| Texto completo | |
| Autor(es): |
Lopes, Gabriel F.
;
Lucredio, Alessandra F.
;
Vieira, Luiz H.
;
Assaf, Elisabete M.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | NANOSCALE HORIZONS; v. 10, n. 11, p. 10-pg., 2025-09-03. |
| Resumo | |
This study developed heterogeneous catalysts composed of ZnO and CeO2 supported on H-ZSM-5 for the direct conversion of methane (CH4) and carbon dioxide (CO2) into acetic acid. The acid-base and electronic properties were modulated through oxide impregnation and reduction, aiming to create active sites capable of simultaneously activating both reactants. The samples were characterized by XRD, N2 physisorption, HRTEM/EDS, NH3-TPD, CO2-TPD, TPR, FTIR, XPS, CO2-DRIFTS, and TGA, and tested in a batch reactor at 300 degrees C and 10 bar. The catalyst lifetime was evaluated through stability testing. The zeolite framework was preserved, although its properties were modified, resulting in improved CH4 and CO2 activation. The reduced catalyst exhibited a high surface area and an efficient distribution of acidic and basic sites, achieving an acetic acid productivity of 1473.40 mu mol g-1 h-1 and a conversion rate of 35.12%. The results surpassed those of previous studies, highlighting the potential of the Zn-Ce/H-ZSM-5 system for biogas valorization and greenhouse gas mitigation. (AU) | |
| Processo FAPESP: | 22/06419-2 - Desenvolvimento de adsorventes catalíticos para aplicação no processo integrado de captura e conversão de CO2 |
| Beneficiário: | Luiz Henrique Vieira |
| Modalidade de apoio: | Auxílio à Pesquisa - Projeto Geração |
| 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: | 24/04540-4 - Conversão catalítica de biogás em compostos químicos |
| Beneficiário: | Gabriel de Freitas Lopes |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |