Impact of Zirconia and Lanthanum Promoters on Multiwalled CNT Generation in Dry Reforming of Methane

Abstract

In this study, three distinct carbon nanotubes (CNTs) — Zr-Ni/CeO2, La-Ni/CeO2, and Ni/CeO2 were produced via dry reforming of methane (DRM) at 800°C for 180 minutes. These catalysts were initially synthesized using ultrasonic-assisted citric impregnation method to enhance metal promoter dispersion. X-ray diffraction (XRD) confirmed that Zr and La doping minimized carbon deposition. Brunauer-Emmett-Teller (BET) analysis revealed typical mesoporous structures of stacked laminar nanorods. Thermogravimetric analysis (TGA) quantified carbon deposits as Zr-Ni/CeO2 (5.1 wt%)