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首页> 外文期刊>ACS catalysis >Bifunctional Strategy Coupling Y2O3-Catalyzed Alkanal Decomposition with Methanol-to-Olefins Catalysis for Enhanced Lifetime
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Bifunctional Strategy Coupling Y2O3-Catalyzed Alkanal Decomposition with Methanol-to-Olefins Catalysis for Enhanced Lifetime

机译：双官能策略偶联Y2O3催化的烷醛分解与甲醇 - 烯烃催化加强寿命

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摘要

Bifunctional strategies exploiting the selective and catalytic decomposition of formaldehyde by Y2O3 improve 1 the lifetime of CHA zeotypes and zeolites for methanol-to olefins catalysis 4-fold, as quantified by total turnovers, without disrupting the inherently high selectivity to light olefins. The improvement in catalyst lifetime increases with increasing proximity between H+ sites of the zeotype/zeolite and the surface of the rare earth metal oxide. This proximity effect demonstrates crucial transport of formaldehyde between and within zeotypic/zeolitic domains on catalyst lifetime. These results provide mechanistic insights revealing formaldehyde as an accelerant for the initiation and termination of chain carriers and exemplify a strategy for designing improved methanol-to olefins catalysts by optimizing (bi)functionality and reaction-transport dynamical phenomena.
机译：利用Y2O3利用甲醛的选择性和催化分解的双官能策略改善了甲醇 - 烯烃的寿命和甲醇 - 烯烃催化剂4倍，通过总损失量化，而不会破坏对光烯烃固有的高选择性。 催化剂寿命的改善随着沸石/沸石的H +位点和稀土金属氧化物的表面之间的接近程度而增加。 该接近效应表明甲醛与ZeoTypic / Zeolitic结构域之间的关键转运催化剂寿命。 这些结果提供了机械洞察力，揭示甲醛作为链链载体的启动和终止的促进剂，并通过优化（Bi）官能度和反应运输动力现象来设计改进的甲醇至烯烃催化剂的策略。

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