分子筛吸附性质的气相色谱研究  

Study on Adsorption Characteristics of Zeolite by Gas Chromatography

作　　者：庞先勇[1] 谢鲜梅[1] 李阳[1] 李瑞丰[1] 

机构地区：[1]太原理工大学化学工程与技术学院煤科学与技术教育部重点实验室,太原030024

出　　处：《分析科学学报》2004年第6期565-568,共4页Journal of Analytical Science

基　　金：国家重点基础发展规划资助项目(GG20000048009)

摘　　要：应用气相色谱分析法,研究了空气、氮气、氧气、甲烷在两种新合成的4A、5A分子筛上的吸附和分离性质,根据相关的吸附动力学模型导出了色谱峰与吸附热和吸附活化能关系的公式,并应用他们对检测数据进行了处理,得出了这两种分子筛对上述气体的吸附特征、选择性及吸附热和吸附活化能,以及气体保留时间、吸收峰面积与温度的关系。并且从分子筛的结构特征分析了吸附热和吸附活化能变化的原因。By means of chromatographic analysis, the adsorption characteristics towards some gases, such as, air, nitrogen,oxygen, and methane on new synthesized 4A,5A zeolites were investigated. Based on the adsorption kinetics theory of Eлoвич formula of relationship between chromatography peak and temperature was derived. The absorption heat and absorption activity energy for these gases on 4A,5A zeolites were obtained, and it was in range of -21.11～7.08 kJ/mol and 4.99～149.65 kJ/mol, respectively. The effect of zeolites structure and aparture was discussed briefly.

关 键 词：分子筛 气相色谱 吸附热 吸附活化能 

分 类 号：O657.71[理学—分析化学] TQ028.15[理学—化学]