Efficient construction and transfer mechanism of high-flux ceramic membranes for membrane distillation

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science Pub Date : 2025-07-17 DOI:10.1016/j.memsci.2025.124445

Kai Miao , Shiyuan Liu , Hengxin Li , Kecheng Guan , Dong Zou , Hideto Matsuyam

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引用次数: 0

Abstract

Ceramic membranes have great potential to be used for treating saline water via membrane distillation. However, ceramic membranes with high transfer resistance always lead to the low water flux compared with polymer membranes. To decrease the mass transfer resistance and improve the water flux, a novel “transferring” method was proposed to fabricate high-flux ceramic membranes by finely-tuning the vapor water transfer resistance in this work. It was demonstrated that increasing the pore size of ceramic support and decreasing the thickness of membrane layer can effectively reduce the transfer resistance and improve the water flux. Furthermore, the ceramic support pore size and membrane layer thickness were mainly regulated and investigated. Specifically, computational fluid dynamics (CFD) simulation and theoretical collision behavior of water vapor molecules were conducted to clarify the transfer mechanism of ceramic membrane in membrane distillation. The maximum water flux of the resulting SiC membranes was 32.05 kg⋅m⁻²⋅h⁻¹ in the treatment of saline water with the salt rejection of 99.96%, which showed superiority compared with the literature. In general, this work provided an important strategy to fabricate high-permeance ceramic membranes for membrane distillation.

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膜蒸馏高通量陶瓷膜的高效构建及传递机理研究

陶瓷膜在膜蒸馏法处理含盐水方面具有很大的应用潜力。然而，陶瓷膜具有较高的传递阻力，与聚合物膜相比，往往导致水通量较低。为了降低传质阻力，提高水通量，本文提出了一种通过微调蒸汽水传递阻力来制备高通量陶瓷膜的“传质”方法。结果表明，增大陶瓷支架孔径，减小膜层厚度，可以有效降低传递阻力，提高水通量。此外，还对陶瓷载体孔径和膜层厚度进行了调控和研究。具体而言，通过计算流体力学（CFD）模拟和理论碰撞水蒸气分子行为来阐明膜蒸馏过程中陶瓷膜的传递机理。所得SiC膜处理含盐水的最大水通量为32.05 kg⋅m−2⋅h−1，除盐率为99.96%，与文献相比具有优势。本研究为制备膜蒸馏用高渗透陶瓷膜提供了一条重要途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.