Fig. 2From: Catalytic hydrodeoxygenation of pyrolysis oil over nickel-based catalysts under H2/CO2 atmosphereVolumetric expansion measurements of pyrolysis oil under CO2 atmosphere. Comparison of the oil level: a 8.0 MPa CO2 at 60 °C right after oil charging, b 8.0 MPa CO2 at 60 °C for 72 h, c after gas releaseBack to article page