Performance evaluation of NiCo2O4 spinel as a catalyst for partial oxidation of methane

Resumo

The NiCo2O4 catalyst with spinel structure was prepared by a modified polymeric-precursor method using
gelatin as an organic-directing agent. The obtained powder was characterized by XRD, TPR and tested on the
partial oxidation of methane. The Rietveld analysis performed on the XRD pattern confirmed the crystallization
of two phases, the spinel NiCo2O4, and a solid solution NixCo1-xO. TPR profile revealed that both phases
are entirely reduced up to 610 °C. The catalyst showed CH4 conversion of 75 % with H2/CO ratio around 2
and no signal of deactivation by coke formation, such as confirmed by XRD and TG analysis carried out after
the catalytic test.
Keywords: NiCo2O4, gelatin, partial oxidation of methane.