Investigation of In Promotion on Cu/ZrO2 Catalysts and Application in CO2 Hydrogenation to Methanol

Author(s)

Rossi, Marco A. ; Rasteiro, Leticia F. ; Vieira, Luiz H. ; Fraga, Marco A. ; Assaf, Jose M. ; Assaf, Elisabete M.

• Document type: Journal article
• Source: CATALYSIS LETTERS; v. N/A, p. 17-pg., 2022-10-21.

Abstract

Herein, we investigated the effect of indium promotion (0, 5, and 10%) on the physicochemical properties of Cu/ZrO2 catalysts, which were evaluated by several characterization techniques, and applied in the CO2 hydrogenation to methanol. The results showed that indium (In) was incorporated in the ZrO2 structure, which increased the oxygen vacancies and structural defects, increasing surface basicity and Cu relative content, leading these materials to present lower conversions but higher methanol selectivity. Mechanistic insights provided by in-situ DRIFTS analysis showed that the higher methanol selectivity of the In-promoted catalysts is also attributed to the ability of indium to take the CO2 hydrogenation mechanism through the formate intermediate as the preferential route, preventing CO formation and decreasing its selectivity. A chemometric approach was used to find the optimized temperature, pressure, and GHSV (456 K, 3 MPa, and 12 L.g(-1).H-1) for CuZrInS, leading to the higher methanol selectivity (similar to 93%), with similar to 1.8% of conversion. [GRAPHICS] . (AU)

• FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
• Grantee: Julio Romano Meneghini
• Support Opportunities: Research Grants - Research Centers in Engineering Program
• FAPESP's process: 17/22671-5 - Ga-Ni nanoparticles supported on porous silica for methanol synthesis from CO2 at low pressures
• Grantee: Letícia Fernanda Rasteiro
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 18/12021-6 - Partial oxidation of methane to methanol catalyzed by single-atom noble metal (Rh, Pd or Pt) supported on doped mesoporous CeO2 (Ce1-xMxO2, M = Zr, Sn or La)
• Grantee: Luiz Henrique Vieira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 17/10154-6 - Study on catalysts based on metal-metal oxide nanocomposites doped and encapsulated by mesoporous coating for methanol production by CO2 hydrogenation
• Grantee: Marco Aurélio de Lima Silva Rossi
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 15/06246-7 - Biorefinery concept applied to biological wastewater treatment plants: environmental pollution control coupled with material and energy recovery
• Grantee: Marcelo Zaiat
• Support Opportunities: Research Projects - Thematic Grants