粉煤灰基多孔地聚物的结构及过滤性能

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (6): 2081-2091.

所属专题：资源综合利用

粉煤灰基多孔地聚物的结构及过滤性能

陈曦平¹, 王诏田¹, 罗洪杰^1,2, 程岩¹, 吴林丽¹, 姜昊³

1.东北大学冶金学院,沈阳 110819;
2.材料先进制备技术教育部工程研究中心,沈阳 110819;
3.抚顺天成环保科技有限公司,抚顺 113001

收稿日期:2023-03-30 修订日期:2023-03-30 出版日期:2023-06-15 发布日期:2023-06-25
通信作者: 罗洪杰,博士,教授。E-mail:neuhjluo@sina.com
作者简介:陈曦平(1998—),男,硕士研究生。主要从事新型无机多孔过滤材料方面的研究。E-mail:2092814323@qq.com
基金资助:
国家自然科学基金面上项目(51874093);内蒙古2020科技创新引导项目(NMGKJCX202007);内蒙古2018“草原英才”引领项目;徐州市2022科技成果转化项目(KC22450)

Structure and Filtration Performance of Fly Ash-Based Porous Geopolymer

CHEN Xiping¹, WANG Zhaotian¹, LUO Hongjie^1,2, CHENG Yan¹, WU Linli¹, JIANG Hao³

1. School of Metallurgy, Northeastern University, Shenyang 110819, China;
2. Engineering Research Center of Advanced Materials Preparing Technology, Ministry of Education, Shenyang 110819, China;
3. Tiancheng Environmental Protection Technology Co., Ltd., Fushun 113001, China

Received:2023-03-30 Revised:2023-03-30 Online:2023-06-15 Published:2023-06-25

摘要/Abstract

摘要： 目前,工业除尘滤袋的工作温度不高于280 ℃,通常在过滤前需先将高温烟气进行降温处理。为了制备高效且耐温性良好的新型过滤材料,本文以粉煤灰为主要原料,以H₂O₂为发泡剂,通过聚合反应制备了多孔地聚物,并对其形貌、孔结构、抗折强度和过滤性能进行了表征。结果表明:H₂O₂的最佳添加量为0.98％(质量分数),此时多孔地聚物下表面与内部的平均孔径分别为17.3和171.5 μm,孔隙率为56.2％,常温下抗折强度为2.2 MPa,过滤阻力为6.2×10^-3 MPa,对PM10和PM2.5的过滤效率分别为98.2％和93.3％,经800 ℃的热处理后,抗折强度增加到3.4 MPa,对PM10和PM2.5的过滤效率均保持在90％以上,过滤阻力增加了1×10^-3 MPa。因此,以粉煤灰基多孔地聚物作为高温烟气过滤材料具有良好的应用前景。

关键词: 粉煤灰, 多孔地聚物, 高温处理, 过滤性能, 孔结构, 抗折强度

Abstract: At present, the working temperature of industrial dust removal filter bag is not higher than 280 ℃. The high temperature flue gas needs to be cooled before filtration. In order to prepare a new type of filter material with high efficiency and good temperature resistance, porous geopolymer was preparedby polymerization reaction with fly ash as the main raw material and H₂O₂ as foaming agent. The morphology, pore structure, flexural strength and filtration performance were characterized. The results show that the optimum addition of H₂O₂ is 0.98%(mass fraction). The average pore diameters of the lower surface and the interior of the porous geopolymer are 17.3 and 171.5 μm respectively, the porosity is 56.2%, the flexural strength at room temperature is 2.2 MPa, the filtration resistance is 6.2×10^-3 MPa, and the filtration efficiency of PM10 and PM2.5 are 98.2% and 93.3%, respectively. After heat treatment at 800 ℃, the flexural strength increases to 3.4 MPa, and the filtration efficiency of PM10 and PM2.5 remains above 90%. The filtration resistance increases by 1×10^-3 MPa. Therefore, the fly ash-based porous geopolymer has a good application prospect as a high-temperature flue gas filtration material.

Key words: fly ash, porous geopolymer, high temperature treatment, filtering performance, pore structure, flexural strength

中图分类号:

TB321

陈曦平, 王诏田, 罗洪杰, 程岩, 吴林丽, 姜昊. 粉煤灰基多孔地聚物的结构及过滤性能[J]. 硅酸盐通报, 2023, 42(6): 2081-2091.

CHEN Xiping, WANG Zhaotian, LUO Hongjie, CHENG Yan, WU Linli, JIANG Hao. Structure and Filtration Performance of Fly Ash-Based Porous Geopolymer[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(6): 2081-2091.

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粉煤灰基多孔地聚物的结构及过滤性能

Structure and Filtration Performance of Fly Ash-Based Porous Geopolymer

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