Abstract

Presently, the production of syngas through the dry reforming of methane is a widely employed approach for reducing vast amounts of greenhouse gas emissions. Several metals, particularly transition metals support have been evaluated as active DRM catalyst systems. In this work, a comparative studies is presented between Cobalt and Nickel metals impregnated over fibrous silica-alumina (FSA) support synthesized by the hydro-thermal method for dry methane reforming. The specimens were characterized via FESEM mapping, TEM, XRD, H2-TPR, XRF, N2 physisorption, and KBr-FTIR techniques. Unlike the Co/FSA, Ni/FSA displayed a higher surface area with a fine dispersion of Ni nano-crystalline and less agglomeration, and more active sites which enhanced the metal-support inter-action. Approximately 0.2g of each catalyst was evaluated at 650-800 degrees C with a respective. CH4:CO2:N2 ratio of 1:1:2, gas hourly space velocity 30,000 mL g-1 h-1. The Ni/FSA demonstrated more conversion of CH4 (89%) over (67%) of Co/FSA at 800 degrees C. After 10 h of long-term reaction, the Ni/FSA exhibited more stability at 800 degrees C. TGA/DTA, Raman, and TEM results showed that spent Ni/FSA catalysts did not demonstrate signs of considerable nano-graphitic carbon or metal sintering as compared to Co/FSA catalysts, which had bigger crystallites of Co. The finding of this study would add new knowledge on reaction conditions involving and catalytic activities of the metals over the FSA.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.