Equilibrium and dynamic adsorption characteristics of zeolite 5A, LiX, 13X and MOF UTSA-16 adsorbents for hydrogen purification

作者：Chenglong Li, Hao Luo, Yupeng Yuan, Liang Tong, Ben Chen, Tianqi Yang, Chengqing Yuan, Richard Chahine, Jinsheng Xiao · 发表于：International Journal of Hydrogen Energy · 年份：2025 · DOI：10.1016/j.ijhydene.2025.04.022 · 被引用次数：14 · 研究领域：Catalytic Processes in Materials Science、Zeolite Catalysis and Synthesis、Membrane Separation and Gas Transport

Zeolite materials are widely used as adsorbents in pressure swing adsorption (PSA) technology for hydrogen purification, particularly excelling in removing weakly adsorbed gases such as N 2 and CO. The selection of zeolite materials is crucial for enhancing the performance of hydrogen purification. This study investigates the adsorption capacity , selectivity and working capacity of three widely used zeolite adsorbents (5A, LiX and 13X) and a zeolite-like material (UTSA-16) for hydrogen purification from steam methane reforming off-gas (SMROG), composed of H 2 /CO 2 /CH 4 /CO = 73/16/8/3 mol%. The results indicate that, based on adsorption isotherms , Zeolite LiX exhibits the strongest adsorption capacity for CH 4 and CO. From the perspective of selectivity, LiX demonstrates the highest S (CO2+CH4+CO)/H2 value, making it preliminarily identified as an ideal adsorbent for hydrogen purification. In terms of working capacity, UTSA-16 shows the highest working capacity for CO 2 and CH 4 , making it more suitable for scenarios involving the removal of CO 2 in layered adsorption bed designs, while 13X exhibits the highest working capacity for CO. To further evaluate the dynamic performance of these adsorbents for hydrogen purification, the adsorption, heat and mass transfer model for multi-component gas mixtures was established by Aspen Adsorption software. The simulation results align well with experimental data. In the analysis of the dynamic adsorption characteristics of typical...