CO₂ assisted ethane dehydrogenation provides a promising route for the utilization of shale gas and greenhouse gas. This study investigates the role and evolution of active oxygen species over Fe-doped ZrO₂ catalysts in distinct dehydrogenation reactions via Mars-van Krevelen mechanism. Fe doping led to an increase in active oxygen species (from 12.9% to 23.4%) benefitted from the phase transformation of ZrO₂. This enhancement significantly boosted ethane dehydrogenation activity from 5.0 to 16.1 mmol_Ethene/g_Cat/h. In the absence of CO₂, the ethane conversions rapidly decreased with a deactivation rate constant (k_d) of 0.930 h⁻¹ due to the irreversible oxygen species loss and coke deposition. Although the catalytic stability of the optimal catalyst was greatly improved (k_d = 0.006 h⁻¹) after CO₂ introduction, a decrease in ethane conversion occurred when CO₂ could not supplement oxygen species due to the formation of coke layers. A simple O₂ oxidation can effectively restore stable activity during 5 reaction-regeneration cycles for 3600 mins.

CO ₂辅助乙烷脱氢为页岩气和温室气体的利用提供了一条有前景的途径。本研究通过 Mars-van Krevelen 机制研究了 Fe 掺杂 ZrO ₂催化剂上活性氧在不同脱氢反应中的作用和演化。_{Fe掺杂导致活性氧的增加（从12.9%增加到23.4%），这得益于ZrO 2}的相变。这种增强显着地将乙烷脱氢活性从 5.0 mmol_乙烯/g Cat /h 提高到 16.1 mmol 乙烯 /g _Cat /h。_{在没有CO 2}的情况下，乙烷转化率迅速下降，失活速率常数(k _d )为0.930 h ^-1由于不可逆的氧物质损失和焦炭沉积。_{尽管引入CO 2}后优化催化剂的催化稳定性大大提高(k _d  = 0.006 h ^-1 ) ，但当CO ₂由于焦炭层的形成而无法补充氧物种时，乙烷转化率出现下降。简单的O ₂氧化可以在3600分钟的5个反应再生循环中有效地恢复稳定的活性。