Comparative study the activity in dry reforming of methane of bioxide NiO-CO3O4 and NiO-Fe2O3 systems supported on the granulated natural diatomite

Abstract

In this work, catalytic systems NiO-Co₃O₄ and NiO-Fe₂O₃ bioxide supported on the granulated natural diatomite from the Georgia deposit were investigated as catalysts for the dry reforming of methane. The results showed that the NiO-Co₃O₄/D catalyst is more active and stable than NiO-Fe₂O₃/D. At the reaction temperature 850 ^oC the conversion of methane on the NiO-Co₃O₄/D catalyst was 77%, whereas on the NiO-Fe₂O₃/D – 42%. The activity of the NiO-Co₃O₄/D catalyst in the reaction is probably due to the high dispersity of the catalyst particles. The results of SEM-EDX, XRD, and AES showed that cobalt oxide in the composition of NiO-Co₃O₄/D is in the form of nanoparticles with sizes much smaller than the sensitivity threshold of X-ray diffraction analysis (<100Å).