CIESC Journal ›› 2021, Vol. 72 ›› Issue (1): 14-26.DOI: 10.11949/0438-1157.20200863

• Reviews and monographs • Previous Articles     Next Articles

Advancements in adsorption separation of Xe/Kr noble gases

CHEN Rundao1(),ZHENG Fang1,GUO Lidong1,YANG Qiwei1,2,ZHANG Zhiguo1,2,YANG Yiwen1,2,REN Qilong1,2,BAO Zongbi1,2()   

  1. 1.College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering, Ministry of Education, Zhejiang University, Hangzhou 310027, Zhejiang, China
    2.Institute of Zhejiang University-Quzhou, Quzhou 324000, Zhejiang, China
  • Received:2020-07-01 Revised:2020-07-16 Online:2021-01-05 Published:2021-01-05
  • Contact: BAO Zongbi

稀有气体Xe/Kr吸附分离研究进展

陈润道1(),郑芳1,郭立东1,杨启炜1,2,张治国1,2,杨亦文1,2,任其龙1,2,鲍宗必1,2()   

  1. 1.浙江大学化学工程与生物工程学院,生物质化工教育部重点实验室,浙江 杭州 310027
    2.浙江大学衢州研究院,浙江 衢州 324000
  • 通讯作者: 鲍宗必
  • 作者简介:陈润道(1998—),男,博士研究生,chenrundao@zju.edu.cn
  • 基金资助:
    国家自然科学基金项目(21722609)

Abstract:

The efficient capture and separation of noble gas Xe/Kr is one of the important separation processes in the gas industry, nuclear environment monitoring, and spent fuel treatment. Xenon and krypton have similar molecular size and polarizability, thus the industrial Xe/Kr separation relies on the energy-intensive cryogenic distillation based on minor difference in boiling point. Adsorption separation is a promising alternative technology. The novel solid porous materials with structural diversity and designability, represented by metal-organic frameworks (MOFs), show great potential in the Xe/Kr adsorption application. The minor difference between xenon and krypton can be accurately discriminated by adjusting the polar pore surface chemistry and pore aperture of MOF materials. In this review, recent advancement in the novel adsorbents for the adsorption separation of xenon and krypton were summarized. The effect of pore surface polarity, pore structure, framework flexibility on the Xe/Kr separation performance were discussed. The current challenges and perspective of MOF materials for Xe/Kr separation were pointed out.

Key words: metal-organic frameworks, adsorption separation, noble gas, xenon, krypton

摘要:

稀有气体Xe/Kr的高效捕集分离是气体工业、核环境监测和乏燃料处理等领域的重要分离过程之一。氙与氪结构与极化率相似,传统低温精馏方法借助氙与氪的沸点差异实现二者分离,能耗巨大,吸附分离是较为理想的替代分离技术。以金属有机框架材料为代表的新型多孔材料具有结构多样性与高度可设计性,通过调节材料微孔表面的极化环境与孔道窗口结构,借助氙与氪极化率的微小差异,可实现对二者的精准辨识,有良好的吸附分离性能与应用前景。重点综述了金属有机框架材料在氙氪分离中的研究进展,归纳了材料的极化环境、孔道结构、框架柔性等因素对氙氪吸附分离性能的影响规律,探讨了金属有机框架材料在氙氪吸附分离研究中存在的问题和局限,并对未来发展方向进行了展望。

关键词: 金属有机框架材料, 吸附分离, 稀有气体, 氙,

CLC Number: