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改性13X分子筛的制备及其脱氯性能

作者:时间:2025-12-28点击数:



全文下载: 202506005.pdf


文章编号: 1672-6987(2025)06-0038-07 DOI: 10.16351/j.1672-6987.2025.06.005

谷洁, 周雪艳, 黄丙田, 程兴远, 王芳, 王广建*(青岛科技大学 化工学院, 山东 青岛 266042)

摘要: 采用双金属改性13X分子筛制备新型吸附脱氯剂,通过静态吸附实验考察其吸附脱氯性能,利用XRD、SEM、N2-脱附、NH3-TPD等表征手段考察了金属的引入对吸附剂结构和性能的影响,并通过动力学模型对Zn-Cu/13X吸附剂上1,2-二氯乙烷的吸附机理进行了系统研究。结果表明:在吸附温度30 ℃,吸附时间6 h,Zn-Cu双金属溶液浓度为0.05 mol · L-1Zn/Cu摩尔比为1∶0.5时,Zn-Cu/13X分子筛吸附剂的脱氯效果最佳,达到了94.06%。表征结果表明,Zn-Cu/13X表面形貌未发生明显变化,中强酸与总酸的含量有一定程度的提升。结合静态吸附脱氯实验可知,中强酸以及总酸量的增加对吸附脱氯有利。根据动力学模型拟合可知,Zn-Cu/13X分子筛吸附1,2-二氯乙烷的吸附过程符合拟二级吸附动力学模型,且该吸附过程是物理吸附与化学吸附共同参与。


关键词: 吸附脱氯; 双金属改性; 13X分子筛; 1,2-二氯乙烷; 吸附动力学


中图分类号: TE 626.9        文献标志码: A


引用格式: 谷洁, 周雪艳, 黄丙田, . 改性13X分子筛的制备及其脱氯性能[J]. 青岛科技大学学报(自然科学版), 2025, 46(6): 38-44.


GU Jie, ZHOU Xueyan, HUANG Bingtian, et al. Preparation of modified 13X zeolite and study on its dechlorination performance[J]. Journal of Qingdao University of Science and Technology(Natural Science Edition), 2025, 46(6): -.

Preparation of Modified 13X Zeolite and Study on Its Dechlorination Performance

GU Jie, ZHOU Xueyan, HUANG Bingtian, CHENG Xingyuan, WANG Fang, WANG Guangjian

College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

Abstract: Static adsorption studies were used to test the adsorption and dechlorination capabilities of a novel adsorbent dechlorinator that was created utilizing bimetallic modified 13X zeolites. By using XRD, SEM, N2 adsorption-desorption, NH3-TPD, and other characterization tools, the impact of metal introduction on the structure and performance of the adsorbent was explored, and the 1,2-dichloroethane adsorption mechanism on Zn-Cu/13X adsorbent was investigated by kinetic modeling. A thorough investigation was conducted. The outcomes demonstrated that the Zn-Cu/13X zeolite adsorbent's best dechlorination effect was reached at an adsorption temperature of 30 °C, an adsorption period of 6 h, a concentration of Zn-Cu bimetallic solution of 0.05 mol · L-1 and a Zn/Cu molar ratio of 1∶0.5, reaching 94.06%. According to the characterization results, the amount of medium-strength acid and total acid increased slightly, while the surface morphology of Zn-Cu/13X did not change noticeably. It can be shown from the static adsorption dechlorination studies that an increase in total and medium-strength acid is advantageous for adsorption dechlorination. According to the proposed secondary adsorption kinetic model, 1,2-dichloroethane adsorption on Zn-Cu/13X zeolite occurs, and the adsorption process is a combination of physical and chemical adsorption.


Key words: static adsorption dichlorination; bimetallic modification; 13X zeolite; 1,2-dichloroethane; adsorption kinetics

收稿日期: 2024-12-22

基金项目: 山东省自然科学基金项目(ZR2021MB134).

作者简介: 谷洁(1995—),女,硕士研究生.    * 通信联系人.


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