Files
Document type
ArticleVersion
Published versionPublication date
Publication license
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/175879
Improvement in the synthesis conditions and characterizations of the zeolite Li-A(BW) obtained from a kaolinitic rock
Journal Title
Director/Tutor
Journal ISSN
Volume Title
Related resource
Abstract
Crystallization of zeolite Li-A(BW) from kaolinite (Standard Porcelain by the IMERYS Minerals Ltd) through a conventional hydrothermal treatment is here achieved for the first time with no additives as reported in the literature. Moreover lower kaolin calcination temperatures and lower synthesis temperatures are tested and verified in this work. The synthesis process is rather simple as the reaction of kaolinite with alkali occurs very readily after calcination of at 650 °C. Metakaolin is mixed with calculated amount of aluminum hydroxide and lithium hydroxide and the experiment is performed at ambient pressure and 180 ± 0.1 °C. Li-A(BW) is characterized by powder X-ray diffraction, high temperature X-ray diffraction, scanning electron microscopy, inductively coupled plasma optical emission spectrometry, thermal analysis and infrared spectroscopy. Calculation of cell parameters (through Rietveld Refinement) and density, specific surface and pore size are also achieved. The amount of amorphous phase in the synthesis powders is estimated with quantitative phase analysis using the combined Rietveld and reference intensity ratio methods. The results become notably attractive in view of a possible industrial transfer of the synthesis protocol.
Subject (English)
Citation
Citation
NOVEMBRE, Daniela, GIMENO TORRENTE, Domingo and DEL VECCHIO, A. Improvement in the synthesis conditions and characterizations of the zeolite Li-A(BW) obtained from a kaolinitic rock. Scientific Reports. 2020. Vol. 10, num. 5715, pags. 1-9. ISSN 2045-2322. [consulted: 16 of August of 2026]. Available at: https://hdl.handle.net/2445/175879