Oxidative coupling of methane over BaF2-TiO2 catalysts |
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Authors: | Shuiqin Zhou Xiaoping Zhou Huilin Wan K. R. Tsai |
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Affiliation: | (1) Department of Chemistry, Xiamen University, 361005 Xiamen, PR China |
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Abstract: | The addition of F– to Ba-Ti mixed oxide catalysts significantly improves the catalytic performances for the oxidative coupling of methane (MOC), which can achieve high C2 yields at wide feed composition range and high GHSV. The effect is particularly marked for the BaF2– TiO2 catalysts containing more than 50 mol% BaF2. The C2 yield of 17% and the C2 selectivity of > 60% were achieved over these catalysts at 700 ° C. After being on stream for 31 h, the 50 mol% BaF2-TiO2 catalysts showed only a 1–1.5% decrease in the C2 yields. Results obtained by XRD show that various Ba-Ti oxyfluoride phases were formed due to the substitution of F– to O2–. |
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Keywords: | Methane oxidative coupling barium-titanium oxides oxyfluorides |
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