Considerable efforts have been devoted to developing adsorbents capable of retain CO₂ either via direct capture from air, or via more sophisticated systems such as biogas, a mixture from which methane can be upgraded. In this work, we present an experimental investigation of zeolite NaA, grown over alkaline-treated fiberglass, synthesized by means of hydrothermal route and tested as adsorbent for CO₂ removal in the CO₂/CH₄ mixture. Zeolite NaA was successfully obtained, with absence of secondary phases, as detailed by the characterization results. Adsorption experiments, presented in terms of isotherms, demonstrated the potential of the synthesized material as a selective CO₂ adsorbent with potential to be applied for biogas enrichment.

人们投入了大量精力来开发能够通过直接从空气中捕获二氧化碳或通过更复杂的系统（例如沼气）来保留二氧化碳的吸附剂，沼气是一种可以升级甲烷的混合物。在这项工作中，我们对 NaA 沸石进行了实验研究，该沸石在碱处理的玻璃纤维上生长，通过水热途径合成，并作为 CO2/CH4 混合物中 CO2 去除的吸附剂进行了测试。成功获得了 NaA 沸石，如表征结果所详述，不存在第二相。以等温线表示的吸附实验证明了合成材料作为选择性 CO2 吸附剂的潜力，并有可能应用于沼气富集。