Effect of the Addition of Alkaline Earth and Lanthanide Metals for the Modification of the Alumina Support in Ni and Ru Catalysts in CO2 Methanation

In order to reduce greenhouse gas emissions, which are reaching alarming levels in the atmosphere, capture, recovery, and transformation of carbon dioxide emitted methane is considered a potentially profitable process. This transformation, known as methanation, catalytic reaction that mainly uses catalysts based on noble metals such Ru and, although with less efficiency, transition Ni. improve efficiency these conventional catalysts, effect adding alkaline earth (Ba, Ca, or Mg at 10 wt%) lanthanides (La Ce 14 nickel (13 wt%), ruthenium (1 both-based has been studied temperatures between 498 773 K bar pressure. The deactivation resistance presence H2S was also monitored. incorporation La into catalyst produces interactions active metal Ni, Ru, Ru-Ni alumina support, determined by characterization. fact results an improvement activity 13Ni/Al2O3 catalyst, achieves yield 82% 680 for 13Ni/14La-Al2O3, addition increase resistance. Furthermore, 89% achieved 1Ru-13Ni/14La-Al2O3 651 K, but it showed be more vulnerable presence.