Rhenium-contained catalysts based on superacid ZrO2 supports for CO2 utilization

Abstract

Rhenium catalysts are quite rarely used as systems for hydrogenation reaction despite the great variety of Re oxidation states and high potential. Re-containing catalysts were synthesized based on two types of superacid oxide supports: sulfated (SZ) and tungsten-doped zirconium oxide (WZ). The investigation of the obtained samples showed the significant difference in their textural and chemical properties depending on the carrier type. The study of prepared catalysts in the CO2 hydrogenation reaction revealed the high selectivity toward CO (more than 94%) over a Re2O7/SZ catalyst while a large amount of methane was formed over Re-contained catalysts based on the WZ support.