张金柯^1,2, 缪光武², 金佳敏², 陈银飞¹(), 卢晗锋¹, 宁文生¹, 白占旗², 刘武灿²

1.浙江工业大学 化学工程学院,杭州 310014
2.浙江省化工研究院 含氟温室气体替代及控制处理国家重点实验室,杭州 310023

收稿日期:2020-03-13出版日期:2021-09-28发布日期:2021-10-08
通讯作者:陈银飞E-mail:yfchen@zjut.edu.cn
作者简介:张金柯(1983-),男,浙江省诸暨市人,高级工程师,主要从事氟化工分离纯化、含氟电子气体、高纯氟烃制备、化工过程模拟、吸附及精馏技术的开发及应用等研究

Analysis of Factors and Significances of Adsorption Kinetics R115/NaX System

ZHANG Jinke^1,2, MIAO Guangwu², JIN Jiamin², CHEN Yinfei¹(), LU Hanfeng¹, NING Wensheng¹, BAI Zhanqi², LIU Wucan²

1. College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
2. State Key Laboratory of Fluorinated Greenhouse Gases Replacement and Control Treatment, Zhejiang Research Institute of Chemical Industry, Hangzhou 310023, China

Received:2020-03-13Online:2021-09-28Published:2021-10-08
Contact:CHEN Yinfei E-mail:yfchen@zjut.edu.cn

摘要/Abstract

摘要： 为了认识五氟一氯乙烷(R115)在NaX上的吸附动力学机理,以指导R115吸附脱除和催化转化等工业应用,分别利用准一级、准二级和内扩散模型研究R115浓度(指体积分数)和吸附剂粒径对R115吸附的影响.对比Thomas和Yan模型对穿透曲线的适用性,采用二水平三因子实验方法分析R115浓度、吸附剂质量和体积流速对吸附性能影响的显著性和相关性.研究结果显示,吸附过程主要受膜扩散控制;Yan和准一级吸附动力学模型对实验数据拟合度较高;吸附剂质量是最关键因素,显著影响穿透时间、饱和时间、吸附剂处理量和床层利用率;吸附剂质量和体积流速的交互作用对吸附剂处理量影响显著.
关键词: 五氟一氯乙烷, 吸附, 动力学, 穿透曲线, 实验设计
Abstract: To understand the adsorption kinetic mechanism of chloropentafluoroethane (R115) on NaX and then to guide the industrial applications of R115 adsorption removal and catalytic conversion, the effect of R115 concentration (referring to volume fraction) and adsorbent particle size on adsorption performance are studied by using pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. The applicability of the Thomas model and Yan model for breakthrough curve analysis are compared. A two-level three-factor experimental method is implemented to evaluate the significance and possible correlations of R115 concentration, adsorbent mass, and flow rate on adsorption performance. The results indicate that the adsorption process is mainly controlled by R115 external film diffusion. The Yan model and the pseudo-first-order adsorption kinetic model fit the experimental data better. The adsorbent mass is the most important factor significantly affecting the breakthrough time, saturation time, volume of effluent treated per gram of adsorbate, and fractional bed utilization. The interaction of adsorbent mass and flow rate has a significant effect on the volume of effluent treated per gram of adsorbate.
Key words: chloropentafluoroethane, adsorption, kinetics, breakthrough curves, experimental design


PDF全文下载地址:

点我下载PDF