碱活化条件对粉煤灰合成不同类型沸石的影响

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Influence of Alkali’s Activation on the Types of Zeolite Synthesized from Fly Ash

MA Ming-yan¹, ZHANG Dong-li¹, WANG Yu-jie²,HU Da-qiang¹, ZHU Huai-zhi¹, JIANG Yin-shan¹

1.College of Material Science and Engineering，Changchun 130026，China；2.The Center of Test and Science Experiment, Jilin University, Changchun 130026, China

Received:2005-11-14 Revised:1900-01-01 Online:2006-07-26 Published:2006-07-26
Contact: JIANG Yin-shan

Abstract

Abstract: Zeolite Y, P and HS were synthesized hydrothermally from flyash which has a higher SiO₂/Al₂O₃ ratio. The influence of alkali’s activation conditions, including baking method, alkalinity and NaOH/flyash mass ratio on synthetic zeolite was investigated. XRD analysis shows that the type, granularity and relative content of synthetic zeolite were affected by these factors. Baking in a short time twice at 620℃ can improve activation effect. And zeolite P was synthesized in lower alkalinity and NaOH/flyash mass ratio condition, while zeolite HS was synthesized in higher alkalinity and NaOH/flyash mass ratio condition. The synthetic condition of zeolite Y was between them. The synthetic products have high crystallinity, purity and cation exchange capability.

Key words: fly-ash, zeolite, alkali activation, granularity, cation exchange capability

CLC Number:

P619.217

MA Ming-yan, ZHANG Dong-li, WANG Yu-jie,HU Da-qiang, ZHU Huai-zhi, JIANG Yin-shan. Influence of Alkali’s Activation on the Types of Zeolite Synthesized from Fly Ash[J].J4, 2006, 36(04): 663-667.

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Influence of Alkali’s Activation on the Types of Zeolite Synthesized from Fly Ash

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