Production of syngas from carbon dioxide reforming of methane by using LaNi_xFe_(1-x)O_3 perovskite type catalysts

摘要

A series of bulk and supported LaNixFe1-xO3 catalysts were synthesized, characterized and studied for dry reforming of methane (DRM) reaction. The catalysts were synthesized using sol-gel, incipient wetness impregnation (IWI) and co-precipitation methods. The catalysts were characterized by BET, XRD, FE-SEM, H2-TPR, and FTIR spectroscopy. A specific type of perovskite phase was obtained while changing the ratio of Ni to Fe for the synthesis of LaNixFe1-xO3 perovskite catalyst. The addition of supports increased the dispersion of perovskite phase, surface area and pore volume of the bulk perovskite catalysts. The support silica destroyed the perovskite features of the catalysts at higher calcinations temperature. The most active catalyst was found to be 40LaNi0.75Fe0.2SO3/SiO2 calcined at 973 K for the DRM reaction with ratio of CH4:CO2:N2 as 1:1:2. The highest conversion corresponded to the catalyst calcined at 1073 K. However, the highest products yields and selectivity obtained while the catalyst was calcined at 773 K for 1 h. Thus, the choice of Ni to Fe ratio, support, method of synthesis and catalyst calcination temperature were crucial factors while synthesizing and designing a perovskite catalyst for dry reforming of methane reaction. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.