Selective hydrogen combustion (SHC) in the presence of light hydrocarbons was demonstrated with a series of Mn‐containing mixed oxide redox catalysts in the context of a chemical looping‐oxidative dehydrogenation scheme. Unpromoted and 20 wt % Na₂WO₄‐promoted Mg₆MnO₈, SrMnO₃, and CaMnO₃ exhibited varying SHC capabilities at temperatures between 550 and 850°C. Reduction temperature of unpromoted redox catalysts increased in the order Mg₆MnO₈ < SrMnO₃ < CaMnO₃. Promotion with 20 wt % Na₂WO₄ resulted in more selective redox catalysts capable of high‐temperature SHC. XPS analysis revealed a correlation between suppression of near‐surface Mn and SHC selectivity. Na₂WO₄/CaMnO₃ showed steady SHC performance (89% H₂ conversion, 88% selectivity) at 850°C over 50 redox cycles. In series with a Cr₂O₃/Al₂O₃ ethane dehydrogenation catalyst, Na₂WO₄/CaMnO₃ combusted 84% of H₂ produced while limiting CO_x yield below 2%. The redox catalysts reported can be suitable for SHC in a cyclic redox scheme for the production of light olefins from alkanes. © 2018 American Institute of Chemical Engineers AIChE J, 64: 3141–3150, 2018

中文翻译：

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循环氧化还原方案下用于选择性氢燃烧的含锰氧化还原催化剂

在化学环氧化脱氢方案的背景下，用一系列含锰的混合氧化物氧化还原催化剂证明了在轻烃存在下的选择性氢燃烧（SHC）。未经促进的和20 wt％Na ₂ WO ₄促进的Mg ₆ MnO ₈，SrMnO ₃和CaMnO ₃在550至850°C的温度下表现出不同的SHC性能。未促进的氧化还原催化剂的还原温度按Mg ₆ MnO ₈  <SrMnO ₃  <CaMnO ₃的顺序增加。用20 wt％Na ₂ WO ₄促进产生了能够进行高温SHC的更具选择性的氧化还原催化剂。XPS分析揭示了近表面Mn抑制与SHC选择性之间的相关性。Na ₂ WO ₄ / CaMnO ₃在850个氧化还原循环中显示出稳定的SHC性能（89％H ₂转化率，88％选择性）。与Cr ₂ O ₃ / Al ₂ O ₃乙烷脱氢催化剂串联使用，Na ₂ WO ₄ / CaMnO ₃燃烧了84％的H ₂，同时限制了CO _x产率低于2％。所报道的氧化还原催化剂可以适合于用于从烷烃生产轻质烯烃的环状氧化还原方案中的SHC。©2018美国化学工程师学会AIChE J，64：3141–3150，2018