中国环境科学
 
 
中国环境科学  2019, Vol. 39 Issue (5): 1830-1837    DOI:
大气污染与控制 最新目录| 下期目录| 过刊浏览| 高级检索 |
吸附树脂吸附多组分VOCs的动力学特性及预测
杨新玉, 史秋怡, 龙超
南京大学环境学院, 污染控制与资源化研究国家重点实验室, 江苏 南京 210023
Adsorption kinetics and prediction of multicomponent VOCs on polymeric resins
YANG Xin-yu, SHI Qiu-yi, LONG Chao
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China

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摘要 

采用微分吸附床(DAB)法研究甲苯、环己烷、正戊烷的单组分、双组分和三组分在2种不同孔结构吸附树脂上的吸附动力学行为,探讨了吸附树脂的孔结构对吸附动力学的影响,建立多组分吸附动力学预测模型.结果表明,单组分甲苯、环己烷和正戊烷在2种吸附树脂上吸附扩散阻力同时存在于微孔孔口和孔内,符合孔口-孔内双阻力模型(Dual模型);采用孔口-孔内双阻力模型结合扩展Langmuir多组分吸附平衡方程,可根据单组分吸附动力学数据较好地预测双组分和三组分VOCs在2种吸附树脂上的吸附动力学曲线,预测值与实验值间的平均相对误差小于17%;相比于大孔吸附树脂,各组分在超高交联吸附树脂上吸附过程存在明显的竞争取代,取代顺序为甲苯 > 环己烷 > 正戊烷.

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杨新玉
史秋怡
龙超
关键词 挥发性有机物吸附树脂吸附动力学双阻力模型    
Abstract

The effect of the pore structure of polymeric resins on their adsorption kinetics was explored and Dual Resistance Model for predicting absorption kinetics of multiple components was established. The adsorption kinetics of individual toluene, cyclohexane and n-pentane as well as their dual or triple combinations on two polymeric resins were studied by the differential adsorption bed (DAB) method. Dual Resistance Model, which is a combination of barrier resistance at the micropore mouth and pore interior resistance, was effective for the fitting of adsorption kinetic data of single component, indicating that the adsorption diffusion resistance existed at the micropore mouth and the mircopore interior simultaneously. The adsorption kinetic curves of binary and ternary component VOCs on two resins can be predicted effectively by using the Dual Resistance Model as well as the extended Langmuir multi-component adsorption equilibrium equation. The average error between model prediction and experimental data were less than 17%. The competitive adsorption between the different components on the microporous resin was more significant than that on the macroporous resin and adsorption affinity of three VOCs on two resins had the following order:toluene > cyclohexane > pentane.

Key wordsvolatile organic compounds    adsorption resin    adsorption kinetics    dual resistance model   
收稿日期: 2018-10-10     
PACS: X701  
基金资助:

国家自然科学基金资助项目(51578281)

通讯作者: 龙超,教授,clong@nju.edu.cn     E-mail: clong@nju.edu.cn
作者简介: 杨新玉(1989-),男,河南驻马店人,南京大学硕士研究生,主要从事有机废气污染控制技术及原理研究.
引用本文:   
杨新玉, 史秋怡, 龙超. 吸附树脂吸附多组分VOCs的动力学特性及预测[J]. 中国环境科学, 2019, 39(5): 1830-1837. YANG Xin-yu, SHI Qiu-yi, LONG Chao. Adsorption kinetics and prediction of multicomponent VOCs on polymeric resins. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(5): 1830-1837.
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