蜂窝状ZSM-5型分子筛对丙酮和丁酮吸附性能研究  

Adsorption Characteristics of Acetone and Butanone onto Honeycomb ZSM-5 Molecular Sieve

作　　者：杜娟[1] 栾志强[2] 解强[1] 叶平伟[2] 李凯[2] 王喜芹[2] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]防化研究院,北京100191

出　　处：《环境科学》2013年第12期4706-4711,共6页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(2012AA063101)

摘　　要：测定了蜂窝状ZSM-5型分子筛(honeycomb ZSM-5 molecular sieve)对丙酮以及丙酮和丁酮双组分体系的吸附性能,考察了相对湿度、浓度、气流比速等对其吸附性能的影响,并由Wheeler方程计算了相关的吸附性能参数.结果表明,气流相对湿度对丙酮的吸附性能无明显影响,该材料具有良好的疏水能力;在低浓度范围内,该材料对丙酮的动态饱和吸附容量随浓度的提高而增加,但在高浓度范围内(>9 mg·L-1),其动态饱和吸附容量维持在一定的水平上不再增加;利用其对丙酮和丁酮吸附能力的差异,该材料可以用于丙酮和丁酮的吸附分离.Adsorption capacity of acetone and acetone-butanone mixture onto honeycomb ZSM-5 molecular sieve was measured in this paper, and the influences of relative humidity, initial adsorbate concentration and airflow velocity on the adsorption process were investigated. Besides, adsorption performance parameters were calculated by Wheeler＇s equation. The results showed that relative humidity had no obvious influence on the acetone adsorption performance, which suggests that this material has good hydrophobic ability; in the low concentration range, the dynamic saturated adsorption capacity of acetone increased with the increase of initial concentration, but in the occasion of high concentration of acetone gas （ more than 9 mg ~ L-~ ） , the dynamic saturated adsorption capacity maintained at a certain level and did not vary with the increase of initial concentration ; the increase of air flow velocity resulted in significant increase of acetone adsorption rate constant, at the same time the critical layer thickness of the adsorbent bed also increased significantly. In the cases of acetone-butanone mixture, the adsorption capacity of butanone onto ZSM-5 was clearly higher than that of acetone.

关 键 词：蜂窝状ZSM-5型分子筛 吸附 丙酮 丁酮 穿透曲线 Wheeler方程 

分 类 号：X51[环境科学与工程—环境工程]