Fig. 7. Production of GVL as a function of reaction time during hydrogenation of LA over Cu/TiO2, Re/TiO2 and Cu–Re(1 : 1)/TiO2 catalysts. Reaction conditions: 0.5 g LA, 50 mg catalyst, 10 mL 1,4-dioxane, 4.0 MPa H2, and 1000 rpm.
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