SBA-15 supported mesoporous Ni and Co catalysts with high coke resistance for dry reforming of methane

摘要

In this study, the activity of the mesoporous SBA-15 supported Ni, Co and Ni-Co catalysts prepared by the wet -impregnation were investigated in dry reforming of methane reaction. The catalysts were characterized by XRD, TPR, N-2 adsorption-desorption isotherms, SEM, TEM and TG/DT techniques before and/or after activity tests. N-2 adsorption-desorption isotherm of the all catalysts were consistent with Type IV isotherm, indicating mesoporous structures. TEM images of bimetallic Ni-Co catalysts clearly proved the presence of characteristic honeycomb structure. Incorporation Co into SBA-15 supported Ni catalysts inhibited the agglomeration of the nickel particles due to the formation of Ni-Co alloy. Activity test results showed that bimetallic 4Ni-1Co@SBA-15 catalyst (Ni/Co:4/1) gave highly promising activity with high methane (73%) and carbon dioxide (89%) conversion values at 750 degrees C. Co incorporation into SBA-15 supported Ni catalyst significantly decreased the coke formation during dry reforming of methane. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.