Catalytic dehydrogenation of ethane is a promising non-petroleum route to produce ethylene but it suffers from insufficient conversion at mild temperatures because of the thermodynamic equilibrium limitation, leading to the high cost of product separation. Here, we developed a reaction process by interleaving the cobaltosilicate zeolite catalyst (CoS-1) for non-oxidative dehydrogenation and sodium tungstate-modified manganese oxide promoter (MnO_x@Na₂WO₄) for selective hydrogen combustion in multiple beds as a domino mode in the reactor. The ethane dehydrogenation and hydrogen consumption occurred alternately on the spatially separated sites, which efficiently promoted ethane dehydrogenation by shifting the equilibrium to improve the ethane conversion with hindered excessive hydrocarbon combustion. As a result, the per-pass ethane conversion up to 43.2% and ethylene selectivity at 93.1% were achieved at 590°C with 0.8 bar of ethane feed. This domino process would provide an efficient strategy for boosting the thermodynamically limited reactions and improving the vitality of the catalytic dehydrogenation of ethane.

乙烷催化脱氢是一种很有前途的非石油乙烯生产途径，但由于热力学平衡的限制，它在温和的温度下转化率不足，导致产品分离成本高。在这里，我们开发了一种反应过程，将用于非氧化脱氢的钴硅酸盐沸石催化剂 (CoS-1) 和用于多床选择性氢燃烧的钨酸钠改性锰氧化物促进剂 (MnO x @Na 2 WO ₄ )_作为多米诺_骨牌交织在一起反应器中的模式。乙烷脱氢和氢气消耗在空间上分离的位置交替发生，通过平衡转移有效促进乙烷脱氢，提高乙烷转化率，抑制烃类过度燃烧。结果，在 590°C 和 0.8 bar 的乙烷进料下，单程乙烷转化率高达 43.2%，乙烯选择性达到 93.1%。这种多米诺骨牌过程将为促进热力学限制的反应和提高乙烷催化脱氢的活力提供有效的策略。