Removal of Toluene by Adsorption/Desorption Using Ultra-stable Y Zeolite

论文摘要

The adsorption performance of toluene on ultra-stable Y zeolite（USY） was studied via dynamic adsorption. The effects of bed temperature, initial concentration, and feed flow rate on adsorption were investigated. The Yoon–Nelson model was used to fit the toluene breakthrough curves. The length of mass transfer zone was calculated based on breakthrough curves. The Langmuir–Freundlich model fit the adsorption isotherms of toluene on USY, which indicated that the surface of USY was heterogeneous. The adsorption isosteric heat calculated from adsorption isotherms ranged from 54.3 to 69.8 kJ/mol, indicating physical adsorption. The combined technique of temperature swing adsorption with vacuum swing adsorption（TVSA） exhibited excellent desorption performance, which was attributed to the low desorption activation energy. Under optimized TVSA conditions, the desorption rate of toluene reached 90.6% within 10 min. The long-term cyclic utilization results indicated that the adsorption capacity of USY was stable.

论文目录

文章来源

类型: 期刊论文

作者: Lei Xu,Yonghong Li,Jiang Zhu,Zhiyuan Liu

来源: Transactions of Tianjin University 2019年04期

年度: 2019

分类: 工程科技Ⅱ辑,工程科技Ⅰ辑

专业: 环境科学与资源利用

单位: Key Lab for Green Chemical Technology of Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,National Engineering Research Center for Distillation Technology,Collaborative Innovation Center of Chemical Science and Engineering

分类号: X701

页码: 312-321

总页数: 10

文件大小: 1778K

下载量: 14

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