Abstract: Adsorption behavior of thiophene in NaY and CeY zeolites prepared by liquid phase ion exchange and solid state ion exchange methods by using the frequency response method, combined with the TG/DTG curves and PyFTIR technique to analyze the the adsorption and diffusion mechanism of thiophene on these zeolites. The results indicate that LCeY zeolites contain the strong B acid and weak L acid sites, while the SCeY zeolites contain the weak L acid and a small amount of weak B acid sites. Only one weak adsorption process of thiophene can be observed for the SCeY and NaY zeolites. Two different adsorption processes can be formed in LCeY zeolites, and the different interactions can be attributed to the different acid sites.

Key words:

• Frequency response,    ,  Zeolites,    ,  Adsorption   ,  Diffusion, Acid sites

摘要： 利用频率响应技术考察了噻吩在 N a Y分子筛和两种分别采用液相和固相离子交换法制得的C e Y分子筛上的吸附、 扩散行为, 并与TG / DTG曲线和吡啶红外等技术相结合来分析噻吩在分子筛上的吸附扩散机理。结果表明, L - C e Y分子筛含有强B酸和弱L酸, S - C e Y分子筛含有弱L酸和少量弱B酸。噻吩在S - C e Y及 N a Y分子筛上只存在一种吸附过程, 吸附作用相对较弱。而噻吩在L- C e Y分子筛上存在两种不同的吸附过程, 吸附作用相对较强, 其吸附作用模式是与L - C e Y分子筛上不同酸性位作用的结果。

关键词: 频率响应,    ,  分子筛,   ,  吸附,    , 扩散,   ,  酸性位