Katoh M, Yamazaki T, Ozawa S
Faculty of Engineering, Tohoku University, Aoba-ku, Sendai-shi, 980-77, Japan
J Colloid Interface Sci. 1998 Jul 15;203(2):447-55. doi: 10.1006/jcis.1998.5512.
Adsorption of binary gases (CH4/CO, CO/NO, and CO/CO2) on alkali metal (Li, Na, K, Rb, and Cs) ion-exchanged ZSM-5 zeolites were studied using IR spectroscopy. IR absorption bands of preadsorbed CH4, particularly that of nu1 (induced band), decreased with the increase in the partial pressure of CO, indicating the preferential adsorption of CO on the cation site of zeolite. In addition, IR band profiles of adsorbed CO changed in a different manner when CH4, NO, or CO2 was added to the system, suggesting that the selectivity of adsorption was governed not only by the polarity of adsorbates but also by the nature of sites present in the ZSM-5 pore bearing different electric field strengths. Copyright 1998 Academic Press.
采用红外光谱法研究了二元气体（CH4/CO、CO/NO和CO/CO2）在碱金属（Li、Na、K、Rb和Cs）离子交换ZSM-5沸石上的吸附情况。预吸附CH4的红外吸收带，特别是ν1（诱导带）的吸收带，随着CO分压的增加而降低，这表明CO优先吸附在沸石的阳离子位点上。此外，当向系统中添加CH4、NO或CO2时，吸附CO的红外波段轮廓以不同方式变化，这表明吸附选择性不仅受吸附质极性的影响，还受ZSM-5孔中具有不同电场强度的位点性质的影响。版权所有1998年学术出版社。
