IR STUDY OF ADSORPTION OF OLEFINS ON DEUTERATED ZSM-5
IR STUDY OF ADSORPTION OF OLEFINS ON DEUTERATED ZSM-5
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氘代ZSM-5吸附烯烃的红外研究
DOI：
10.1021/jp9800416
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发表时间：
1998
影响因子：
3.3
通讯作者：
K. Domen
中科院分区：
文献类型：
--
作者：
J. Kondo;Fumitaka Wakabayashi;K. Domen
采用红外光谱法研究了直链烯烃（C2−C4）在无刘易斯酸中心的D-ZSM-5分子筛上的吸附动力学。在170 K以下，除乙烯以外的烯烃通过与烷基的弱氢键作用吸附在分子筛的酸中心（BAS）上，温度升高，这些烯烃释放并迁移到分子筛笼壁上，没有任何特定的吸附中心。进一步加热导致CC转化为BAS的强氢键（π-络合物），表明π-络合物的形成是活化过程。
Adsorption dynamics of linear olefins (C2−C4) on D-ZSM-5 with no Lewis acid sites was examined below 180 K by IR spectroscopy. Below 170 K, olefins except ethene adsorbed on Brønsted acid sites (BAS) by very weak hydrogen-bonding with their alkyl groups, which were then released and migrated on the wall of the zeolite cage without any specific adsorption sites by increasing the temperature. Further heating caused the conversion to strong hydrogen bonding of CC to BAS (π-complex), indicating that the formation of π-complexes is an activated process.