Developing Advanced Mg‐Based Solid‐State Materials for Gas Separation and Purification: A Review
Ning Zhang, Xi Lin, Zhigang Hu, Wenjiang Ding, Jianxin Zou
Abstract
ABSTRACT Magnesium (Mg) is globally abundant in resources, and Mg‐based compounds—such as magnesium based hydrides, hydroxides, oxides, and magnesium metal‐organic frameworks (Mg MOFs)—have shown significant application prospects in gas separation. This is largely due to the electronic characteristics of Mg or Mg 2 ⁺ ions, which facilitate the capture of hydrogen (H 2 ) and acidic gases such as carbon dioxide (CO 2 ) and sulfur dioxide (SO 2 ) from other gases. Consequently, exploring the use of Mg‐based materials in gas separation and purification applications could not only advance the scientific understanding of solid‐gas interaction mechanisms but also provide cost‐effective solutions for gas separation technology at an industrial level. This review summarizes the recent practices and explorations of Mg‐based solid‐state materials in various gas separation and purification methods, including physical adsorption‐based separation, chemical absorption‐based separation, and membrane‐based separation. For each separation method, the relevant Mg‐based materials are discussed in detail, and key findings from existing research are presented and analyzed. Additionally, inspired by the straightforward design of air‐stable hydrogen storage materials, this review specifically addresses anti‐passivation strategies for Mg‐based hydrides, which are crucial for their applications in hydrogen gas separation and purification. Finally, this review highlights key issues and fields for future research and development in Mg‐based gas separation materials.