沸石合成后酸位点调控策略及其在VOCs催化氧化中应用进展
Advances in Acid Site Modulation Strategy after Zeolite Synthesis and Its Application in Catalytic Oxidation of VOCs
王健祥 1袁建华 1刘晓 2杨芸 2于飞 3马杰1
作者信息
- 1. 同济大学环境科学与工程学院,上海 200092
- 2. 上海宝冶工程技术有限公司,上海 200941
- 3. 上海海洋大学海洋生态与环境学院,上海 201306
- 折叠
摘要
挥发性有机化合物(VOCs)是一种常见的工业排放污染源,对人体健康、生态系统有着极强的毒害性.催化氧化是一种节能高效的VOCs去除方法,其关键在于催化剂设计和开发.沸石中酸位点能降低VOCs氧化反应活化能,有效催化VOCs氧化降解,但原始沸石的催化性能无法满足VOCs催化需求.通过合成后调控策略,可使沸石中酸位点密度更高,使其分布更有利于VOC分子和催化位点的接触,从而令沸石催化剂具有更加优异的催化性能.本文首先介绍了沸石中酸位点的形成和酸位点密度、类型的表征技术,之后着重介绍了沸石合成后酸位点的调控策略,包括骨架改性和内外表面改性等,最后列举了通过调控策略得到的沸石催化剂对VOCs的催化性能.在以上内容的基础上,展望了沸石合成后酸位点调控策略未来的研究方向,对推动沸石催化剂应用于工业VOCs高效催化氧化有重要意义.
Abstract
Volatile organic compounds(VOCs)are a common source of pollution from industrial emissions,which are extremely toxic to human health and ecosystems.Catalytic oxidation is an energy-saving and efficient method for VOCs removal,and its key lies in catalyst design and development.The acid sites in zeolites can reduce the activation energy of VOCs oxidation reaction and effectively catalyze the oxidative degradation of VOCs,but the catalytic performance of pristine zeolites cannot meet the demand for VOCs catalysis.Through the post-synthesis modulation strategy,the density of acid sites in zeolites can be made higher,and their distribution is more favorable for the contact between VOC molecules and catalytic sites,so that the zeolite catalysts have more excellent catalytic performance.This review firstly introduces the formation of acid sites in zeolites and the techniques of characterizing the density and type of acid sites,and then focuses on the modulation strategies of acid sites after zeolite synthesis,including framework modification and internal/external surface modification,etc.Finally,this review lists the catalytic performances of zeolite catalysts obtained by the modulation strategies for VOCs.On the basis of the above,the future research direction of the acid site modulation strategies after zeolite synthesis is envisioned,which is of great significance to promote the application of zeolite catalysts in the efficient catalytic oxidation of industrial VOCs
关键词
沸石/挥发性有机化合物/酸位点/调控/催化氧化Key words
zeolite/volatile organic compound/acid site/modulation/catalytic oxidation引用本文复制引用
基金项目
国家自然科学基金(22276137)
上海市科学技术委员会科技创新行动计划项目(21SQBS01100)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据