SOLID-STATE ION EXCHANGE IN ZEOLITES Part II. Alkaline Earth Chlorides/Mordenite

被引:43
作者
Karge, Hellmut G. [1 ]
Beyer, Hermann K. [2 ]
Borbely, Gabriella [2 ]
机构
[1] Max Planck Gesell, Fritz Haber Inst, D-1000 Berlin 33, Germany
[2] Hungarian Acad Sci, Cent Res Inst, H-1025 Budapest, Hungary
关键词
D O I
10.1016/0920-5861(88)80017-8
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Solid-state ion exchange of protons of acidic and non-acidic OH groups for alkaline earth cations in mordenite-type zeolites was investigated by means of TGA, temperature-programmed evolution of gases, IR and in-situ IR/GC measurements. The solid-state ion exchange occurs in two stages, i.e. via a low-temperature and a high-temperature process. Replacement of the protons of the acidic OH groups by alkaline earth cations considerably decreases the activity of hydrogene mordenite for catalysing hydrocarbon reactions such as conversion of ethylbenzene. The catalytic activity is greatly restored by treatment with water vapor subsequent to solid-state ion exchange.
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收藏
页码:41 / 52
页数:12
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