【摘要】 在合成不同硅铝比Naβ沸石的基础上,采用固相离子交换方法制备了Cu(I)、Ag(I)离子改性的β沸石系列吸附剂。样品的结晶度和BET比表面积有所降低,XRD表征结果表明,所制备的样品保持了结构的完整性,随着硅铝比的增加,Naβ样品的BET比表面积增加。Cu(I)、Ag(I)离子的引入使样品的红外骨架振动峰向低波数移动,与相同硅铝比的Naβ沸石相比,吸附剂的BET比表面积有所降低。对模型油的静态吸附结果表明,硅铝摩尔比为25时Cu(I)β吸附性能最好,模型油中硫的质量分数降到10×10-6以下,脱除率达到95%,Ag(I)β次之,脱除率达到87%。常温常压下固定床动态吸附穿透实验得到Cu(I)β、Ag(I)β的穿透硫容分别为0.144 mmol/g和0.132 mmol/g。更多还原

【Abstract】 Through solid-state ionic exchange technique,a series of Cu（I）,Ag（I） cation modified zeolite β sorbents were prepared on the base of preparation of Naβ zeolite with different Si/Al ratio.The samples were characterized by XRD,FTIR and N₂ adsorption-desorption technique.Although the crystallicity and BET surface area of the sorbents are affected by exchanged metal cation in the framework,the XRD results show that as-made samples were kept framework structure integrity.The BET surface areas of as-made Naβ samples decrease as the Si/Al ratio increase,and BET surface areas of Cu（I） β,Ag（I） β sorbents decrease comparing with the same Si/Al ratio Na β zeolite.FT-IR spectra of the samples show that the peak of framework vibration moves to low wave number as Cu（I）,Ag（I） were inserted.Then the thiophene adsorption properties of Cu（I） β,Ag（I） β,Na β were evaluated at ambient conditions.Static state experimental results show that Cu（I） β exhibits stronger adsorption for thiophene.As the Si/Al mol ratio of zeolite β is 25 about 95% thiophene was adsorbed by Cu（I） β and 87% by Ag（I） β.Through dynamic adsorption experiments,the breakthrough capacities of the Cu（I）-β and Ag（I）-β sorbents are 0.144mmol/g and 0.132mmol/g,respectively.更多还原