Li-LSX分子筛的离子改性及氧氩吸附分离性能

doi:10.11896/cldb.18070211

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Abstract Aiming at exploring the effect of modified Li-LSX molecular sieves with diverse valence cation on their oxygen-argon adsorption and separation performance, aqueous solution ion exchange process was employed to prepare AgLi-LSX, CaLi-LSX and CeLi-LSX molecular sieves, with Ag⁺, Ca²⁺ and Ce³⁺ as cationic exchange agents, respectively. Then, the framework structure, crystal configuration, element content and pore structure of the modified molecular sieves were characterized by SEM, TEM, FT-IR, XRD, EDS, Raman and BET technique, and the oxygen-argon adsorption and separation performance of the modified molecular sieves were measured as well. The results indicated that the modified molecular sieves held the same framework structure and crystal configuration with the original molecular sieve, still showing X type. The adsorption amounts of the modified sieves on the oxygen and argon were measured under 25 ℃. As could be seen from the results, CeLi-LSX, CaLi-LSX, AgLi-LSX molecular sieves showed the oxygen adsorption amounts of 4.978 6 mL·g^-1, 4.042 7 mL·g^-1, 2.975 5 mL·g^-1, respectively, and similar argon adsorption ability. It can be concluded that CeLi-LSX molecular sieve is a favorable materials for oxygen-argon adsorption and separation.

Key words： Li-LSX AgLi-LSX CaLi-LSX CeLi-LSX ion modification oxygen-argon adsorption separation

Published: 29 October 2019

CLC number:

TQ174

Fund:This work was financially supported by the Special Project of Military Medical Innovation(16CXZ038) and National Key Research and Development Plan (2017YFC0806403)

About author:: Fubang Yang,postgraduate, majored in chemical engineering, Academy of Chemical and Materials, Tianjin University of Science and Technology, research direction is functional material;Cheng Deng received his B.E. degree in materials science and engineering from Sichuan University, and obtained Master and Ph.D. degrees in materials science and engineering from the National University of Defense Technology in Sep. 2003—Jan. 2010. He was appointed to the faculty upon graduation, and is currently an associate researcher of the Academy of Military Science of Chinese PLA. He has published more than 30 journal papers as the first author and authorized 21 national invention patents. His research interests focus on the fundamental theory & application about the inorganic functional membrane materials and water treatment technology. At present, he is the Youth Expert Committee Member of Chinese Society of Seawater Desalination and Water Reuse, and is also a reviewer of several academic journals;Jun Ma is a senior engineer in the Institute of Medical Support Technology, Academy of Military Science. He is mainly engaged in study of separation engineering technology and equipment, especially in development and application of preparation technology and key components in oxygen generation and water treatment. In recent years, he has managed and participated more than 10 army and Tianjin major projects, published 20 journal papers, owned more than 20 national patents. A number of equipments developed under his efforts have been widely used.

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Cite this article:

YANG Fubang,DENG Cheng,DENG Yu, et al. Ion Modification and Oxygen-argon Adsorption Separation Performance of Li-LSX Molecular Sieves[J]. Materials Reports, 2019, 33(24): 4051-4055.

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http://www.mater-rep.com/EN/10.11896/cldb.18070211 OR http://www.mater-rep.com/EN/Y2019/V33/I24/4051

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