苯在等级孔Y型分子筛上吸附与扩散行为研究

doi::10.3969/j.issn.1006-396X.2017.06.004

石油化工高等学校学报 ›› 2017, Vol. 30 ›› Issue (6): 17-21.DOI: :10.3969/j.issn.1006-396X.2017.06.004

苯在等级孔Y型分子筛上吸附与扩散行为研究

刘慧¹,孟秀红¹,李戎²,段林海¹

1.辽宁石油化工大学化学化工与环境学部，辽宁抚顺 113001；2.新疆轻工职业技术学院，新疆维吾尔自治区乌鲁木齐 830021

收稿日期:2017-03-29 修回日期:2017-09-06 出版日期:2017-12-20 发布日期:2018-02-27
通讯作者: :段林海(1973-),男,博士,教授,从事石油化工、催化化学领域的研究;E-mail:lhduan@126.com。
作者简介::刘慧(1991-),女,硕士研究生,从事烃类的吸附扩散性能研究;E-mail:310352948@qq.com。
基金资助:
:国家自然科学基金项目资助(21476101)。

Adsorption and Diffusion of Benzene on Hierarchically Structured Y Zeolite

Liu Hui¹, Meng Xiuhong¹, Li Rong², Duan Linhai¹

1.College of Chemistry, Chemical Engineering and Environment Engineering, Liaoning Shihua University, Fushun Liaoning 113001, China; 2.Xinjiang Institute of Light Industry Technology, Urumqi Xinjiang 830021, China

Received:2017-03-29 Revised:2017-09-06 Published:2017-12-20 Online:2018-02-27

摘要/Abstract

摘要： 以不同等级孔Y型分子筛为研究对象,运用XRD、N2 吸附、NH3-TPD和Py-FTIR对其织构性质和酸性质进行表征。采用智能重量分析仪(IGA)等技术考察了苯在等级孔Y 型分子筛上吸附扩散性能。结果表明, 等级孔Y型分子筛在改性过程中晶型结构未发生明显变化,但改变了其孔道结构、酸类型、酸量及酸强度。苯分子在等级孔Y型分子筛上的传质性能主要与分子筛的孔道结构有关,等级孔Y 型分子筛的孔容越大,扩散速率越快, 更利于苯分子的扩散。而苯分子的饱和吸附量大小主要取决于等级孔Y型分子筛的酸中心类型及其强度。

关键词: 等级孔Y型分子筛, 酸性活性位, 苯分子, 吸附与扩散

Abstract: Y zeolites with different pore structural and acid properties were studied by XRD, N₂ physical adsorption, NH₃-TPD and PyFTIR. The adsorption and diffusion properties of benzene in hierarchical pore Y zeolites were investigated by using intelligent gravimetric analyzer (IGA). It was found that there was no obvious change in the crystal structure of the Y zeolites in the process of modification, while the pore structure, acid type, acidity and acid strength were changed. The mass transfer performance of benzene molecules in the pore level Y zeolite molecular sieve was mainly decided by pore structure. The larger of pore volume Y molecular sieve was, the faster diffusion rate was. It was more conducive to the diffusion of benzene molecule. The amount of saturated adsorption of benzene molecule was depended on the type and intensity of acid type of Y zeolite.

Key words: Hierarchical pore Y zeolite, Acid active site, Benzene molecule, Adsorption and diffusion

刘慧,孟秀红,李戎,段林海. 苯在等级孔Y型分子筛上吸附与扩散行为研究[J]. 石油化工高等学校学报, 2017, 30(6): 17-21.

Liu Hui, Meng Xiuhong, Li Rong, Duan Linhai. Adsorption and Diffusion of Benzene on Hierarchically Structured Y Zeolite[J]. Journal of Petrochemical Universities, 2017, 30(6): 17-21.

苯在等级孔Y型分子筛上吸附与扩散行为研究

Adsorption and Diffusion of Benzene on Hierarchically Structured Y Zeolite

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics