Pd/C modified with Sn catalyst for liquid-phase selective hydrogenation of maleic anhydride to gamma-butyrolactone |
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| Authors: | Rongrong Li Jia Zhao Deman Han Xiaonian Li |
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| Institution: | a Industrial Catalysis Institute of Zhejiang University of Technology, Hangzhou 310014, China;
b School of Pharmaceutical and Chemical Engineering, Tai Zhou University, Taizhou 317000, China |
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| Abstract: | Pd catalysts suffered from poor selectivity and stability for liquid-phase hydrogenation of maleic anhydride (MA) to gamma-butyrolactone (GBL). Thus, Pd/C catalysts modified with different Sn loadings were synthesized, and characterized by XRD, XPS, TEM and elemental mapping. The types of alloy phase and the amounts of the surface Pd-SnOx sites altered along with Sn/Pd mass ratios from 0-1.0 synthesized in the process of preparation. The maximum reaction rate was 0.57 mol-GBL/(mol-Pd min) and selectivity was 95.94% when the Sn/Pd mass ratio was 0.6. It might be attributed to the formation of Pd2Sn alloy and less amounts of Pd-SnOx sites. |
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| Keywords: | Bimetallic catalysts Sn/Pd mass ratio Maleic anhydride Selective hydrogenation Gamma-butyrolactone |
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