个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:中科院金属所
学位:博士
所在单位:化工学院
学科:无机化学
办公地点:大连理工大学化学楼401
联系方式:13940825088
电子邮箱:cgmeng@dlut.edu.cn
Study on adsorption of N-2 and O-2 by magnesium (II)-exchanged zeolite A
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论文类型:期刊论文
发表时间:2009-06-10
发表刊物:JOURNAL OF ALLOYS AND COMPOUNDS
收录刊物:SCIE、EI、Scopus
卷号:478
期号:1-2
页面范围:L5-L7
ISSN号:0925-8388
关键字:Inorganic materials; Chemical synthesis; Liquid-solid reactions; X-ray diffraction
摘要:The magnesium (II)-exchanged zeolite A (MgA) was prepared by cation exchange process using sodium form zeolite A (NaA) and MgCl2 in aqueous solution. The prepared MgA was characterized by infrared spectroscopy and X-ray powder diffraction analysis. The results showed that the LTA structure remains after cation exchange. A static volumetric system was employed to evaluate the N-2 and O-2 adsorption properties of all the samples at 298 K. It was found that the N-2 adsorption capacity of MgA increased rapidly with pressure rise, and the adsorption isotherm of N-2 became nonlinear in low pressure region. The O-2 adsorption capacity of MgA increased slightly with pressure. The introducing Mg2+ into the sodium type zeolite A greatly enhanced the N-2 adsorption capacity. The highest N-2 adsorption capacity and N-2/O-2 selectivity appeared in the sample with 64.3% of Mg2+ replaced. (C) 2008 Elsevier B.V. All rights reserved.