Abstract:

Ag doped AgY zeolite adsorbents were prepared by introducing silver into the framework of NaY zeolite with microwave-assisted liquid ion exchange. Adsorbents were characterized with X-ray diffraction（XRD），N₂-adsorption specific surface area measurements（BET），X-ray photoelectron spectroscopy（XPS），and scanning electron microscope（SEM）. With thiophene/petroleum ether model oil as feedstock，the effects of adsorption temperature，adsorption time，and mass of AgY adsorbent on desulfurization were investigated. The results demonstrated that the best adsorption conditions were adsorption temperature 40 ℃，adsorption time 30 min and ratio of adsorbent mass and model fuel volume of 1∶40. Under such conditions，desulfurization ratio reached 98.46%. Static equilibrium adsorption capacity was 0.7970 mmol/g at 40 ℃.

摘要：

以NaY分子筛为载体，通过微波辅助液相离子交换法制备了Ag改性的AgY分子筛，并对其进行了X射线衍射（XRD）、N₂吸附比表面积（BET）、X射线光电子能谱（XPS）和扫描电镜（SEM）等表征分析。以噻吩/石油醚体系为模型化合物，考察了吸附温度、吸附时间以及吸附剂用量等条件对吸附剂性能的影响，结果表明吸附温度40 ℃、吸附时间30 min、吸附剂质量/原料油体积（g/mL）为1∶40时脱硫效果最好，脱硫率为98.46%。40 ℃时，AgY吸附剂的静态平衡吸附量为0.7970 mmol/g。