粉煤灰无溶剂法合成方钠石新方法及效果验证

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (2): 584-592.

所属专题：资源综合利用

粉煤灰无溶剂法合成方钠石新方法及效果验证

郭威¹, 庞来学¹, 王文超², 张佳丽¹, 王华³, 白书霞¹

1.山东交通学院交通土建工程学院,济南 250357;
2.山东省煤田地质局第五勘探队分析测试中心,济南 250100;
3.山东省产品质量检验研究院,济南 250100

收稿日期:2023-09-12 修订日期:2023-11-09 出版日期:2024-02-15 发布日期:2024-02-05
通信作者: 庞来学,博士,教授。E-mail:lxpang@sdjtu.edu.cn;王文超,高级工程师。E-mail:350236444@qq.com
作者简介:郭威(1999—),男,硕士研究生。主要从事固废合成沸石方面的研究。E-mail:22107049@stu.sdjtu.edu.cn
基金资助:
山东省自然科学基金(ZR2020ME231);山东交通学院2023年研究生科技创新项目(2023YK041)

New Method and Effect Verification for Synthesizing Sodalite from Fly Ash Using Solvent-Free Method

GUO Wei¹, PANG Laixue¹, WANG Wenchao², ZHANG Jiali¹, WANG Hua³, BAI Shuxia¹

1. College of Transportation Civil Engineering, Shandong Jiaotong University, Jinan 250357, China;
2. Center of Forecasting and Analysis of the Fifth Prospecting Team of Shandong Coal Geology Bureau, Jinan 250100, China;
3. Shandong Institute for Product Quality Inspection, Jinan 250100, China

Received:2023-09-12 Revised:2023-11-09 Online:2024-02-15 Published:2024-02-05

摘要/Abstract

摘要： 粉煤灰因具有高硅铝含量、低硅铝比的特性常用来合成低硅纯相方钠石。为提高粉煤灰的高值化利用,以粉煤灰为原料,采用无溶剂法合成方钠石,考察灰碱比、晶化时间和晶化温度对方钠石物相组成、微观结构以及结晶度的影响。结果表明,在灰碱比为1∶0.8(质量比)、晶化时间为9 h、晶化温度为160 ℃的工艺下,可合成类型单一、结晶度高的方钠石,灰碱比对相对结晶度的影响显著。合成的方钠石具有微孔和介孔复合孔结构,其N₂吸附-脱附等温线为典型的IV型等温线,具有III型回滞环。方钠石的铝含量高,具有良好的热稳定性。相较于水热法合成方钠石,本实验方法粉煤灰利用率高,为粉煤灰利用提供了新途径。

关键词: 粉煤灰, 方钠石, 无溶剂法, 合成机理, 孔结构, 热稳定性

Abstract: Due to its high silicon and aluminum content, low silicon and aluminum ratio, fly ash is often used to synthesize low silicon pure phase sodalite. In order to improve the high-value utilization of fly ash, sodalite was synthesized from fly ash using solvent-free method. The effects of ash-alkali ratio, crystallization time and crystallization temperature on sodalite phase formation, microstructure and crystallinity were studied. The results show that crystaline pristine sodalite is prepared from fly ash with ash-alkali ratio of 1∶0.8 (mass ratio), crystallization time of 16 h and crystallization temperature of 160 ℃. The ash-alkali ratio has a significant effect on relative crystallinity. The synthesized sodalite has microporous and mesoporous composite pore structure. The N₂ adsorption-desorption isotherm of sodalite isotherm reveals a typical IV isotherm with a type III hysteresis loop. Sodalite has high aluminum content, and has good thermal stability. Compared with the hydrothermal method for synthesizing sodalite, this experimental method utilizes fly ash with high efficiency, and provides a new way for the utilization of fly ash.

Key words: fly ash, sodalite, solvent-free method, synthetic mechanism, pore structure, thermal stability

中图分类号:

TQ424.25

郭威, 庞来学, 王文超, 张佳丽, 王华, 白书霞. 粉煤灰无溶剂法合成方钠石新方法及效果验证[J]. 硅酸盐通报, 2024, 43(2): 584-592.

GUO Wei, PANG Laixue, WANG Wenchao, ZHANG Jiali, WANG Hua, BAI Shuxia. New Method and Effect Verification for Synthesizing Sodalite from Fly Ash Using Solvent-Free Method[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(2): 584-592.

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粉煤灰无溶剂法合成方钠石新方法及效果验证

New Method and Effect Verification for Synthesizing Sodalite from Fly Ash Using Solvent-Free Method

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