Hashimoto Taiki, Asada Takahiro, Ogoshi Sensuke, Hoshimoto Yoichi
Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
Sci Adv. 2022 Oct 28;8(43):eade0189. doi: 10.1126/sciadv.ade0189. Epub 2022 Oct 26.
Molecular hydrogen (H) is one of the most important energy carriers. In the midterm future, a huge amount of H will be produced from a variety of hydrocarbon sources through conversion and removal of contaminants such as CO and CO. However, bypassing these purification processes is desirable, given their energy consumption and environmental impact, which ultimately increases the cost of H. Here, we demonstrate a strategy to separate H from a gaseous mixture of H/CO/CO/CH that can include an excess of CO and CO relative to H and simultaneously store it in N-heterocyclic compounds that act as liquid organic hydrogen carriers (LOHCs), which can be applied to produce H by subsequent dehydrogenation. Our results demonstrate that LOHCs can potentially be used for H purification from CO- and CO-rich crude H in addition to their well-established use in H storage.
分子氢（H₂）是最重要的能量载体之一。在中期未来，将通过转化和去除诸如CO和CO₂等污染物，从各种碳氢化合物源中生产大量的H₂。然而，考虑到这些净化过程的能源消耗和环境影响，而这些最终会增加H₂的成本，因此绕过这些净化过程是可取的。在这里，我们展示了一种从H₂/CO/CO₂/CH₄气态混合物中分离H₂的策略，该混合物中CO和CO₂相对于H₂可能过量，同时将其存储在作为液体有机氢载体（LOHC）的N-杂环化合物中，随后通过脱氢可用于生产H₂。我们的结果表明，除了在H₂储存方面已确立的用途外，LOHC还可潜在地用于从富含CO和CO₂的粗H₂中纯化H₂。
