Ru/C catalyst modified with MoOx (Ru-MoOx/C) showed high activity for hydrogenation of lactic acid to propylene glycol . The TOF for lactic acid hydrogenation over the best Ru-MoOx/C (Mo/Ru = 1/16) was 114 h-1, which was about 4 times higher than that over Ru/C. The highest propylene glycol yield of 95% was obtained over Ru-MoOx/C (Mo/Ru = 1/16) in 12 h at 393 K. Based on the results of XRD, TEM, CO adsorption and FT-IR analyses of Ru-MoOx catalyst, Ru is in metallic state and MoOx species partially covered the surface of Ru metal particle. MoOx modification on Ru catalyst produces the reactive hydride species from H2 on the Ru metal nearby MoOx species, resulting in increase of the activity for hydrogenation of lactic acid. 

Hydrogenation of lactic acid to propylene glycol over Mo modified Ru/C catalyst

248th National Meeting (2014)

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