Effects of step-change of synthesis temperature on synthesis of zeolite 4A from coal fly ash

Hui, K. S. and Chao, C. Y. H. (2006) Effects of step-change of synthesis temperature on synthesis of zeolite 4A from coal fly ash. Microporous and Mesoporous Materials, 88 (1-3). pp. 145-151. ISSN 1387-1811

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Abstract

Pure form, single phase and high crystalline zeolite 4A samples were synthesized by applying step-change of synthesis temperature during hydrothermal treatment of coal fly ash prepared solution. The results indicate that step-change of synthesis temperature during hydrothermal treatment plays an important role in reducing the overall synthesis time while maintaining a high degree of crystallinity for the samples. In order to obtain similar quality of zeolite 4A sample, a reduction by half of the total synthesis time could be achieved by applying step-change of synthesis temperature compared to using constant temperature throughout the synthesis process. Generally, the crystallinity of the synthesized zeolite 4A samples was in the range of 75-87%. The yielding (quantity) of pure zeolite 4A samples obtained in all the experiments was about 15-18%. In addition, crystals of smaller particle size existing in a narrower particle size distribution were synthesized.

Item Type: Article
Additional Information: Date of Acceptance: 16/09/2005
Uncontrolled Keywords: coal fly ash,synthesis,temperature,zeolite 4a
Faculty \ School: Faculty of Science > School of Mathematics
Related URLs:
Depositing User: Pure Connector
Date Deposited: 04 Oct 2016 13:01
Last Modified: 25 Jul 2018 12:43
URI: https://ueaeprints.uea.ac.uk/id/eprint/60675
DOI: 10.1016/j.micromeso.2005.09.005

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