Syngas production from the CO2 reforming of a waste cooking oil model compound over catalysts derived from La1−xSrxNiO3 perovskites

Syngas production from waste cooking oil (WCO) based on reforming with CO2 would allow the utilization of both resources. However, the catalysts used for reforming reactions (700–1000 °C) are prone to deactivation. In this work, La1−xSrxNiO3 (x = 0.1, 0.2) perovskites were prepared as catalyst precursors, then reduced and used for CO2 reforming of a waste cooking oil model compound (WCOMC). These materials exhibited stable catalytic activity during the reaction, attributed to the highly dispersed Ni0 nanoparticles on the La2O3 support and strong interactions between the metal and support. At 800 °C, the deposited amount of carbon on these catalysts decreased with increasing quantity of Sr doping into the A site of LaNiO3 and the syngas had a H2/CO ratio of 0.77. The present Sr-doped catalysts promoted the surface adsorption of oxygen along with the activation of C–H bonds. Most importantly, these materials strongly adsorbed CO2 and facilitated the conversion of carbon deposition to gaseous products.