Abstract
2-methylfuran (2-MF) is a high-performance gasoline additive due to its high-octane value and good explosion resistance. In this study, cerium tin oxide solid solutions were prepared by a co-precipitation method. The selectivity of 2-MF and the conversion of furfural significantly improved after doping CeO2 with SnO2. 95 % yield of 2-MF was obtained on 5 %Ru/Ce0.975Sn0.025O2, compared to only 40 % yield on 5 %Ru/CeO2. The reaction rate of furfural over 5 %Ru/Ce0.975Sn0.025O2 was 4.9 times higher than that with 5 %Ru/CeO2. Characterizations show an increased concentration of SnO2 around Ru, and the ratio of Ruδ+/Ru reaches a maximum on 5 %Ru/Ce0.975Sn0.025O2. The binding energy shift of Ru0, Sn0, O, and Ce3+ indicates that the introduction of Sn plays an important role in regulating the interface between Ru and CeO2. The increase of Ruδ+/Ru ratio benefits the hydrodeoxygenation of furfural and contributes to the high yield of 2-MF. This study provides a highly active catalyst for the hydrodeoxygenation of furfural.
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