Assessing the efficiency of zeolites in BTEX adsorption: Impact of pore structure and humidity in single and multicomponent systems

IF 4.7 3区材料科学 Q1 CHEMISTRY, APPLIED Microporous and Mesoporous Materials Pub Date : 2025-02-15 Epub Date: 2024-12-17 DOI:10.1016/j.micromeso.2024.113462

Maria Luisa Feo , Massimiliano Frattoni , Ester Paoloacci , Maria Masiello , Giulio Esposito , Rafael Gonzalez-Olmos , Emanuela Tempesta , Francesca Trapasso , Emiliano Zampetti , Marco Torre , Ettore Guerriero , Valerio Paolini

{"title":"Assessing the efficiency of zeolites in BTEX adsorption: Impact of pore structure and humidity in single and multicomponent systems","authors":"Maria Luisa Feo , Massimiliano Frattoni , Ester Paoloacci , Maria Masiello , Giulio Esposito , Rafael Gonzalez-Olmos , Emanuela Tempesta , Francesca Trapasso , Emiliano Zampetti , Marco Torre , Ettore Guerriero , Valerio Paolini","doi":"10.1016/j.micromeso.2024.113462","DOIUrl":null,"url":null,"abstract":"<div><div>Among volatile organic compounds (VOCs), benzene, toluene, ethylbenzene and <em>o</em>-xylene (BTEX) have attracted global attention because of their high toxicity to the environment and human health. Adsorption is considered one of the most efficient, simple and low-cost technology for VOC pollution control and zeolites have been commonly used as adsorbent for this purpose. However, the evaluation of the performance of zeolites in the adsorption of BTEX under realistic conditions such as the presence of humidity or multicomponent systems has been poorly addressed. In this study, the adsorption capacity of BTEX of seven zeolites belonging to the structural families LTA, MFI, BETA, MOR and FAU have been investigated. Zeolites have been characterized by X-ray fluorescence and nitrogen sorption measurements. The relationship between the adsorption capacity and physicochemical parameters was investigated. It was found that MFI structure was the best adsorbent for benzene and toluene reaching an adsorption capacity of 69.2 mg/g. Whereas FAU structure exhibited preference to trap ethylbenzene and <em>o</em>-xylene adsorbing up to 93.8 mg/g. Specific surface area and pore diameter of zeolites were found to be the most important parameter for BTEX adsorption. The properties of the adsorbate (molecular structure, polarity and boiling point) played also a key role in adsorption.</div><div>Si/Al ratio was a key factor in determining adsorption performance under humidity conditions with the best adsorption capacity reaching 16.9 mg/g. In multi-component system, the adsorption capacity of zeolites decreased more than 14 %. The results obtained may guide to select proper adsorbent for BTEX in real applications.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"384 ","pages":"Article 113462"},"PeriodicalIF":4.7000,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microporous and Mesoporous Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1387181124004840","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/12/17 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}

引用次数: 0

Abstract

Among volatile organic compounds (VOCs), benzene, toluene, ethylbenzene and o-xylene (BTEX) have attracted global attention because of their high toxicity to the environment and human health. Adsorption is considered one of the most efficient, simple and low-cost technology for VOC pollution control and zeolites have been commonly used as adsorbent for this purpose. However, the evaluation of the performance of zeolites in the adsorption of BTEX under realistic conditions such as the presence of humidity or multicomponent systems has been poorly addressed. In this study, the adsorption capacity of BTEX of seven zeolites belonging to the structural families LTA, MFI, BETA, MOR and FAU have been investigated. Zeolites have been characterized by X-ray fluorescence and nitrogen sorption measurements. The relationship between the adsorption capacity and physicochemical parameters was investigated. It was found that MFI structure was the best adsorbent for benzene and toluene reaching an adsorption capacity of 69.2 mg/g. Whereas FAU structure exhibited preference to trap ethylbenzene and o-xylene adsorbing up to 93.8 mg/g. Specific surface area and pore diameter of zeolites were found to be the most important parameter for BTEX adsorption. The properties of the adsorbate (molecular structure, polarity and boiling point) played also a key role in adsorption.

Si/Al ratio was a key factor in determining adsorption performance under humidity conditions with the best adsorption capacity reaching 16.9 mg/g. In multi-component system, the adsorption capacity of zeolites decreased more than 14 %. The results obtained may guide to select proper adsorbent for BTEX in real applications.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

评估沸石对BTEX的吸附效率：单组分和多组分系统中孔隙结构和湿度的影响

在挥发性有机化合物（VOCs）中，苯、甲苯、乙苯和邻二甲苯（BTEX）因其对环境和人体健康的高毒性而受到全球关注。吸附被认为是控制挥发性有机化合物污染的最有效、简单和低成本的技术之一，沸石已被广泛用作吸附剂。然而，在实际条件下，如存在湿度或多组分系统，沸石吸附BTEX的性能评估一直没有得到很好的解决。本研究考察了LTA、MFI、BETA、MOR和FAU等结构族分子筛对BTEX的吸附能力。通过x射线荧光和氮吸附测量对沸石进行了表征。考察了吸附量与理化参数的关系。结果表明，MFI结构对苯和甲苯的吸附性能最好，吸附量为69.2 mg/g。而FAU结构对乙苯和邻二甲苯的吸附能力最高可达93.8 mg/g。沸石的比表面积和孔径是影响BTEX吸附性能的最重要参数。吸附物的性质（分子结构、极性和沸点）对吸附也起着关键作用。湿条件下硅铝比是决定吸附性能的关键因素，最佳吸附量达到16.9 mg/g。在多组分体系中，沸石的吸附量下降了14%以上。所得结果可指导实际应用中BTEX吸附剂的选择。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.