无粘结剂LSX分子筛表征及吸附性能

Characterization and adsorption properties of LSX molecular sieve without binder

采用X射线衍射(XRD)、扫描电镜(SEM)和比表面积分析仪(BET)对无粘结剂Na K-LSX分子筛性能进行了表征,并测试了材料的氮气与氧气吸附量。结果表明,型体分子筛中的高岭土转化为X型分子筛,晶化后的无粘结剂Na K-LSX分子筛的微孔比表面积增加了720.985 1 m2/g,经离子交换后,Ca-LSX分子筛的氮气吸附量达到了27 m L/g,Li-LSX分子筛的氮氧分离系数α(N2/O2)为5.95。

The properties of LSX molecular sieve without binder were characterized by using X-ray diffraction（ XRD）,scanning electron microscopy（ SEM） and surface area analyzer（ BET）,moreover,the nitrogen and oxygen adsorption of sample were detected. The results showed that the Kaolin from molecular sieve was transformed into X zeolites,pore specific surface area of Na K-LSX without binder after the crystallization increased by 720. 985 1 m^2/g,the nitrogen adsorption capacity of Ca-LSX molecular sieve reached 27 m L/g after ion exchange,and the nitrogen and oxygen separation coefficient α（ N2/O2） of LiLSX molecular sieve was 5. 95.