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沸石分子筛对甲醛气体吸附性能的研究
引用本文:王国庆,孙剑平,吴锋,陈实.沸石分子筛对甲醛气体吸附性能的研究[J].北京理工大学学报,2006,26(7):643-646.
作者姓名:王国庆  孙剑平  吴锋  陈实
作者单位:北京理工大学,化工与环境学院,北京,100081
摘    要:对5A,ZSM-5,10X,13X型沸石分子筛吸附甲醛的性能进行了研究,发现10X沸石对甲醛的吸附量较高,穿透时间延长. 用低温氮气(77.4 K)吸附法测定了各样品吸附等温线,用密度函数理论计算出各样品的孔径分布. 推知沸石的孔径和沸石骨架中的阳离子对提高甲醛的吸附性能起了主要作用. 分析了浓度对吸附效果的影响和10X分子筛活化后重复使用的情况. 结果表明10X沸石对4 mg/m3的低浓度甲醛气体在较长时间内去除效率在90%以上;重新活化后,仍有良好的吸附能力,可以重复使用.

关 键 词:沸石  甲醛  吸附  沸石分子筛  甲醛气体  吸附性能  研究  Zeolites  Formaldehyde  吸附能力  重新活化  去除效率  长时间  结果  情况  使用  影响  吸附效果  浓度  分析  作用  离子对  骨架
文章编号:1001-0645(2006)07-0643-04
收稿时间:11 17 2005 12:00AM
修稿时间:2005年11月17日

Adsorption Behevior of Formaldehyde on Zeolites
WANG Guo-qing,SUN Jian-ping,WU Feng and CHEN Shi.Adsorption Behevior of Formaldehyde on Zeolites[J].Journal of Beijing Institute of Technology(Natural Science Edition),2006,26(7):643-646.
Authors:WANG Guo-qing  SUN Jian-ping  WU Feng and CHEN Shi
Institution:School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China
Abstract:Adsorption of formaldehyde on 5A,ZSM-5,10X,13X zeolites were investigated and compared.Results indicated that 10X zeolite had a significant increase in the adsorption capacities and prolongation of breakthrough time upon the removal of formaldehyde.The porous structure parameters of the samples under study were investigated using nitrogen adsorption at a low temperature of 77.4?K.Pore size distribution of the samples under study were calculated by density functional theory.With the aid of these analyses,relationship between the structure and cations on the molecular sieve framework and the adsorption properties of zeolites in removing formaldehyde was revealed.The effect of formaldehyde concentration and the adsorption capacity of 10X zeolite used in adsorption were also studied.The results indicated that a removal rate of 4?mg/m~3 of formaldehyde can reached 90% and can be reused.
Keywords:zeolite  formaldehyde  adsorption
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