Role of vanadium in Ni:Al 2O 3 catalysts for carbon dioxide reforming of methane

Abstract

The CO 2 reforming of CH 4 was performed over V-promoted Ni/Al 2O 3 catalysts similarly prepared by the polymeric precursor method. The H 2 chemisorption, X-ray diffraction (XRD) and X-ray photoemission spectroscopy (XPS) analyses show that a low V wt.% addition suppresses the NiAl 2O 4 formation. Moreover, the CHN results point out to a low carbon deposition and the surface area (BET) abruptly increases upon the addition of 0.8 wt.% V. On the other hand, the sample with high V wt.% presented the highest carbon deposition, what was attributed to the CH 4 decomposition increase promoted by the V.