silicon carbon core shell particel synthsus

6 As supports, conventional systems mostly rely on porous Al 2O 3, SiO 2 or TiO 2 due to their high surface area to accommodate the metal nanoparticles. 4, 5 Co performs very similar, whereas Fe has a high activity but suffers from a poorer methane selectivity. Ni is the most common methanation catalyst, due to its high activity and methane selectivity. Finally, the simultaneous CO/CO 2 co-methanation experiments show a high flexibility of the catalyst materials on different gas feed compositions.īoth CO and CO 2 methanation reactions are usually catalyzed by supported transition metals. In comparison to a Co/mSiO 2 reference catalyst with the same Co particle size a significantly higher methane selectivity was found for CO 2 hydrogenation, which we attribute to the confinement effect of the core-shell structure and therefore a higher probability of CO readsorption. CO methanation experiments reveal a rapid temperature-depended deactivation for temperatures above 350 ☌ caused by coking and possible blocking of the pores. Here we report on a core-shell catalyst - 2 - for the hydrogenation of CO/CO 2 mixtures towards methane. Therefore, novel nanostructured core-shell catalysts are part of scientific discussion, since these materials offer an exceptional resistance against thermal sintering. The formation of the byproduct water leads to a hydrothermal environment, which necessitates stable catalyst materials under harsh reaction conditions. CO x hydrogenation reactions for hydrocarbon synthesis, such as methane, are becoming more and more important in terms of the energy transition.

Silicon carbon core shell particel synthsus