Comparison of two different synthesis methods of perovskites, SrCo0.5FeO3 type, aiming at evaluating their use as membranes for partial oxidation of methane
Título del documento: Comparison of two different synthesis methods of perovskites, SrCo0.5FeO3 type, aiming at evaluating their use as membranes for partial oxidation of methane
Revue: Materials research
Base de datos: PERIÓDICA
Número de sistema: 000312697
ISSN: 1516-1439
Autores: 1



2
3
Instituciones: 1Instituto Nacional de Tecnologia, Laboratorio de Catalise, Rio de Janeiro. Brasil
2Universidade Federal de Sao Carlos, Departamento de Engenharia de Materiais, Sao Carlos, Sao Paulo. Brasil
3Universidade Federal Fluminense, Departamento de Engenharia Quimica, Niteroi, Rio de Janeiro. Brasil
Año:
Periodo: Abr-Jun
Volumen: 7
Número: 2
Paginación: 319-323
País: Brasil
Idioma: Inglés
Tipo de documento: Nota breve o noticia
Enfoque: Experimental
Resumen en inglés In this work two different synthesis methods of perovskites, SrCo0.5FeO3, were compared: combustion synthesis and oxides mixture aiming at evaluating their use as membranes for partial oxidation of methane. The combustion synthesis method explores an exothermic, generally very fast and self-sustaining chemical reaction between the desired metal salts and a suitable organic fuel, which is ignited at a temperature much lower than the actual phase formation temperature. The oxides mixture are based on a physical mixture of the powder oxides followed by calcination to obtain the desired phase. In order to obtain the membranes, we studied the conformation of bodies and the temperatures of sintering in the two powders synthesized. The powders were analyzed by density and grain size distribution and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). After conformation, in cylindrical form, the green bodies were analyzed by density. After sintering at 1150 °C, the membranes were analyzed by density and they were characterized by XRD and SEM. The powder obtained by combustion synthesis shows lower density and fine grains than the other obtained by oxides mixture. The membranes obtained present very different morphology depending on the precursor powder synthesis. The sintered membranes obtained by combustion method also present a very uniform morphology without segregation
Disciplinas: Ingeniería,
Química
Palabras clave: Ingeniería de energéticos,
Ingeniería de materiales,
Ingeniería química,
Química industrial,
Metano,
Síntesis química,
Perovskita,
Catalizadores
Keyword: Engineering,
Chemistry,
Chemical engineering,
Energy engineering,
Materials engineering,
Industrial chemistry,
Methane,
Chemical synthesis,
Perovskite,
Catalysts
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