Efecto de la presencia simultánea de cationes sodio y potasio sobre la síntesis hidrotermal de la zeolita MCM-22

Autores/as

DOI:

https://doi.org/10.33448/rsd-v10i14.21744

Palabras clave:

Zeolita; Síntesis hidrotermal; MCM-22; Cationes alcalinos.

Resumen

La síntesis hidrotermal de la zeolita MCM-22 se investigó en sistemas de reacción que contenían diferentes proporciones de cationes de sodio y potasio. El contenido de potasio R, definido como la relación molar entre la cantidad de potasio y los cationes inorgánicos totales en la mezcla de reacción, varió entre 0 y 0,9, manteniendo constante la concentración catiónica y la alcalinidad de las mezclas de reacción. Los materiales se caracterizaron por difracción de rayos X (DRX), adsorción/desorción física de N2 y microscopía electrónica de barrido (MEB). Los iones K+ favorecieron la formación de MCM-22 cuando el 45% del sodio fue reemplazado por potasio, reduciendo el tiempo necesario para sintetizar el precursor MCM-22(P) y produciendo muestras más cristalinas. Además, la cantidad relativa de iones de Na+ y K+ afectó significativamente la morfología y el tamaño de partícula de las muestras. El uso de mayores contenidos de potasio (R = 0,68 - 0,9) inhibió la cristalización de la zeolita MCM-22. Por tanto, el uso de mezclas de reacción con proporciones adecuadas de Na+ y K+ puede representar una estrategia eficaz para producir muestras altamente cristalinas en tiempos más cortos, reduciendo el costo de síntesis de esta zeolita.

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Publicado

30/10/2021

Cómo citar

QUINTELA, P. H. L.; LIMA, W. S.; SILVA, B. J. B. da; SILVA, A. O. S. da; RODRIGUES, M. G. F. Efecto de la presencia simultánea de cationes sodio y potasio sobre la síntesis hidrotermal de la zeolita MCM-22. Research, Society and Development, [S. l.], v. 10, n. 14, p. e192101421744, 2021. DOI: 10.33448/rsd-v10i14.21744. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/21744. Acesso em: 4 dic. 2024.

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Sección

Ingenierías