活性氧化铝复合材料在空气净化器中对甲醛的降解性能

Activated Alumina Composite Applied in Air Purifier for the Degradation of Formaldehyde

针对空气净化器越来越普及,空气净化器中填充的空气净化材料越来越多样性的问题,选取商品活性氧化铝作为载体,使用除甲醛活性剂进行改性,按照GB/T18801-2015(空气净化器)进行测试,并与某商品活性碳和多孔矿晶复合材料进行对比,对相关参数进行计算,此外,还对复合材料进行高浓度的连续测试,并用压汞法对材料的孔径进行分析。结果表明:在标准测试中,未经除甲醛活性剂改性的活性氧化铝,净化能效低,按照净化能效评级均为不合格,经过除甲醛活性剂改性后,净化能效超过了活性碳,活性氧化铝复合材料的能效等级达到了高效级。在高浓度连续测试中,活性氧化铝复合材料略占优势,重新活化后的活性氧化铝复合材料仍能保持较好的甲醛去除率。在不同除甲醛活性剂浓度下,活性氧化铝复合材料受浓度影响不大,压汞分析结果表明活性氧化铝有更宽的孔径分布。原料容易获得,简单的加工工艺和优良的催化性能为其在空气净化器中的应用提供了可能性。

For the population of the air purifier, diversity of purification materials are applicable to it. Activated alumina was selected as the carrier, and modified with formaldehyde scavenger. The test was according to the Chinese national standard GB/TI8801-2015 （air purifier）. The results were compared with the activated carbon and porous mineral crystal composite, and the relevant data was calculated. In addition, there is a test for higher concentration of formaldehyde, and analyzed the pore distribution with mercury intrusion method. In the standard experiment, the purification efficiency is low without formaldehyde scavenger, which is unqualified according to the national standard. But after modified with formaldehyde scavenger, the purification efficiency is the highest of all test materials, which can reach the high level according to the national standard. In the continuous experiment with higher concentration of formaldehyde, the activated alumina composite also better than others. The active alumina composite can still maintain high efficiency revitalized again. There is not obvious influence when concentration of formaldehyde scavenger was changed. Mercury intrusion analysis showed that there is wider pore size distribution of active alumina. Low-cost raw material, simple processing, renewable ability and excellent performance offered great possibility for its application in air purifier.