A comparative study on the catalytic activities of the SrTiO3 perovskite and oxide CuO-ZnO mixed oxides for the oxidative coupling of methane

Hung Nguyen Thanh; Phuong Pham Thi Mai; To Dang Thi; Thang Le Minh

doi:10.51316/jca.2022.060

Authors

Hung Nguyen Thanh School of Chemical Engineering, Hanoi University of Science and Technology, Vietnam
Phuong Pham Thi Mai Advanced Institute of Science and Technology, Hanoi University of Science and Technology, Hanoi, Vietnam
To Dang Thi School of Chemical Engineering, Hanoi University of Science and Technology, Vietnam
Thang Le Minh School of Chemical Engineering, Hanoi University of Science and Technology, Vietnam

DOI:

https://doi.org/10.51316/jca.2022.060

Keywords:

SrTiO3, CuO-ZnO, OCM, sol-gel

Abstract

In this study, SrTiO₃ catalyst was prepared by sol-gel method and CuO-ZnO by co-precipitation for oxidative coupling of methane (OCM). The results showed that the conversion rate in the SrTiO₃ sample was high (about 35%) at 850 ^oC, and the product C₂H₄ with an yield of 0.12%. Several modern analytical methods such as XRD, BET, TPx, SEM have been characterized. The XRD results showed a stable phase structure and high crystallinity with both samples. NH₃-TPD recorded weak acid centers on SrTiO₃, leading to coke formation on the impact surface. H₂-TPR and O₂-TPD express the redox of CuO-ZnO, resulting in a deep oxidation product of CO₂. Factors affecting the ratio of C₂H₆ and C₂H₄ were also considered.

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