The stabilization effect of Al₂O₃ on unconventional Pb/SiO₂ catalyst for propane dehydrogenation

Abstract

Similar to Sn, Pb located at the same group (IVA) in the periodic table of elements, can also catalyze propane dehydrogenation to propene, while a fast deactivation can be observed. To enhance the stability, the traditional carrier Al₂O₃ with a small amount, was introduced into Pb/SiO₂ catalyst in this study. It has been proved that Al₂O₃ can inhibit the reduction of PbO, and weaken the agglomeration and loss of Pb species due to its enhanced interaction with Pb species. As a result, 3Al15Pb/SiO₂ catalyst exhibits a much higher stability up to more than 150 h. In addition, a simple schematic diagram of the change of surface species on the catalyst surface after Al₂O₃ addition was also proposed.

Graphical abstract

Keywords

Pb/SiO₂ / Al₂O₃ / propane dehydrogenation / propene / stability

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Conflicts of interest

There are no conflicts to declare.

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 22178390), the Natural Science Foundation of Shandong Province of China (Grant No. ZR2022MB023) and the Focus on Research and Development Plan in Shandong Province (Grant No. 2021ZLGX06)

Electronic Supplementary Material

Supplementary material is available in the online version of this article at https://doi.org/10.1007/s11705-023-2315-y and is accessible for authorized users.

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