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红外光谱测定Co在AgY上的吸附热
MEASUREMENT OF BOND ENERGY FOR CARBON MONOXIDE ADSORBED ON Ag_n~+ ION BY IN-SITU IR METHOD
【摘要】 用红外透射光谱法,在295~368K范围内,作CO在AgY分子筛上的等温吸附线,建立CO在Ag_n~+原子簇上的等量吸附热,其值为35.6kJ/mol,对应吸附熵值为0.163kJ/mol·K,从而获得了Co与Ag_n~+的吸附键能量为42.20kJ/mol。
【Abstract】 The isothermo adsorption curves for carbon monoxide adsorption on Agn+ ions. of AgY zeolite were carried out on the in-situ IR spectrum system at 2178cm-1, 295~368K temperature range. The isosteric heat of adsorption was calculated on the basis of In P versus 1/T curve at each amount adsorbed. The results show that the isosteric heat and entropy of adsorption only depended to a minor degree upon amount adsorbed over the experiment all range (200~2133Pa). Because of this behavious the values of isosteric heat and entropy of adsorption are near 35.60 kJ/mol and 0.163 kJ/mol-K respectively, subsequently, the bond energy of adsorption, Agn+—Co, is 42.20kJ/mol.
【Key words】 Infrared spectroscopy; Carbon monoxide; AgY zeolite; Adsorption heat;
- 【文献出处】 光谱学与光谱分析 ,Spectroscopy and Spectral Analysis , 编辑部邮箱 ,1992年02期
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