分布活化能模型计算噻吩在NaY上的脱附活化能

Calculation of Desorption Activation Energy of Thiophene on NaY With Distributed Activation Energy Model(DAEM)

采用程序升温脱附(TPD)技术测定了噻吩在NaY上以不同升温速率升温时的TPD谱图。采用活化能分布模型和一阶微分方法解析了噻吩在NaY上的非等温热重曲线。结果表明,NaY表面对噻吩是均匀的,脱附活化能大约为54 kJ/mol;较低的升温速率有助于提高对TPD曲线的分辨率。

Temperature programmed desorption（TPD）experiments were carried out to determinate the TPD spectra of thiophene desorbed from NaY at different temperature ramp.Non-isothermal curves were analyzed with distributed ac-tivation energy model and differential method.The experiment results indicates that the surface of NaY is homogeneous and the desorption activation energy is about 54 kJ/mol,the resolution in the identification of TPD can be increased by using a relatively low temperature ramp.