An active and stable NiOMgO solid solution based catalysts prepared by paper assisted combustion synthesis for the dry reforming of methane

Ni supported on solid solution (NiOMgO) catalysts with different Ni concentration (10, 20 and 30 wt.%) were prepared by a novel paper assisted combustion synthesis (PACS) method, followed by a reduction stage. All as-synthesized materials formed NiOMgO solid solutions, which under optimum PACS conditions exhibited up to about 140 m2/g BET surface area, which is one of the highest reported so far for this type of materials. Solid solutions were not active unless reduced at higher temperatures, causing a fraction of the Ni to segregate to the surface to become the active sites. The activity during the dry reforming of methane was studied as a function of temperature, and time on stream (TOS). The PACS solid solution with 10 wt.% of Ni had the highest surface area and, upon reduction, it was the most active and stable catalyst exhibiting low carbon formation at 600 °C, and no carbon deposition at 700 °C during 24 h TOS. The activity results correlated well with the higher surface area of the starting solid solutions, the smaller Ni crystallite sizes, and the number of Ni2+ and Ni3+ sites on the surface.We gratefully acknowledge the support of this work by grant NPRP-8-509-2-209from the Qatar National Research Fund (member of the Qatar Foundation). The statements made herein are solely the responsibility of the authors. We also acknowledged the use of the following Facilities at the University of Notre Dame: Notre Dame Integrated Imaging Center (NDIIC), Notre Dame Materials Characterization Facilities (MCF), and Notre Dame Center for Environmental Science & Technology (CEST).Scopu

An insight into the effects of synthesis methods on catalysts properties for methane reforming

Methane can be converted into other useful products such as H2 and liquid fuels to reduce its environmental impact. Due to majorly high energy requirements and the endothermic nature of the reforming process, catalysts are essential. The catalyst preparation method is one of the aspects that can improve the catalytic performance by enhancing the catalyst’s physicochemical properties. These methods alter the metal-support interaction, thereby changing the kinetics of the catalyst which can result in enhanced productivity, reduced cost, and optimized energy requirements. This review compares state-of-the-art catalyst preparation methods and discusses their effects on the physicochemical properties of the catalysts used in methane reforming processes