Ni-Based SBA-15 Catalysts Modified with CeMnO_x for CO₂ Valorization via Dry Reforming of Methane: Effect of Composition on Modulating Activity and H₂/CO Ratio.

ABSTRACT: Dry reforming of methane with ratio CH₄/CO₂ = 1 is studied using supported Ni catalysts on SBA-15 modified by CeMnO_x mixed oxides with different Ce/Mn ratios (0.25, 1 and 9). The obtained samples are characterized by wide-angle XRD, SAXS, N₂ sorption, TPR-H₂, TEM, UV-vis and Raman spectroscopies. The SBA-15 modification with CeMnO_x decreases the sizes of NiO nanoparticles and enhances the NiO-support interaction. When Ce/Mn = 9, the NiO forms small particles on the surface of large CeO₂ particles and/or interacts with CeO₂, forming mixed phases. The best catalytic performance (at 650 °C, CH₄ and CO₂ conversions are 51 and 69%, respectively) is achieved over the Ni/CeMnO_x

SUBMITTER: Grabchenko MV 

PROVIDER: S-EPMC10574277 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature