Chemical looping oxidative dehydrogenation (CL-ODH) of ethane provides a potential method to convert ethane into ethylene by using a circulative redox catalyst (also called oxygen carrier). In this work, perovskites type oxide LaMnO₃ and three kinds of alkali-metal (Na, Na₃PO₄ and Na₂WO₄) promoted LaMnO₃ redox catalysts were prepared and tested for CL-ODH of ethane. Results showed that the alkali promoters not only reduce the Mn oxidation state, but also decrease the surface manganese sites. The alkali-doping induces the formation of electron-rich intermediate oxygen species, which contributes to the higher ethylene selectivity of the alkali-modified LaMnO₃. As the best candidate for CL-ODH of ethane among the four catalysts, NaW-LaMnO₃ exhibited a stable activity during 25 redox cycles. 85 % of ethylene selectivity and 60 % of ethylene yield was obtained, which is significantly improved in comparison to 41.16 % ethylene yield of unpromoted LaMnO₃, simultaneously exhibiting less than 1 % of coke formation.

乙烷的化学环氧化脱氢（CL-ODH）提供了一种使用循环氧化还原催化剂（也称为氧气载体）将乙烷转化为乙烯的潜在方法。在这项工作中，制备了钙钛矿型氧化物LaMnO ₃和三种碱金属（Na，Na ₃ PO ₄和Na ₂ WO ₄）促进的LaMnO ₃氧化还原催化剂，并测试了乙烷的CL-ODH。结果表明，碱促进剂不仅降低了锰的氧化态，而且降低了锰的表面位置。碱掺杂诱导了富电子中间氧物种的形成，这有助于碱改性LaMnO ₃的更高的乙烯选择性。。作为四种催化剂中乙烷CL-ODH的最佳候选，NaW-LaMnO ₃在25个氧化还原循环中表现出稳定的活性。获得了85％的乙烯选择性和60％的乙烯收率，与未促进的LaMnO _3的41.16％的乙烯收率相比有显着提高，同时形成的焦炭少于1％。