170296 20260410165451.0 doi 10.1016/j.surfin.2026.108989 sideral 148835 ART-2026-148835 eng Güemes, Lucas Universidad de Zaragoza Gaining insight into the synthesis of nanosized pure zeolite NaA 2026 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. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA/T68-23R info:eu-repo/grantAgreement/ES/MICIU/CEX2023-001286-S info:eu-repo/grantAgreement/ES/MICIU/PID2022-138582OB-I00 info:eu-repo/semantics/openAccess by-nc https://creativecommons.org/licenses/by-nc/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Coronas, Joaquín Universidad de Zaragoza (orcid)0000-0003-1512-4500 Téllez, Carlos Universidad de Zaragoza (orcid)0000-0002-4954-1188 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 87 (2026), 108989 [12 pp.] Surfaces and Interfaces 2468-0230 8253233 http://zaguan.unizar.es/record/170296/files/texto_completo.pdf Versión publicada 2773180 http://zaguan.unizar.es/record/170296/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:170296 articulos driver 2026-04-10-13:46:04 ARTICLE