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Synergistic Effect of Zinc and Iron in the CO2-Assisted Oxidative Dehydrogenation of Propane
ACS Catalysis ( IF 11.3 ) Pub Date : 2023-11-02 , DOI: 10.1021/acscatal.3c04371
Xinbao Zhang 1 , Junjie Li 1 , Wen Liu 1 , Yingbin Zheng 1 , Jie An 1 , Wenjie Xin 1 , Zhenni Liu 1 , Longya Xu 1 , Xiujie Li 1 , Xiangxue Zhu 1
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The CO2-assisted oxidative dehydrogenation (CO2-ODH) of C3H8 provides a promising process for producing C3H6 and utilizing CO2. In this study, the combination of zinc and iron demonstrated a synergistic effect, leading to improved catalytic activity and stability. The importance of the reducibility of ZnFe2Ox/S-1 has been highlighted through auxiliary experiments and comprehensive characterizations. The presence of sodium additives is found to hinder the reduction of ZnFe2Ox/S-1 by inducing strong interactions. Furthermore, during the initial stage of the reaction, the reduction process initiates the catalytic activity and promotes CO2 conversion through decarbonization reactions. The precursor of ZnFe2O4 and the strong interaction between Zn and Fe species, along with the formation process of α-Fe from inside to outside, effectively prevent the occurrence of the reforming reaction and suppress the coking deactivation of ZnFe2Ox/S-1. This study provides fundamental insights into Zn- and Fe-based catalysts in the CO2-assisted oxidative dehydrogenation reaction.

中文翻译:

锌和铁在 CO2 辅助丙烷氧化脱氢中的协同作用

CO 2辅助的C 3 H 8氧化脱氢(CO 2 -ODH)提供了一种有前途的生产C 3 H 6和利用CO 2的方法。在这项研究中,锌和铁的组合表现出协同效应,从而提高了催化活性和稳定性。通过辅助实验和综合表征强调了ZnFe 2 O x /S-1还原性的重要性。研究发现钠添加剂的存在会通过诱导强相互作用来阻碍 ZnFe 2 O x /S-1的还原。此外,在反应的初始阶段,还原过程启动催化活性并通过脱碳反应促进CO 2转化。ZnFe 2 O 4的前驱体以及Zn和Fe物种之间的强相互作用,以及由内到外的α-Fe的形成过程,有效阻止了重整反应的发生,抑制了ZnFe 2 O x /的结。 S-1。这项研究为 CO 2辅助氧化脱氢反应中的锌基和铁基催化剂提供了基础见解。
更新日期:2023-11-02
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