This work analysed the permeation of binary and ternary H2-containing mixtures through a SAPO-34 membrane, aiming at investigating how hydrogen influences and its permeation is influenced by the presence of the other gaseous species, such as CO2 and CH4. We considered the behaviour of various gas mixtures in terms of permeability and selectivity at various temperatures (25-300 degrees C), feed pressures (400-1000 kPa) and compositions by means of an already validated mass transport model, which is based on surface and gas translation diffusion. We found that the presence of CO2 and CH4 in the H2-containing mixtures influences in a similar way the H2 permeation, reducing its permeability of about 80 compared to the single-gas value because of their stronger adsorption. On the other hand, H2 promotes the permeation of CO2 and CH4, causing an increment of their permeability with respect to those as single gases. These combined effects reflected in interesting selectivity values in binary mixture (e.g., CO2/H2 about 11 at 25 degrees C, H2/CH4 about 9 at 180 degrees C), which showed the potential of SAPO-34 membranes in treating of H2 -con-taining mixtures.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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机译：这项工作分析了含二元和三元 H2 的混合物通过 SAPO-34 膜的渗透，旨在研究氢如何影响其渗透，并受到其他气态物质（如 CO2 和 CH4）的影响。我们通过已经验证的质量传递模型（基于表面和气体平移扩散）考虑了各种气体混合物在不同温度（25-300°C）、进料压力（400-1000 kPa）和成分方面的渗透性和选择性。我们发现，含 H2 的混合物中 CO2 和 CH4 的存在以类似的方式影响 H2 渗透，由于它们的吸附性更强，与单一气体值相比，其渗透率降低了约 80%。另一方面，H2 促进 CO2 和 CH4 的渗透，导致它们相对于单一气体的渗透性增加。这些综合效应反映在二元混合物中有趣的选择性值（例如，CO2/H2 在 25 °C 时约为 11，H2/CH4 在 180 °C 时约为 9），这表明 SAPO-34 膜在处理 H2 保留混合物方面的潜力。（c） 2022 Hydrogen Energy Publications LLC. 由 Elsevier Ltd. 出版。保留所有权利。
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