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Facile Preparation of Ultrafine Aluminum Hydroxide Particles with or without Mesoporous MCM-41 in Ambient Environments
Published on: May 11, 2017
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Ionic liquid-modified MCM-41-polymer mixed matrix membrane for butanol pervaporation
Yifang Li1, Dandan Yan2, Yanhui Wu2
1Shanghai Shenglan Petrochemical Engineering Technology Co. Ltd, Shanghai 201200, People's Republic of China.
Royal Society Open Science
|August 17, 2019
Summary
Ionic liquids modified MCM-41 enhance polymer membranes for efficient butanol separation. The resulting mixed matrix membranes show improved flux and selectivity, demonstrating high stability for pervaporation applications.
Area of Science:
- Materials Science
- Chemical Engineering
- Separation Science
Background:
- Ionic liquids (ILs) show promise for butanol separation due to selective properties.
- Mesoporous molecular sieves like MCM-41 are explored as supports for ILs.
- Mixed matrix membranes (MMMs) offer tunable performance for pervaporation.
Purpose of the Study:
- To modify MCM-41 with two specific ionic liquids: [EVIM][Tf2N] and [OMPY][Tf2N].
- To fabricate and evaluate PEBA-based MMMs incorporating IL-modified MCM-41 for butanol pervaporation.
- To investigate the impact of IL-modified MCM-41 content and operating conditions on membrane performance.
Main Methods:
- Synthesis and characterization of IL-modified MCM-41 using XPS, BET, XRD, SEM, and TEM.
- Fabrication of PEBA mixed matrix membranes with varying loadings of MCM-41-IL2.
- Pervaporation experiments to determine permeation flux and separation factor under different conditions.
Main Results:
- IL-modified MCM-41 incorporation enhanced PEBA membrane pervaporation performance.
- The 5% MCM-41-IL2-PEBA membrane achieved a flux of 421.7 g m⁻² h⁻¹ and a separation factor of 25.4 at 35°C and 2.5 wt% butanol.
- Performance metrics (flux and selectivity) increased with feeding liquid temperature.
- The membrane demonstrated excellent stability over 100 hours of operation.
Conclusions:
- IL-modified MCM-41 is an effective filler for enhancing PEBA membranes in butanol pervaporation.
- Optimized MMMs offer a promising route for efficient and stable butanol separation.
- Temperature is a critical operating parameter influencing pervaporation efficiency.
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