Decarbonization and desulfurization using Cu-Fe/Vo- TiO2 in ambient temperature

The presence of surface oxygen vacancies (V_o) has proven critical in enhancing the reaction and activation processes for the selective oxidation of hydrogen sulfide (H₂S) and carbon dioxides (CO₂). However, achieving efficient H₂S and CO₂ removal at ambient temperatures remains a significant challenge. In this study, we report the synthesis of a copper-iron impregnated titanium oxide (Cu-Fe/V_o-TiO₂) catalyst designed to address this challenge through a facile impregnation method. The objectives of this research were to synthesize and characterize novel multi-metal catalyst and evaluate the feasibility of its application to remove H₂S and CO₂ in room temperature. 1) The synthesized novel multi-metal catalyst was characterized. 2) The effects of multi-metal catalyst, initial H₂S and CO₂ concentration on the behavior of fixed-bed column, and reusability of novel catalyst was investigated. 3) A possible reaction mechanism of novel multi-metal catalyst was proposed through diverse chemical analysis. This study successfully demonstrated the development of Cu-Fe/V_o-TiO₂ as a highly efficient catalyst for H₂S and CO₂ removal at ambient temperature. The synergistic interactions between Cu and Fe species, driven by the electron-donating properties of oxygen vacancies, enabled efficient H₂S and CO₂ adsorption, activation, and conversion. This study establishes Cu-Fe/V_o-TiO₂ as a robust and energy-efficient catalyst for ambient-temperature desulfurization, with significant potential for industrial applications.