Low-temperature oxidative coupling of methane using alkaline earth metal oxide-supported perovskites

Seoyeon Lim; Jae Wook Choi; Dong Jin Suh; Ung Lee; Kwang Ho Song; Jeong Myeong Ha

doi:10.1016/j.cattod.2019.11.014

Low-temperature oxidative coupling of methane using alkaline earth metal oxide-supported perovskites

Seoyeon Lim, Jae Wook Choi, Dong Jin Suh, Ung Lee, Kwang Ho Song, Jeong Myeong Ha

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article

Abstract

Perovskite-supported alkaline-earth metal oxide catalysts were prepared for application in the oxidative coupling of methane (OCM). The selective production of C₂₊ compounds, including ethane, ethylene, acetylene, propane, and propylene, was observed at reaction temperatures < 700 °C. This lower reaction temperature was not achieved with pure perovskites but only with the combination of alkaline-earth metal oxides and perovskite supports. The formation of complex mixed oxides, such as Ba-Ca-Ti-O_x, Ba-Sr-Ti-O_x, and Ba₂TiO₄, was also observed for these catalysts. This contributed to the improved C₂₊ yield at the lower reaction temperature. The strong basicity, which contributes to the improved OCM activity, was also observed for these catalysts.

Original language	English
Journal	Catalysis Today
DOIs	https://doi.org/10.1016/j.cattod.2019.11.014
Publication status	Accepted/In press - 2020 Jan 1

Keywords

Alkaline-earth metal oxide
Barium oxide
Low temperature
Methane
Oxidative coupling
Perovskite

ASJC Scopus subject areas

Catalysis
Chemistry(all)

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Lim, S., Choi, J. W., Jin Suh, D., Lee, U., Song, K. H., & Ha, J. M. (Accepted/In press). Low-temperature oxidative coupling of methane using alkaline earth metal oxide-supported perovskites. Catalysis Today. https://doi.org/10.1016/j.cattod.2019.11.014

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abstract = "Perovskite-supported alkaline-earth metal oxide catalysts were prepared for application in the oxidative coupling of methane (OCM). The selective production of C2+ compounds, including ethane, ethylene, acetylene, propane, and propylene, was observed at reaction temperatures < 700 °C. This lower reaction temperature was not achieved with pure perovskites but only with the combination of alkaline-earth metal oxides and perovskite supports. The formation of complex mixed oxides, such as Ba-Ca-Ti-Ox, Ba-Sr-Ti-Ox, and Ba2TiO4, was also observed for these catalysts. This contributed to the improved C2+ yield at the lower reaction temperature. The strong basicity, which contributes to the improved OCM activity, was also observed for these catalysts.",

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AU - Ha, Jeong Myeong

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N2 - Perovskite-supported alkaline-earth metal oxide catalysts were prepared for application in the oxidative coupling of methane (OCM). The selective production of C2+ compounds, including ethane, ethylene, acetylene, propane, and propylene, was observed at reaction temperatures < 700 °C. This lower reaction temperature was not achieved with pure perovskites but only with the combination of alkaline-earth metal oxides and perovskite supports. The formation of complex mixed oxides, such as Ba-Ca-Ti-Ox, Ba-Sr-Ti-Ox, and Ba2TiO4, was also observed for these catalysts. This contributed to the improved C2+ yield at the lower reaction temperature. The strong basicity, which contributes to the improved OCM activity, was also observed for these catalysts.

AB - Perovskite-supported alkaline-earth metal oxide catalysts were prepared for application in the oxidative coupling of methane (OCM). The selective production of C2+ compounds, including ethane, ethylene, acetylene, propane, and propylene, was observed at reaction temperatures < 700 °C. This lower reaction temperature was not achieved with pure perovskites but only with the combination of alkaline-earth metal oxides and perovskite supports. The formation of complex mixed oxides, such as Ba-Ca-Ti-Ox, Ba-Sr-Ti-Ox, and Ba2TiO4, was also observed for these catalysts. This contributed to the improved C2+ yield at the lower reaction temperature. The strong basicity, which contributes to the improved OCM activity, was also observed for these catalysts.

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KW - Methane

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