Promotion impact of different strontium doping on Ni-9La+Zr catalyst for dry reforming of methane

Abstract

The potential dry reforming of methane technology allows for the synthesis of syngas from methane and carbon dioxide. Numerous investigations have been conducted on developing catalysts with exceptional activity and stability. Carbon deposition causes severe deactivation in typical nickel-based catalysts, which is one of the most prevalent and important problems. In this study, methane was dry-reformed over 5 wt.% Ni+xSr-9La+Zr (x = 0–4 wt.%) catalysts for 7.5 h at 700°C and ambient pressure in a tubular fixed-bed reactor. According to the weight percent of Sr loading, the features of the material's texture, morphology, and catalysis were investigated. N2-physisorption, H2-temperature programmed reduction, X-ray diffraction, Raman, and TEM were used to evaluate the physicochemical characteristics of the catalysts. N2-physisorption research revealed that changing the weight percentage loading of the Sr promoter had little effect on the textural qualities. The overall number of reducible NiO-interacting species over the catalyst surface increased with increasing Sr loading. The 5Ni+2Sr-9La+Zr catalyst exhibited the optimum CH4 and CO2 conversions of 62.9%–65.9% and 69.1%–70.3%, respectively, and the lowest deactivation factor of 4.7.