对 MOF UiO-66-NH₂ 膜进行后合成修饰以实现高效甲醇/有机物分离

IF 8.4 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science Pub Date : 2024-11-01 DOI:10.1016/j.memsci.2024.123475

Langhui Wu , Ye Liang , Bo Zhang , Shenzhen Cong , Shenyi Tang , Kangkang Jiang , Liping Luan , Zhi Wang , Xinlei Liu

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引用次数: 0

摘要

在化学工业中，MeOH/有机混合物的分离是一项重大挑战。本研究采用二次溶热法制备了金属有机框架 UiO-66-NH2 膜，用于分离 MeOH/DMC、MeOH/Tol 和 MeOH/MTBE。通过草酰氯（OC）、丁二酸酰氯（SC）和水杨醛（SA）进行合成后改性，膜的性能得到了显著提高。改性后的 UiO-66-NH2-OC 和 UiO-66-NH2-SC 膜同时提高了分离因子和 MeOH 通量。改性 UiO-66-NH2-SA 膜的分离因数提高了一个数量级，MeOH 通量与之相当。具体来说，UiO-66-NH2-SA 膜在 40 °C 下分离 5/95 wt% MeOH/Tol 和 5/95 wt% MeOH/MTBE 时，分离因子分别为 3220 和 28000，MeOH 通量分别为 1.18 kg m-2 h-1 和 1.03 kg m-2 h-1。此外，UiO-66-NH2-SA 膜在 120 小时的评估中表现出良好的稳定性。这项研究为高效分离甲醇/有机物提供了一种前景广阔的后合成方法和一类膜材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Post-synthetic modification of MOF UiO-66-NH₂ membranes for efficient methanol/organic separation

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Post-synthetic modification of MOF UiO-66-NH₂ membranes for efficient methanol/organic separation

The separation of MeOH/organic mixtures poses a significant challenge in the chemical industry. In this study, metal-organic framework UiO-66-NH₂ membranes prepared by a secondary solvothermal method were employed for MeOH/DMC, MeOH/Tol and MeOH/MTBE separation. The membrane performance was significantly boosted by post-synthetic modification with oxalyl chloride (OC), succinyl chloride (SC), and salicylaldehyde (SA). The modified UiO-66-NH₂-OC and UiO-66-NH₂-SC membranes displayed simultaneous improvement of the separation factors and MeOH fluxes. The modified UiO-66-NH₂-SA membranes exhibited an order of magnitude enhancement of separation factors, with comparable MeOH fluxes. Specifically, separation factors of 3220 and 28,000 with MeOH fluxes of 1.18 kg m⁻² h⁻¹and 1.03 kg m⁻² h⁻¹ for 5/95 wt% MeOH/Tol and 5/95 wt% MeOH/MTBE separation at 40 °C, respectively, were delivered by UiO-66-NH₂-SA membranes. Moreover, the UiO-66-NH₂-SA membranes demonstrated good stability over 120 h's evaluation. This study offers a promising post-synthetic approach and a class of membrane materials for efficient MeOH/organic separation.

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来源期刊

Journal of Membrane Science 工程技术-高分子科学

CiteScore

17.10

自引率

17.90%

发文量

1031

审稿时长

2.5 months

期刊介绍： The Journal of Membrane Science is a publication that focuses on membrane systems and is aimed at academic and industrial chemists, chemical engineers, materials scientists, and membranologists. It publishes original research and reviews on various aspects of membrane transport, membrane formation/structure, fouling, module/process design, and processes/applications. The journal primarily focuses on the structure, function, and performance of non-biological membranes but also includes papers that relate to biological membranes. The Journal of Membrane Science publishes Full Text Papers, State-of-the-Art Reviews, Letters to the Editor, and Perspectives.