›› 2019, Vol. 21 ›› Issue (1): 1-6.

• Review • 上一篇    下一篇

X型分子筛在吸附中的应用研究进展

王玉冰1,王辉国2   

  1. 1. 中国石化物资装备部
    2. 中国石化石油化工科学研究院
  • 收稿日期:2018-12-17 修回日期:2018-08-15 出版日期:2019-03-30 发布日期:2019-03-30
  • 通讯作者: 王辉国 E-mail:wanghg.ripp@sinopec.com

Progress in the Application of X Zeolite in Adsorption

Wang Yubing,Wang Huiguo   

  • Received:2018-12-17 Revised:2018-08-15 Online:2019-03-30 Published:2019-03-30
  • Contact: Wang Huiguo E-mail:wanghg.ripp@sinopec.com

摘要: 综述了X型分子筛在对二甲苯吸附分离、N2/O2分离等领域中的应用,骨架硅铝比、阳离子种类、含水量等均会对其吸附选择性、吸附容量产生显著影响。作为对二甲苯吸附分离吸附剂的活性组分,X型分子筛的硅铝比为2.2~2.4、阳离子为Ba2+和K+、含水量为4.0%~5.0%时具有较高的对二甲苯吸附选择性。对于N2/O2分离,硅铝比为2.0、阳离子为Li+的X型分子筛表现出较高的N2吸附容量和N2/O2分离系数,通过引入第二种阳离子还可进一步提高其N2/O2分离系数,但是H2O的吸附会显著降低其N2吸附容量。此外,X型分子筛还可用于高纯He的吸附分离,以及CO2、CO、CH4、N2、Ar、H2的选择性吸附。

关键词: FAU, 对二甲苯, 分离, 选择性

Abstract: The application of X zeolite in the areas for producing para-xylene by adsorptive separation, N2/O2 separation, etc., was reviewed, and the framework SiO2/Al2O3 molar ratio, the cations and the water content of X zeolite significantly affected its selectivity and capacity. As the active component of para-xylene adsorbent, the X zeolite with a framework SiO2/Al2O3 molar ratio of 2.2—2.4 coupled with cations of Ba2+ and K+, as well as a water content of 4.0%—5.0% exhibited higher para-xylene selectivity. For N2/O2 separation, higher N2 capacity and N2/O2 separation factor were achieved when the X zeolite had a framework SiO2/Al2O3 molar ratio of 2.0 coupled with Li+ cations. The introduction of another cation in X zeolite could further increase the N2/O2 separation factor, while the adsorption of water, however, could lead to a remarkable decrease of N2 capacity. Besides, the X zeolite could be used in adsorptive separation of highly pure He and selective adsorption of CO2, CO, CH4, N2, Ar, and H2.

Key words: FAU, para-xylene, separation, selectivity