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

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.


Keywords


SrTiO3; CuO-ZnO; OCM; sol-gel

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

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