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Unraveling the Role of Sodium in Removing Oxygen from Propylene over Fe-Based Catalysts

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A Correction to this article was published on 09 February 2024

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Abstract

Development of effective non-noble metals catalysts in removing oxygen from propylene remains a substantial challenge. Herein, the designed catalyst of 0.5%Na–Fe/Al2O3 exhibited up to 100% O2 conversion and inhibited the greenhouse gas CO2 formation under hydrogen existence. Multiple characterization results confirmed that Na promoter enhances the dispersion of Fe species and the formation of oxygen vacancies, contributing to enriching the reactivity of the O2. Significantly, the TPD results further demonstrated that the Na promoter facilitates the desorption of C3H6, decreasing the reaction probability of O2 and C3H6, which plays an important role in suppressing the formation of CO2. This finding not only provides a novel approach to understand the role of Na promoter, but also opens an avenue for providing scientific guidance to design and synthesis of high-efficiency catalysts.

Graphical Abstract

The effective Na-promoted iron-based catalysts achieved 100% O2 conversion with almost no formation of by-product CO2. Several characterization results confirmed that the presence of Na promoter affected the electronic state of Fe atoms, promoted the formation of oxygen vacancies and improved the O2 reactivity. Significantly, the Na promoter plays an important role in the adsorption of H2 and desorption of C3H6, facilitating to improve the O2 reactivity and inhibit the formation of the by-product CO2.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (21908249).

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Authors and Affiliations

  1. State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao, 266071, Shandong, People’s Republic of China

    Fangxu Lu, Jie Jiang, Jinchong Zhao, Changsheng Zhang, Song Wen, Xiao Sheng, Nan Sheng, Wei Liang, Junjie Feng & Bing Sun

  2. College of Chemical Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Beijing, 100029, People’s Republic of China

    Fangxu Lu & Yue Han

Authors
  1. Fangxu Lu
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Contributions

FL and YH: Conducted the catalysts preparation, activity tests and sample characterizations, writing-original draft, review and editing. JJ: Investigation, data curation. JZ, CZ, and SW: Supervision, data curation. XS, NS, and WL: Activity tests and sample characterizations. JF and BS: Investigation, data curation, and editing.

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Correspondence to Fangxu Lu, Yue Han or Jie Jiang.

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The original version of the article was revised: Dr. Zhang's given name has been corrected.

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Lu, F., Han, Y., Jiang, J. et al. Unraveling the Role of Sodium in Removing Oxygen from Propylene over Fe-Based Catalysts. Catal Lett 154, 1674–1682 (2024). https://doi.org/10.1007/s10562-023-04387-y

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