沸石分子筛的CO2除杂性能  

CO_2 removal by zeolite molecular sieves

作　　者：龙斌[1,2] 李君利[1] 王群书[2] 冯淑娟[2] 周国庆[2] 冯天成[2] 张洋[2] 徐明[2] 田言杰[2] 马怀成[2] 

机构地区：[1]清华大学工程物理系,粒子技术与辐射成像教育部重点实验室,北京100084 [2]西北核技术研究所,西安710024

出　　处：《清华大学学报（自然科学版）》2016年第8期824-829,共6页Journal of Tsinghua University(Science and Technology)

摘　　要：放射性氙测量通常采用碳分子筛等吸附剂进行吸附分离以提高探测灵敏度,但空气中CO_2的存在会降低吸附剂的吸附性能,同时增大吸附柱的体积、降低气体回收率,因此在氙吸附前需要去除空气中的CO_2。该文研究了不同的沸石分子筛的CO_2除杂性能,测试分析了不同操作条件对除杂性能的影响。结果表明：13XHP沸石分子筛对CO_2的除杂性能较好,温度和CO_2的体积分数对吸附剂性能的影响最为显著,柱前压力和气体流量分别在103~353kPa和564~2 015mL/min的范围内对吸附剂性能影响不大。Adsorption and separation by carbon molecular sieves is improves the detection sensitivity of radio xenon measurements. However, the adsorption capability including the adsorption column volume and the gas recovery are influenced by the CO2 in the air. Therefore, the CO2 must be removed before the xenon adsorption. This study analyzed CO2 removal by zeolite molecular sieves for various operating conditions. The results show that the 13XHP zeolite molecular sieve more effectively removes CO2 than the other adsorbents and that the CO2 temperature and volume fraction are the most important of fact affecting the adsorption performances. The inlet pressure and flow rate have less effect on the adsorption of CO2 by 13XHP for how rates of 564 -2 015 mL/min and pressures of 103-353 kPa.

关 键 词：沸石分子筛 CO2 除杂性能 

分 类 号：X837[环境科学与工程—环境工程]