Nickel-based perovskite catalysts: synthesis and catalytic tests in the production of syngas

Catalisadores à base de níquel com estrutura perovskita: síntese e testes catalíticos na produção de gás de síntese

Abstract

La_1-xSr_xNiO₃ (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 La_1-xSr_xNiO₃/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%).

Keywords:
La_1-xSr_xNiO₃; perovskite-type oxides; modified proteic gel method; partial oxidation of methane