| Texto completo | |
| Autor(es): |
dos Santos de Oliveira, Francisco Marcelo
;
Gomes, Janaina Fernandes
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Brazilian Journal of Chemical Engineering; v. N/A, p. 14-pg., 2025-07-23. |
| Resumo | |
Carbon dioxide (CO2) is the main gas responsible for the greenhouse effect. Anthropogenic activities have increased the concentration of this gas in the atmosphere in recent years, intensifying the greenhouse effect and resulting in anomalous climate phenomena. CO2 recycling technologies have been developed with the aim of reducing the impacts of this gas on climate change. Catalytic hydrogenation of CO2 for the generation of products of commercial interest, such as methanol (CH3OH) and ethanol (C2H5OH), for example, is a technology that has attracted the attention of recent research, given the wide industrial applicability of these alcohols and the possibility of carbon recycling. In the present study, CO2 hydrogenation reaction was investigated to produce alcohols using catalysts based on cobalt, copper and a combination between cobalt and copper. It was observed that CuO-Co3O4-Al2O3 catalysts with different Co:Cu mass ratios have improved methanol productivity when compared to CuO-Al2O3 or Co3O4-Al2O3. Furthermore, the promotion of Co3O4-Al2O3 by 2 wt% Na, K, Rb or Cs showed better catalytic performance for the formation of ethanol, increasing its productivity up to 25 times compared to the non-promoted cobalt catalyst. The highest ethanol productivity in the present work, corresponding to 5.3 mu mol/g(cat).h, was achieved using the 2 wt% K-Co3O4-Al2O3 catalyst under the reaction conditions of T = 220 degrees C, P = P-atm and GHSV = 24,000 mL/g(cat).h. (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 |