Chemical looping epoxidation of ethylene was demonstrated, whereby the sole oxidant was a solid oxygen carrier, 15 wt% Ag supported on SrFeO₃. Ethylene reacted with a bed of carrier particles, without any O_2(g) in the feed, to produce ethylene oxide (EO) and CO₂. Following the reduction by the C₂H₄ of the SrFeO₃, it was regenerated by passing air through the bed. The rate of reoxidation was slow, with full regeneration being achieved only by prolonged oxidation at elevated temperatures. A striking synergy between Ag and SrFeO₃ was observed solely when they were in intimate contact, suggesting a basis for a proposed reaction mechanism.

中文翻译：

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化学循环环氧化

证明了乙烯的化学环环氧化，其中唯一的氧化剂是固体氧载体，15wt％的Ag负载在SrFeO _3上。乙烯与进料中没有任何O _2（g）的载体颗粒床反应，生成环氧乙烷（EO）和CO ₂。SrFeO ₃被C ₂ H ₄还原后，使空气通过床层使其再生。再氧化的速度很慢，只有在高温下长时间氧化才能完全再生。仅当Ag和SrFeO ₃紧密接触时，才观察到惊人的协同作用，这为提出的反应机理奠定了基础。