of hydrogen and kinetic study

Roles of hydrogen

Effect of the presence of H₂

In the study roles of H₂, there are two variables that need to be studied which are, the pre-reduction of catalyst and the H₂ feeding during CNTs formation. Four processes: H₂ free process (no pre-reduction process and without H₂ feed during CNTs formation, nR-woH₂), H₂ co-feed process (no pre-reduced process and with H₂ feed during CNTs formation, nR-wH₂), H₂ pre-reduction process (pre-reduction process and without H₂ feed during CNTs formation, R-woH₂), and H₂ combined process (pre-reduction process with H₂ feed…