Abstract Direct conversion of alkanes into valuable chemicals has attracted significant interest in recent decades by academia and industry alike due to the vast economic potential. One type of such conversions is non-oxidative dehydrogenation (NODH), which is deemed advantageous over its oxidative counterpart in conversion and selectivity. However, coking-related degradation is a major challenge to the NODH route. We here demonstrate an efficient and selective ethane-to-ethylene conversion membrane reactor operating on NODH and a mixed electron and proton conductor (MEPC) having a composition of BaCo0.4Fe0.4Zr0.1Y0.1O3 (BCFZY). The H2 produced from NODH is instantly removed by BCFZY, thus shifting the equilibrium to maximize conversion and selectivity. The results show that the single-pass ethane-to-ethylene conversion, ethylene selectivity and product yield at 700 °C are 70, 90 and 63%, respectively, with a moistened ethane as the feedstock. During a 100-h durability testing, there is virtually no degradation observed in membrane performance.

中文翻译：

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质子和电子混合导电膜辅助的高效和选择性乙烷到乙烯的转化

摘要 近几十年来，由于巨大的经济潜力，将烷烃直接转化为有价值的化学品引起了学术界和工业界的极大兴趣。此类转化的一种类型是非氧化脱氢 (NODH)，它被认为在转化率和选择性方面优于其氧化对应物。然而，与焦化相关的降解是 NODH 路线的主要挑战。我们在这里展示了一种高效且选择性的乙烷到乙烯转化膜反应器，该反应器在 NODH 和混合电子和质子导体 (MEPC) 上运行，其组成为 BaCo0.4Fe0.4Zr0.1Y0.1O3 (BCFZY)。从 NODH 产生的 H2 会立即被 BCFZY 去除，从而改变平衡以最大限度地提高转化率和选择性。结果表明，单程乙烷到乙烯的转化率，以湿润的乙烷为原料，700 °C 下的乙烯选择性和产品收率分别为 70%、90% 和 63%。在 100 小时的耐久性测试中，几乎没有观察到膜性能下降。