Upgrading of fast pyrolysis oil via catalytic hydrodeoxygenation: Effects of type of solvents

Van Krevelan plot of feeds (UO1 ∼ UO9) and HDO oil fractions (OF-UO1 ∼ OF-UO9) from all HDO tests using hydro-treated bio-oil (UO2 ∼ UO6) and ethanol (UO7 ∼ UO8) as solvents, respectively. UO1 and UO9 represent HDO tests without solvent at 300 °C and 350 °C, respectively.208