Adsorptive interaction between typical VOCs and various topological zeolites:Mixture effect and mechanism  

作　　者：Bo Yu Hua Deng Yuqin Lu Tingting Pan Wenpo Shan Hong He 

机构地区：[1]Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China

出　　处：《Journal of Environmental Sciences》2024年第2期626-636,共11页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.52270111);the Youth Innovation Promotion Association,and Chinese Academy of Sciences (No.2019306);the Key Research Program of the Chinese Academy of Sciences (No.ZDRW-CN2021-3);the Central Funds Guiding the Local Science and Technology Development (2020L3023)。

摘　　要：Adsorption is one of the most feasible and effective methods to alleviate the volatile organic compounds(VOCs)pollution.However,the mixture effect and mechanism for competitive adsorption of VOCs on zeolites are barely addressed.In this study,toluene,acetone,and ethyl acetate as prevalent VOCs species were removed by four potential zeolites(13X,USY,Beta,ZSM-5)in both single-and multi-component systems.The structure-property relationship between adsorbate-adsorbent pairs was revealed by X-ray diffraction,scanning electron microscopy,energy dispersive spectrometer,X-ray fluorescence,N_(2) adsorption and density function theory calculation.The molecular polarity and volatility of VOCs species played key roles in adsorption and the dynamic uptakes were generally listed as follows:ethyl acetate>toluene>acetone.As for the above VOCs mixtures,13X zeolite selectively adsorbed oxygenated VOCs rather than toluene.In contrast,USY exhibited a preference to trap toluene.Ethyl acetate could be readily enriched by ZSM-5 and Beta selectively.The possible explanations and implications are discussed based on the subtle change in electron density.The results obtained are vital for understanding the mixture effect of VOCs adsorption and may guide the selection of proper adsorbent for real applications.

关 键 词：Adsorption Zeolites VOCS Mixture effect DFT 

分 类 号：TQ424[化学工程] X701[环境科学与工程—环境工程]