CuFe and CuCo supported on pillared clay as catalysts for CO2 hydrogenation into value-added products in one-step

Autor(es)

Marcos, Francielle C. F. ; Assaf, Jose M. ; Assaf, Elisabete M.

• Tipo de documento: Artigo Científico
• Fonte: MOLECULAR CATALYSIS; v. 458, p. 10-pg., 2018-10-01.

Resumo

Value-added products synthesis by the one-step CO2 hydrogenation reaction has attracted much attention of researchers. In this paper, three catalysts: Cu/V-A1PILC,CuFe/V-AIPILC, and CuCo/V-Al PILC, prepared by impregnation method on Al-pillared clay support were studied. The effect of Fe and Co additives on the physicochemical properties of Cu-based catalysts was characterized by X-ray powder diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), scanning electron microscope (SEM), N-2 adsorption/desorption isotherms, temperature programmed reduction (TPR), Transmission Electron Microscope (TEM), X-ray photoelectron spectroscopy (XPS), N2O decomposition, CO2 and NH3 temperature-programmed desorption (CO2-TPD and NH3-TPD), and Fourier Transform Infrared Spectroscopy after gaseous pyridine adsorption (Py-FTIR) techniques. These catalysts were evaluated for CO2 hydrogenation into value-added products at temperatures ranging from 250 to 300 degrees C for 3 h and 40 bar pressure. Stability test was performed at 250 degrees C for 24 h and 40 bar pressure. The catalytic behavior revealed that a linear relationship does exist between the CO2 conversion with the metallic area. The DME and methanol synthesis showed a correlation with the basic and acid sites. The CuFe/V-Al PILC catalyst showed the highest selectivity for methanol and DME at 250 degrees C. (C) 2017 Published by Elsevier B.V. (AU)

• Processo FAPESP: 12/17957-3 - Estudo de catalisadores metálicos suportados em argilas naturais pilarizadas para a produção de dimetil éter a partir de gás de síntese.
• Beneficiário: Francielle Candian Firmino Marcos
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 15/06246-7 - Aplicação do conceito de biorrefinaria a estações de tratamento biológico de águas residuárias: o controle da poluição ambiental aliado à recuperação de matéria e energia
• Beneficiário: Marcelo Zaiat
• Modalidade de apoio: Auxílio à Pesquisa - Temático