Fig. 4. Effect of reaction conditions on the catalytic performance of Co/ZrO2 for hydrogenation of EL. (a) 17.4 mmol EL, 15 mL 1,4-dioxane, 190 °C, 4 MPa H2 and 0.1 g Co/ZrO2; (b) 17.4 mmol EL (the 100 mg−2 in the horizontal ordinate represents addition of 3.47 mmol EL), 15 mL 1,4-dioxane, 190 °C, 5 h and 4 MPa H2; (c) 3.47 mmol EL, 15 mL 1,4-dioxane, 190 °C, 6 MPa H2 and 0.1 g Co/ZrO2.
