Adsorption of nitrogen and oxygen in cobalt (II)-exchanged zeolite A

文献类型： 外文期刊

第一作者： Wu, Jian

作者： Wu, Jian;Zhu, Jiang;Wang, Yu;Liu, Ruibin;Meng, Changgong;Shang, Yunshuai

作者机构：

关键词： Microporous materials;Chemical synthesis;X-ray diffraction;Surface properties

期刊名称：MATERIALS RESEARCH BULLETIN （ 影响因子：4.641； 五年影响因子：3.538 ）

ISSN： 0025-5408

年卷期： 2010 年 45 卷 9 期

页码：

收录情况： SCI

摘要： The cobalt (II)-exchanged zeolite A (NaCoA) was prepared by cation exchange process with zeolite A (NaA) and Co(NO(3))(2) in aqueous solution. A static volumetric system was employed to evaluate the N(2) and O(2) adsorption properties of NaCoA at 298 K. It was found that the N(2) adsorption capacity of NaCoA increased rapidly with the rising pressure, and the adsorption isotherm of N(2) became nonlinear in low pressure region. The O(2) adsorption capacity of NaCoA increased slightly with pressure. The introduction of Co(2+) into the NaA enhanced the N(2) adsorption capacity and N(2)/O(2) selectivity, which could be contributed to the pi-complexation between N(2) and Co(2+). This strong interaction brought about a series of high value for Henry's constant, Langmuir constant, adsorption selectivity and adsorption capacity of N(2) in NaCoA. Infrared spectra were also carried out to illustrate that the N(2) were bonding with Co(2+). (C) 2010 Elsevier Ltd. All rights reserved.

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