中文摘要：

利用液相离子交换法制备了CuY分子筛，并用X射线光电子能谱分析（XPS）对Cu元素进行了价态表征，用原位傅里叶转换红外（in-situ FTIR）和氨气程序升温脱附（NH3-TPD）技术对其进行了酸性表征。同时，以噻吩和环己烯为探针分子，CuY分子筛为吸附剂，研究了环己烯对噻吩在CuY分子筛B酸中心上吸附的影响机制。实验结果显示，CuY分子筛表层的Cu离子主要以Cu＋为主，其表面酸性主要由中强B酸和L酸组成。与稀土离子不同的是，铜离子的存在抑制了噻吩或环己烯在B酸中心上的聚合反应。因此，环己烯主要通过与噻吩的竞争吸附影响噻吩在CuY分子筛B酸性位上的吸附。

英文摘要：

A CuY zeolite prepared by liquid phase ion exchange was characterized by X-ray photoelectron spectroscopy, pyridine in situ Fourier transform infrared （in situ FTIR） spectroscopy, and ammonia temperature programmed desorption. The effect of cyclohexene on the adsorption of thiophene over the prepared CuY zeolite was explored by in situ FTIR. In particular, the role of the zeolite＇s Bronsted acidity was investigated in the adsorption process. The results show that the percentage of Cu＋ on the surface of the CuY zeolite can reach 77%. The surface acidity of the CuY zeolite mainly comprises medium and strong Bronsted acidity and Lewis acidity. According to the adsorption results, cyclohexene negatively influences thiophene adsorption on the Bronsted or Lewis acid sites in CuY by competitive adsorption. Although polymerization of thiophene and cyclohexene can occur easily on the HY or REY zeolites, the presence of Bronsted acids in the CuY zeolite was not sufficient to polymerize either thiophene or cyclohexene. This difference may be caused by an anti-synergistic effect between the Cu ions of the CuY zeolite and neighboring Bronsted acid sites, the result of which inhibits the polymerization of adsorbed thiophene and cyclohexene.