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Adsorption and desorption characteristics of hydrophobic hierarchical zeolites for the removal of volatile organic compounds
Li, Xianfeng1,3; Wang, Jian1; Guo, Yangyang1; Zhu, Tingyu1,2; Xu, Wenqing1,2
2021-05-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume411Pages:9
Abstract

Zeolites have been widely used in the adsorption and removal of volatile organic compounds (VOCs). In this study, we investigated the adsorption properties of 9 commercial zeolites and MCM-41 mesoporous silica for pxylene. And then zeolites with hierarchical structures were prepared by alkali (0.1-0.8 mol center dot L-1 mixed alkali solution) modification and their adsorption and desorption properties were investigated for various VOCs. The structure of these materials was thoroughly characterized, and the relationship between the adsorption capacity and physical parameters was investigated. It was found that the pore diameter and Si/Al ratio were the most important parameters for p-xylene adsorption under humid conditions, which should be optimized simultaneously to achieve satisfactory adsorption capacity. And the best adsorption capacity could reach approximately 100 mg center dot g(-1) in humid conditions. Meanwhile, enhancing the diffusion of the VOC molecules in microporous zeolites with micron crystals through the manufacture of hierarchical structure was also important. The adsorption capacity of the modified zeolites increased by more than 25%, and the desorption temperature decreased. It showed that the alkali modification not only improved the utilization efficiency of the adsorption sites, but also facilitated desorption, which is crucial for adsorbing materials.

KeywordZeolite Hydrophobic Hierarchical Adsorption Vocs
DOI10.1016/j.cej.2021.128558
Language英语
Funding ProjectNational Natural Science Foundation of China[51708540] ; National Natural Science Foundation of China[51938014] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-ZS-2017-6-2] ; Beijing Science and Technology Planning Project[Z191100009119008]
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Beijing Science and Technology Planning Project
WOS IDWOS:000624685400004
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/47940
Collection中国科学院过程工程研究所
Corresponding AuthorWang, Jian; Xu, Wenqing
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Innovat Acad Green Manufacture, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Xianfeng,Wang, Jian,Guo, Yangyang,et al. Adsorption and desorption characteristics of hydrophobic hierarchical zeolites for the removal of volatile organic compounds[J]. CHEMICAL ENGINEERING JOURNAL,2021,411:9.
APA Li, Xianfeng,Wang, Jian,Guo, Yangyang,Zhu, Tingyu,&Xu, Wenqing.(2021).Adsorption and desorption characteristics of hydrophobic hierarchical zeolites for the removal of volatile organic compounds.CHEMICAL ENGINEERING JOURNAL,411,9.
MLA Li, Xianfeng,et al."Adsorption and desorption characteristics of hydrophobic hierarchical zeolites for the removal of volatile organic compounds".CHEMICAL ENGINEERING JOURNAL 411(2021):9.
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