Catalytic activity in hydrogenation processes of catalysts containing nanodimensional palladium on carbon support. Concentration effect of palladium and precursor

Abstract

We showed earlier that catalysts obtained by depositing nanodimensional palladium on various nanocarbon materials: fullerenes, nanotubes, fullerene soot, and also activated coconut carbon [1, 2] possessed substantially higher catalytic activity in alkene hydrogenation in comparison with industrial catalysts, where palladium was deposited on activated carbon. At the same time, we found that the nature of nanocarbon material has no essential effect upon catalytic activity. The obtained catalysts posses a pronounced affinity towards hydrogen absorption. The dependence of the absorbed hydrogen amount on the palladium content in the catalyst is of extremal character. The absorption maximum is achieved at comparatively low palladium content in the catalyst (0.1 wt %) and equals to 30– 35 mol of Н2 per 1 mol of Pd.