以亚氨基二磺酸四钠为配体增强Fe-MFI沸石在湿润条件下对甲苯的吸附选择性

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-01-23 DOI:10.1016/j.seppur.2025.131772

Haoran Sun, Jie Zhong, Hengxu Guo, Yipu Xu, Ziyang Liu, Anmin Zheng, Peng Peng, Zifeng Yan

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引用次数: 0

摘要

通过沸石选择性吸附挥发性有机化合物（VOC）以减轻其对公众健康和环境的威胁至关重要。然而，实际的VOC去除过程通常在潮湿的条件下进行，在这种条件下，竞争性的水吸附总是不可避免的。本研究以亚氨基二磺酸四钠（IDS）为配体，通过浸渍法制备了一种低亲水性的含铁MFI沸石样品。以甲苯为模型化合物对含铁MFI分子筛进行的突破性分析表明，与高亲水性分子筛相比，含铁MFI分子筛在潮湿条件下对甲苯的吸附选择性显著提高。各种表征技术证实，铁可以通过形成Fe-O-Si相互作用嵌入到Si-MFI分子筛框架中，从而修复硅烷醇巢相关缺陷。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Enhanced toluene adsorption selectivity of Fe-MFI zeolite under humid conditions using tetrasodium iminodisuccinate as ligand

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Enhanced toluene adsorption selectivity of Fe-MFI zeolite under humid conditions using tetrasodium iminodisuccinate as ligand

It is of vital importance to selectively adsorb volatile organic compounds (VOC) via zeolite in order to alleviate their threats to both the public health and environment. However, practical VOC removal processes are often conducted under humid conditions where competitive water adsorption is always unavoidable. In this study, a Fe-containing MFI zeolite sample with less water affinity was prepared via an impregnation method with the help of tetrasodium iminodisuccinate (IDS) as a ligand. The breakthrough analysis of the Fe-containing MFI zeolite using toluene as a model compound for VOC showed that it has a significant increase in toluene adsorption selectivity under humid conditions compared to its high water affinity counterparts. Various characterization techniques confirmed that the iron species can heal the silanol nests related defects within Si-MFI zeolite by embedding into the framework via forming Fe-O-Si interaction.

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.