疏水改性ZSM-5吸附剂吸附CO_2研究  

Research on CO_2 Adsorption Characteristics of Hydrophobic ZSM-5 Adsorbent

作　　者：王喜芹[1] 李凯[1] 栾志强[1] 叶平伟[1] 

机构地区：[1]防化研究院,北京100191

出　　处：《中国空间科学技术》2012年第2期17-21,共5页Chinese Space Science and Technology

基　　金：国家863计划(2006AA06A310)资助项目

摘　　要：传统方法采用5A沸石分子筛控制航天器舱内CO2浓度,因沸石与水蒸气的亲和力较大,在高湿度条件下将导致CO2吸附的失效。通过ZSM-5分子筛与无机硅粘结剂、助剂和水混合成面团状后挤压成形、干燥、焙烧,制备了一种分子筛吸附剂,经水蒸气/酸洗,疏水改性处理后,通过低温N2吸脱附、H2O/CO2吸附等温线、XRD等手段进行表征和评价。结果表明,所制备的疏水分子筛吸附剂比表面积达296m2/g,CO2的吸附性能略有提高,且疏水性优良,在90%相对湿度下吸水率只有约1%。The traditional CO2 removal method with 5A zeolite molecular sieve will lose efficacy because of the strong affinity with the water vapor. A hydrophobic ZSM-5 adsorbent was prepared by a mixture of ZSM-5, silica sol, water and additives, followed by processes of extrusion, drying and then hydrophobic modification. The structures and properties of the adsorbent were analyzed by N2, H2O/CO2 adsorption isotherms and XRD analysis methods. The prepared adsorbent has multilevel pore structure, high BET specific surface area （296m^2/g） and better CO2 adsorption performance, as well as excellent hydrophobicity, and the H20 equilibrium adsorption capacity is about 1% of weight even under the condition of 90% relative humidity.

关 键 词：沸石 分子筛 吸附剂 疏水改性 载人航天 

分 类 号：TQ116.14[化学工程—无机化工]