物理化学学报 >> 1998, Vol. 14 >> Issue (12): 1094-1097.doi: 10.3866/PKU.WHXB19981207

研究论文 上一篇    下一篇

脱铝沸石羟基窝的表征

刘兴云, 刘辉, 李宣文, 徐筱杰   

  1. 北京大学化学与分子工程学院,北京 100871
  • 收稿日期:1998-02-25 修回日期:1998-06-17 发布日期:1998-12-15
  • 通讯作者: 刘兴云

Quantitative Characterization of "Hydroxyl Nests"Concentration for the Dealuminated Y Zeolite

Liu Xing-Yun, Liu Hui, Li Xuan-Wen, Xu Xiao-Jie   

  1. College of Chemistry and Molecular Engineering,Peking University,Beijing 100871
  • Received:1998-02-25 Revised:1998-06-17 Published:1998-12-15
  • Contact: Liu Xing-Yun

摘要:

NH4Y和NaY沸石用草酸溶液脱铝制备的样品,用红外光谱测定了表征“羟基窝”的3710cm-1处的背底吸光度(A3710).并考察了其热稳定性;用DTA和TGA建立了定量测定“羟基窝”的方法,并测定了各样品的“羟基窝”浓度,样品的“羟基窝”浓度与其实际脱铝数相对应.

关键词: 脱铝沸石;“羟基窝”, 定量表征

Abstract:

The method of quantitative determinaltion of "hydroxyl nests" by DTA and TGA was established. The concentration of "hydroxyl nests" for NH4Y and NaY zeolites dealuminated with an aqueous oxalic acid solution was determined by snch method. The results indicated that the "hydroxyl nests" concentration of the dealuninated zeolite sample is compatible with its number of actual dealumination per gram. This shows that after a framework aluminum of zeolite was removed by acid, a "hydroxyl nests" formed conclusively.

Key words: Dealuminated Y zeolite, "Hydroxyl nests", Quantitative determination