Abstract: CeY zeolites were prepared by liquid phase ion exchange (LPIE) and solid state ion exchange (SSIE). The adsorbents were characterized by means of XRD,N₂ physisorption,ICP and the total surface acidity of the adsorbents was monitored by NH₃TPD and in situ FTIR spectroscopy using pyridine as a probe. Properties of selective adsorptive desulfurization of HDS gasolines on the adsorbents have been investigated in this paper by using a fixedbed adsorber and a GCSCD technique. The adsorption capacity was found to follow the order of SCeY＞LCeY＞NaY＞HY. After LPIE and SSIE, and CeY zeolites had different surface acidity from NaY and HY, which greatly affected the adsorption desulfurization process. Additionally, Brnsted (B) acid sites was thought toresult in catalytic reaction of thiophene.

Key words: CeY zeolite,    ,  Adsorptive desulfurization,    ,  Hydrodesulfurized fuels,    , Surface acidity,    ,  Catalytic reaction

摘要： 用固相离子交换和液相离子交换法制备了C e Y分子筛, 利用 X射线衍射( XR D) 、 N2 物理吸附脱附、电感耦合等离子原子发射光谱仪( I C P) 等方法表征了吸附剂的物理性质, 借助 NH3 - T P D及吡啶 - 原位傅里叶变换红外( P y - F T I R) 技术考察了吸附剂表面的酸度分布及酸类型。采用固定床动态吸附实验和色谱 - 硫化学发光检测( G C -S C D) 偶联技术系统考查了改性 Y分子筛对加氢脱硫燃料油的吸附脱硫性能。结果表明, 4种 Y分子筛对加氢脱硫油脱硫能力大小顺序为S - C e Y>L - C e Y>N a Y>HY。表面酸性的差异显著地影响分子筛的吸附脱硫性能, 两种方法制备的C e Y分子筛表面酸性与 N a Y原粉差异较大, 分子筛表面B酸中心是噻吩发生催化反应的活性中心。

关键词: C e Y分子筛,   ,  , 吸附脱硫,    ,  , 加氢脱硫油,    ,  , 表面酸性,   ,  催化反应