[1]任秀秀,夏凌云,梁梦迪,等.UiO-66及其官能化改性材料对C6烷烃吸附性能研究[J].常州大学学报(自然科学版),2021,33(05):50-58.[doi:10.3969/j.issn.2095-0411.2021.05.007]
　REN Xiuxiu,XIA Lingyun,LIANG Mengdi,et al.Adsorption Properties of C6 Alkane on UiO-66 and Its Functionalized Material[J].Journal of Changzhou University(Natural Science Edition),2021,33(05):50-58.[doi:10.3969/j.issn.2095-0411.2021.05.007]
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UiO-66及其官能化改性材料对C6烷烃吸附性能研究()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第33卷
期数:
2021年05期
页码:
50-58
栏目:
化学化工
出版日期:
2021-09-28

文章信息/Info

Title:
Adsorption Properties of C6 Alkane on UiO-66 and Its Functionalized Material
文章编号:
2095-0411(2021)05-0050-09
作者:
任秀秀;  夏凌云;  梁梦迪;  徐 荣;  钟 璟
(常州大学 石油化工学院, 江苏 常州213164)
Author(s):
REN Xiuxiu;  XIA Lingyun;  LIANG Mengdi;  XU Rong;  ZHONG Jing
(School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China)
关键词:
金属有机骨架材料;  改性UiO-66材料;  己烷异构体;  吸附;  动力学
Keywords:
MOF;  functionalized UiO-66;  hexane isomer;  adsorption;  dynamics
分类号:
TE 68
DOI:
10.3969/j.issn.2095-0411.2021.05.007
文献标志码:
A
摘要:
利用溶剂热法制备了UiO-66及其官能化改性的UiO-66-NH2, UiO-66-(CF3)2材料, 均为微孔。40 ℃下测定正己烷(nC6)、 3-甲基戊烷(3MP)、 2,2-二甲基丁烷(22DMB)3种C6异构体分别在3种材料上的静态吸附速率曲线及等温线, 并通过方程拟合研究其吸附行为。结果表明, 改性的UiO-66-NH2和UiO-66-(CF3)2对nC6或3MP的吸附速率及平衡饱和吸附量均大于UiO-66; 通过动力学拟合, UiO-66对nC6吸附符合一级动力学模型, 反相吸附22DMB; 而UiO-66-NH2和UiO-66-(CF3)2对3MP的吸附符合二级动力学模型, 但均对动力学直径较小的nC6吸附量较大, 更适合于从烷烃异构体中分离出具有高辛烷值的支链烷烃。通过等温线拟合, 发现UiO-66和UiO-66-NH2均符合Freundlich吸附等温方程, 但UiO-66-NH2与烷烃异构体的作用力更强; UiO-66-(CF3)2对3MP的吸附行为更符合Langmuir方程, 为单分子层吸附。
Abstract:
UiO-66 and functionalized UiO-66-NH2 and UiO-66-(CF3)2 materials were prepared by a solvothermal method. Nitrogen absorption/desorption isotherm indicated that the three materials are all microporous. The static adsorption rate curves and isotherms of n-hexane(nC6), 3-methylpentane(3MP)and 2,2-dimethylbutane(22DMB)of the three C6 isomers were measured at 40 ℃, and their adsorption behaviors were studied by model fitting. The results showed that the adsorption rate and equilibrium saturation adsorption capacity of UiO-66-NH2 and UiO-66-(CF3)2 were higher than UiO-66 for nC6 or 3MP. By kinetic fitting, nC6 adsorption on UiO-66 was fitted to the First-order kinetic model with reverse adsorptions on 22DMB. The alkane of 3MP on the modified UiO-66-NH2 and UiO-66-(CF3)2 were fitted to second-order kinetic model, but, both of them showed large adsorption capacity for nC6 with a relative smaller kinetic diameter, which are more suitable for the separation of branched alkanes with high octane values from alkane isomers. Through isotherm fitting, it is found that UiO-66 and UiO-66-NH2 were fitted well with Freundlich adsorption isotherm equation, but UiO-66-NH2 has a stronger interaction force with alkane isomers. The adsorption behavior of UiO-66-(CF3)2 on 3MP was more in line with the Langmuir equation, which was monolayer adsorption.

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备注/Memo

备注/Memo:
收稿日期:2020-12-02。基金项目:江苏省精细化工重点实验室资助项目(KF1904); 常州大学科研启动基金资助项目(ZMF19020297)。作者简介:任秀秀(1987—), 女, 山西临汾人, 博士, 讲师。E-mail: renxiuxiu@cczu.edu.cn
更新日期/Last Update: 1900-01-01