Abstract: MgO/13X，Fe2O3/13X and MgO⁃Fe2O3/13X were prepared by impregnation method using 13X molecular sieve as carrier and MgO and Fe2O3 as active components. The structure of the prepared adsorbent was analyzed by XRD，N2 adsorption⁃desorption，TG⁃DTA and other characterization techniques, and the dechlorination effect of the adsorbent on naphtha was investigated. The results show that the metal oxides such as MgO and Fe2O3 are uniformly supported on 13X，the specific surface area and pore size of the modified adsorbent are slightly increased，and the pore volume is decreased. By comparison，the dechlorination effect of MgO⁃Fe2O3/13X adsorbent is best. The optimum conditions were as follows：adsorption time 2 h，adsorption temperature 60 ℃, and ratio of solvent to oil 1∶40，the dechlorination rate was the highest，reaching 89%. The fitting results show that the adsorption process conforms to the quasi⁃secondary kinetic model，mainly the physical adsorption proces.

Key words: Metal modification, Adsorption, 13X molecular sieve, Dechlorination

摘要： 以13X分子筛为载体，MgO和Fe2O3为活性组分,采用浸渍法制备了MgO/13X、Fe2O3/13X、MgO⁃Fe2O3/13X等三种吸附剂。利用XRD、N2吸附⁃脱附、TG⁃DTA等表征技术对制备的吸附剂结构进行了分析，并考察了吸附剂对石脑油的脱氯效果。结果表明，MgO和Fe2O3等金属氧化物均匀负载于13X分子筛上，且改性后的吸附剂比表面积和孔径略有增加，孔容有所减小。通过对比得出MgO⁃Fe2O3/13X吸附剂的脱氯效果最佳，最佳条件为吸附时间2 h、吸附温度60 ℃、剂油体积比1∶40的情况下，脱氯率最高，达到89%。通过拟合结果可知,吸附过程符合准二级吸附动力学模型，主要为物理吸附过程。

关键词: 金属改性, 　吸附, 　13X分子筛, 　脱氯