改性颗粒活性炭吸附低浓度甲醛的试验研究  

Experimental Study on Low Concentration Formaldehyde Adsorption by Modified Granular Activated Carbons

作　　者：柳萌 王金娥[2] 

机构地区：[1]北京纬纶华业环保科技股份有限公司,北京100083 [2]北京航空航天大学环境科学与工程系,北京100191

出　　处：《安全与环境工程》2012年第5期20-23,共4页Safety and Environmental Engineering

摘　　要：通过试验研究了表面改性方法、焙烧气氛和气相水分对颗粒活性炭(GAC)吸附低浓度甲醛性能的影响。结果表明:3%HNO3浸泡改性可增加GAC表面的含氧官能团,显著改善GAC对甲醛的吸附性能,并延长吸附穿透时间;O2气氛下焙烧所得GAC的吸附效果优于N2气氛下焙烧的GAC;反应气体含水1.5%时,GAC对甲醛的吸附性能明显降低。另外,分别采用低温N2吸附法和傅立叶红外光谱法表征了3%NHO3浸泡改性前、后GAC的孔结构和孔表面化学性质的差别,从而揭示了GAC的吸附性能与孔结构、孔表面化学性质之间的关系。The impacts of surface modification methods, calcination atmosphere and the addition of water vapor on the adsorption of low concentration formaldehyde by granular activated carbon （GAC） are experi- mentally investigated. The adsorption capacities and breakthrough time of GAC impregnated in 3% HNO3 are significantly improved, because the modifier increases oxygen functional groups. The adsorption capaci- ty of GAC calcinated in O2 is much higher than that caleinated in N2. The adsorption capacity of GAC de- creases when 1.5% water is fed into the reaction gases. The pore structure parameters and pore surface chemistry of GAC before and after 3 % HNO3 modification are represented by standard nitrogen adsorption and Fourier transform infrared spectra （FTIR）,respectively. The relationship between the adsorption ca- pacity, pore structure and pore surface chemistry is revealed.

关 键 词：颗粒活性炭(GAC) 低浓度甲醛 表面改性 焙烧气氛 气相水分 吸附试验 

分 类 号：X51[环境科学与工程—环境工程] TQ424.1[化学工程]