频率响应法研究噻吩在分子筛上的吸附行为

Study on thiophene adsorption on zeolite catalysts by frequency response technique

运用频率响应方法（Frequency Response）研究了噻吩在NaY分子筛和CeY分子筛上的吸附行为，在（335～473）K和（13．3～133．3）Pa绘制频率响应谱图，并根据频率响应谱图计算每个吸附过程的动力学参数。研究结果表明，噻吩在NaY和CeY分子筛上的吸附均以吸附为速率控制步骤，噻吩在NaY分子筛上的吸附是由于竹电子作用和孔填充机理；噻吩在CeY分子筛上的吸附过程是由于π络合和形成S—M键的机理。

Frequency response （FR） technique was used in the study on adsorption behaviors of thiophene on NaY and CeY. FR spectra of thiophene on NaY and CeY were recorded at （13.3 -133.3） Pa and （335 -473） K. Kinetic parameters for each adsorption process were derived from the FR spectra. The results indicated that adsorption was the controlling step. Adsorption of theiophene on NaY was in accordance with ,tr-electmnic interaction of thiophene and pore-filling mechanism, while on CeY, adsorption of thiophene was in accordance with mechanism of π-complexation and direct formation of S--M bond.