基于酸/聚乙烯胺修饰与石墨烯氧化物进行乙醇脱水的聚电解质复合物的透气膜
Mariia Dmitrenko1, Olga Mikhailovskaya1, Roman Dubovenko1
1St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia.
Polymers
|May 11, 2024
概括
使用藻酸盐,聚乙烯胺和石墨烯氧化物开发了用于生物酒精脱水的高效膜. 这些增强的膜显示了对蒸发乙醇脱水的改善流量和选择性.
科学领域:
- 膜科学与技术 膜科学与技术
- 可再生能源可再生能源是可再生能源.
- 分离过程 分离过程.
背景情况:
- 蒸发是生物酒精脱水的关键技术,对于可再生能源应用至关重要.
- 发展稳定和高效的膜对于有效的生物酒精脱水至关重要.
- 研究了用聚乙烯胺 (PEI) 和石墨烯氧化物 (GO) 修改的酸盐 (SA) 膜.
研究的目的:
- 开发高效的膜,以增强乙醇的蒸发脱水.
- 研究PEI和GO修改对膜特性和性能的影响.
- 为了创建支持膜,提高透性和选择性.
主要方法:
- 用聚乙烯胺修改基酸盐以形成多电解质复合物 (PEC).
- 将石墨烯氧化物 (GO) 纳入PEC/SA矩阵.
- 使用光谱,显微镜,热分析和计算方法对膜结构,物理化学性质和运输行为进行表征.
- 使用多孔的多烯二基底制造支膜.
主要成果:
- 用PEI和GO进行修改改变了膜结构和物理化学性质.
- 计算研究表明GO,PEI和水之间有良好的相互作用,提高了性能.
- 最佳的PEC/GO复合物 (2.5%) 用于在多孔基板上创建一个薄而密集的层.
- 交叉连接的支膜表现出两倍以上的透流量和99.7%以上的重量%的水选择性.
结论:
- 开发的SA/PEI/GO复合膜为蒸发乙醇脱水提供了增强的性能.
- 支持膜在流量,选择性和稳定性方面表现出显著的改善.
- 这些发现有助于推进可再生能源的高效生物酒精脱水技术.
相关概念视频
02:29Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis
10.3K
Overview
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
10.3K
02:35Acid-Catalyzed Dehydration of Alcohols to Alkenes
19.6K
In a dehydration reaction, a hydroxyl group in an alcohol is eliminated along with the hydrogen from an adjacent carbon. Here, the products are an alkene and a molecule of water. Dehydration of alcohols is generally achieved by heating in the presence of an acid catalyst. While the dehydration of primary alcohols requires high temperatures and acid concentrations, secondary and tertiary alcohols can lose a water molecule under relatively mild conditions.
19.6K