Study on Using Chenghe Fly Ash to Prepare 4A Molecular Sieve

Abstract:

In recent years, with the rapid development of coal industry, a large number of coal fly ash has been produced, while the recycling rate of the ash is rather low. It is not only a waste of the precious land resources, but also makes environment suffering severe pollution. As an important kind of new material in the national economy, the demand for molecular sieve is growing. It is possible to synthesis molecular sieve using fly ash. The way is not only energy conservation and environmental protection, but also waste reclamation, according with the theme of the sustainable development.This study is to synthesize the molecular sieve with guide agent by the method of hydrothermal synthesis using Cheng He mining area in Shanxi province, which is on the basis of the analysis of chemical composition of fly ash. It is also to find a approach for the use of fly ash with subtly. Through XRD expert zing phase, SEM observing appearance, the characterizing results show that excellent performance molecular sieve of 4A can be synthesized at conditions: Calcined at 850°C and for 2 hours, then hydrothermal reacted with composition of reaction mixture 3Na₂O:1Al₂O₃:2SiO₂: 185H₂O at temperature 90°C, crystallization time 6h with 5% guide agent.

• Periodical: Advanced Materials Research (Volumes 1120-1121)
• Pages: 137-140
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.137
• Online since: July 2015
• Authors: Jian Li Yang, Mei Li Du, Tian Qin Zang
• Keywords: Citric Acid, Fly Ash, Guide Agent, Molecular Sieve

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