Gaining insight into the synthesis of nanosized pure zeolite NaA

Güemes, Lucas (Universidad de Zaragoza) ; Coronas, Joaquín (Universidad de Zaragoza) ; Téllez, Carlos (Universidad de Zaragoza)

Resumen: In zeolite synthesis, controlling and reducing the particle size is advantageous for different processes in which mass transfer occurs through surface active sites. In this work, the hydrothermal synthesis of zeolite NaA has
been studied in detail seeking to control the size, morphology and crystal phase of the resulting zeolite particles. Adjusting the crystallization conditions and molar composition of a SiO2-Al2O3-TMA2O-Na2O-H2O system allows
for the consistent production of zeolite NaA with a particle size down to 68 nm measured by TEM, using tetramethylammonium (TMA) as the organic structure directing agent (OSDA). Within the composition region in which the LTA zeolite crystallization is favored, syntheses at higher OSDA/Na+ and Si/Al atomic ratios produce smaller particles. Depending on the synthesis gel molar formulation, different morphologies and sizes of LTA crystals (in the ~68–760 nm range) with slightly distinct Si/Al atomic ratios (in the 1.1–2.3 range) can be achieved. The synthesized zeolites were characterized in detail by different techniques, and their textural properties were evaluated through CO2 and N2 adsorption and correlated with their composition.

Idioma: Inglés

DOI: 10.1016/j.surfin.2026.108989

Año: 2026

Publicado en: Surfaces and Interfaces 87 (2026), 108989 [12 pp.]
ISSN: 2468-0230

Financiación: info:eu-repo/grantAgreement/ES/DGA/T68-23R
Financiación: info:eu-repo/grantAgreement/ES/MICIU/CEX2023-001286-S
Financiación: info:eu-repo/grantAgreement/ES/MICIU/PID2022-138582OB-I00

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)