Synthesis of LaNiO3 perovskite by the modified proteic gel method and study of catalytic properties in the syngas production

• Autor(a) principal: Santos,José C.
• Data de Publicação: 2012
• Outros Autores: Souza,Marcelo J. B., Ruiz,Juan A. C., Melo,Dulce M. A., Mesquita,Maria E., Pedrosa,Anne M. Garrido
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Journal of the Brazilian Chemical Society (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012001000014
• topic: LaNiO3 perovskites; collagen; syngas production; partial oxidation of methane

This work describes a study on the synthesis of LaNiO3 perovskites via the modified proteic gel method, varying collagen content and on the catalytic activity of LaNiO3 and LaNiO3/Al2O3 in the syngas (CO + H2) production. X-ray diffraction patterns revealed the formation of perovskite structure in all samples prepared by proteic gel synthesis method, varying collagen content and after calcinations at 700 ºC for 2 h. LaNiO3/Al2O3 catalyst prepared by the impregnation method showed diffraction peaks due to the perovskite structure and to the support (Al2O3). This catalyst presented: specific surface of 46.1 m² g-1, two reduction peaks in the temperature programmed reduction (TPR) profile and 46% of methane conversion (by the partial oxidation of methane using oxygen) after 18 h of reaction.