Lanthanum-Promoted Nickel-Based Catalysts for the Dry Reforming of Methane at Low Temperatures

Abstract In recent decades, considerable attention has been paid to the catalytic dry reforming of methane obtain syngas. This reaction very important environmental implications due utilization CH 4 and CO 2 , gases that contribute greenhouse effect. The is normally carried out over strong basic catalysts with noble metals. Nickel emerged as an interesting alternative, although it tends deactivate form carbon whiskers, which could block reactor. It therefore necessary improve their performance (conversion, selectivity stability). this work, Ni 0.69 La 0.31 0.14 Mg 0.55 were studied in reaction. precursors prepared by co-precipitation oxide phases obtained calcining these at 450°C/6 h. XRD diagrams calcined samples show formation mixed a periclase-like structure. Analysis temperature-programmed reduction shows presence shifts higher temperatures. catalysts, reduced 650°C, tested function operating time 650°C. No deactivation occurred after 20 h operation. Furthermore, combination drastically improves conversion catalyst (> 95%).