Impact of the copper load on the performance of Cu/UiO-67 in CO₂ hydrogenation to ethanol at atmospheric pressure

Autor(es)

de Paula, Luana do Nascimento Rocha ; Gomes, Janaina Fernandes ; Assaf, Jose Mansur

• Tipo de documento: Artigo Científico
• Fonte: CATALYSIS TODAY; v. 444, p. 7-pg., 2024-08-28.

Resumo

CO2 hydrogenation to ethanol could be a potential approach to reduce dependence on fossil resources, but faces challenges related to product selectivity and catalyst stability. MOFs, particularly UiO-67, acting as a support for copper catalysts can contribute to overcoming these limitations by stabilizing intermediates, creating interfaces that protect active sites against deactivation and potentially generating synergistic effects that favor the formation of the C-C bond. In this scenario, the present work aims to synthesize Cu/UiO-67 for application in the CO2 hydrogenation to ethanol at atmospheric pressure. The impact of the copper loading (5-60 wt%) on the catalyst physical properties and ethanol productivity was evaluated. Using XRD, N-2 physisorption, TEM-EDS, FTIR and H-2-TPR, it was possible to confirm the maintenance of the UiO-67 structure, which begins to deform with increasing copper content. Catalytic results showed that ethanol, methanol, propanol, carbon monoxide, and acetaldehyde have been produced. The selectivity of alcohols is related to the amount of copper, decreasing at high contents, indicating the importance of active sites interaction with SBUs units in alcohols formations. (AU)

• Processo FAPESP: 17/08420-0 - Múltiplas estratégias para converter CO2 a moléculas plataforma e produtos químicos de valor agregado: investigações catalíticas e eletrocatalíticas
• Beneficiário: Janaina Fernandes Gomes
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Jovens Pesquisadores
• Processo FAPESP: 22/10615-1 - Consolidação do conceito de biorrefinaria aplicado ao tratamento biológico de águas residuárias e de resíduos sólidos
• Beneficiário: Marcelo Zaiat
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 20/15230-5 - Centro de Pesquisa e Inovação de Gases de Efeito Estufa - RCG2I
• Beneficiário: Julio Romano Meneghini
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 18/23601-3 - Múltiplas estratégias para converter CO2 a moléculas plataforma e produtos químicos de valor agregado: investigações catalíticas e eletrocatalíticas
• Beneficiário: Janaina Fernandes Gomes
• Modalidade de apoio: Bolsas no Brasil - Programa BIOEN - Jovens Pesquisadores