Reactive CO2 capture using dual-function catalysts based on zeolitic structures and transition metals

Resumo

With the increasing combustion of fossil fuels leading to the release of greenhouse gases and triggering various climate changes, such as global warming and ocean acidification, the development of technologies capable of mitigating these effects through the utilization and conversion of these harmful gases has become increasingly important. The application of dual-function catalysts has gained prominence in this field, as they can capture and provide active sites for these reactions. The impregnation of transition metals with high selectivity onto supports, such as zeolites, enables the optimization of these catalytic materials. The study of the CO₂ hydrogenation reaction using Rh supported on NaZSM-5 and NaZSM-5 modified with extra-framework Na, at intermediate temperatures ranging from 300 to 450 °C, demonstrates the conversion capability of these catalysts toward value-added products, accompanied by noteworthy yields. An increase in these performance indicators was also observed with the modification of the catalytic supports with Na, suggesting that the structural alteration is associated with enhanced conversion efficiency and selectivity of the materials.