高等学校化学学报

高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (7): 1210.

• 研究论文 • 上一篇    下一篇

菱钾沸石(OFF)的离子交换及对SO2气体吸附性能研究

吕新春, 赵荣, 吴泰琉, 王力平, 孙尧俊   

  1. 复旦大学分析测试中心, 上海200433
  • 收稿日期:2004-10-15 出版日期:2005-07-10 发布日期:2005-07-10
  • 通讯作者: 孙尧俊(1945年出生),男,副教授,从事分子筛合成、性能和应用研究.E-mail:sunyj@fudan.edu.cn E-mail:sunyj@fudan.edu.cn

Ion-exchange of Offretites and Their Adsorption Performances to SO2

LV Xin-Chun, ZHAO Rong, WU Tai-Liu, WANG Li-Ping, SUN Yao-Jun   

  1. Center for Analysis and Measurement, Fudan University, Shanghai 200433, China
  • Received:2004-10-15 Online:2005-07-10 Published:2005-07-10

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摘要： 采用水热合成法制备了菱钾沸石(OFF),通过离子交换得到了H-OFF,Li-OFF,Na-OFF,K-OFF和Cs-OFF.用XRD,SEM,TG,DTA,固体1HNMR,FTIR和低温氮吸附等手段研究了离子交换性质,发现其晶体结构和晶貌在离子交换过程中基本不变,热力学性质随阳离子类型的改变而发生很大变化.样品的比表面积和孔体积随阳离子的增大而减小,B酸随阳离子半径的增大而减小,L酸反之.测定沸石样品对酸性气体SO2的吸附结果表明,Li-OFF在低分压下对SO2有很好的吸附性能.

关键词: 菱钾沸石, 离子交换, 多晶粉末X射线衍射, 热分析, 酸性质, SO2吸附

Abstract: Offretite(OFF) was synthesized through hydrothermal method, and H-OFF, Li-OFF, Na-OFF, K-OFF, Cs-OFF were obtained by ion-exchange. Subsequently, the samples were characterized by using XRD, SEM, nitrogen sorption, TG/DTA, FT-IR and solid-state 1H NMR. The structures and morphologies of the samples do not change during the ion-exchange. The thermodynamic properties, surface area, micropore volume and acidic properties change with variation of the cation types in the pores. The results of adsorption of the exchanged zeolites to SO2 show that Li-OFF exhibits a remarkable adsorption capability at lower pressure.

Key words: Offretite, Ion-exchange, XRD, Thermal analysis, Acidic properties, Adsorption of SO2

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