Investigation of perovskite catalysts BaTiO3 and SrTiO3 for the oxidative coupling of methane

Phuong Pham Thi Mai; Hung Nguyen Thanh; GS. Lê Minh Thắng - ĐH Bách Khoa Hà Nội

doi:10.62239/jca.2024.011

Authors

Phuong Pham Thi Mai International Training Institute for Materials Science, Hanoi University of Science and Technology, Viet Nam Author
Hung Nguyen Thanh School of Chemistry and Life Sciences, Hanoi University of Science and Technology Author
Thang Le Minh School of Chemistry and Life Sciences, Hanoi University of Science and Technology Author

DOI:

https://doi.org/10.62239/jca.2024.011

Keywords:

BaTiO3, SrTiO3, OCM, sol-gel

Abstract

In this study, perovskite BaTiO₃ and SrTiO₃ catalysts were prepared using the sol-gel method for oxidative coupling of methane (OCM). Characterization of catalysts was investigated by X-ray diffraction for crystal properties, physical N₂ adsorption to determine specific surface area, and temperature-programmed techniques to examine the redox properties and acid–base strength. The results showed that at any reaction temperature, the methane conversion of BaTiO₃ was consistently higher than that of SrTiO₃. This may caused by BaTiO₃’s better reducibility detected by H₂-TPR experiments. Moreover, the selectivity of BaTiO₃ (25 – 30%) was much greater than that of SrTiO₃. Perhaps the abundant lattice oxygen may explain the excellent C₂H₄ selectivity obtained for BaTiO₃.

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