Nickel-based perovskite catalysts: synthesis and catalytic tests in the production of syngas
Abstract La1-xSrxNiO3 (x= 0.0, 0.3 or 0.7) perovskite-type oxides were synthesized using the modified proteic gel method and using collagen as an organic precursor. Catalysts of La1-xSrxNiO3/Al2O3 were obtained using the wet impregnation method. The synthesized catalysts were characterized by X-ray...
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Veröffentlicht in: | Cerâmica 2018-09, Vol.64 (371), p.436-442 |
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Format: | Magazinearticle |
Sprache: | eng |
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Zusammenfassung: | Abstract La1-xSrxNiO3 (x= 0.0, 0.3 or 0.7) perovskite-type oxides were synthesized using the modified proteic gel method and using collagen as an organic precursor. Catalysts of La1-xSrxNiO3/Al2O3 were obtained using the wet impregnation method. The synthesized catalysts were characterized by X-ray diffraction, surface area and temperature-programmed reduction. The catalysts were evaluated in the partial oxidation reaction of methane, and the levels of selectivity to CO, CO2, H2 and H2O were determined. Among the catalysts studied, the catalyst LaNiO3/Al2O3 had the highest methane conversion level (78%) and higher H2 selectivity (55%).
Resumo Perovskitas do tipo La1-xSrxNiO3 (x= 0,0, 0,3 ou 0,7) foram sintetizadas utilizando o método do gel proteico modificado e usando colágeno como precursor orgânico. Catalisadores do tipo La1-xSrxNiO3/Al2O3 foram obtidos utilizando-se o método da impregnação úmida. Os catalisadores sintetizados foram caracterizados por difratometria de raios X, área superficial e redução à temperatura programada. Os catalisadores foram avaliados na reação de oxidação parcial do metano, e os níveis de seletividade ao CO, CO2, H2 e H2O foram determinados. Dentre os catalisadores estudados, o catalisador LaNiO3/Al2O3 foi o que apresentou maior nível de conversão de metano (78%) e maior seletividade ao H2 (55%). |
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ISSN: | 0366-6913 1678-4553 1678-4553 |
DOI: | 10.1590/0366-69132018643712329 |