The curves of FT-IR, adsorption isotherms and TPD were carried out by FT-IR and IGA(intelligent gravimetric analyzer). The spectrum of FT-IR shows that there is only physical adsoption exsits for thiophene on NaY because of no new peaks appeared in the FT-IR curves, but both physical and chemical adsoption exsit on NiY due to the peaks of 1 391 cm^-1 and 1 440 cm^-1 in the curves which attributable to π complexation and S-M interaction. The adsorption isotherms confirm that the adsorption quantity of thiophene on NaY decreases with temperaure increasing which consistent with the physical adsorption; but the other is different, the adsotion quantity of thiophene at 302 K and 335 K is equivalent and decreases at 373 K which indicated that the different interaction model between adsorbent and adsorbate on NiY. The spectrum of TPD shows that there are two kinds of active site existting on NiY surface for thiophene, which responsible for the different chemical interation. 

 

Thiophene,   ,  Adsoption,   ,  Temperature-programmed desorption(TPD)