Hydro-upgrading of bio-oils derived from pyrolysis of biomass with different H/Ceff ratios in tetralin over Pt/C and Ru/C

摘要

? 2022 Hydrogen Energy Publications LLCPyrolysis oils with different effective hydrogen (H/Ceff) ratios are mixed with tetralin at a mass ratio of 1:1 and treated at 400 °C for 2 h under 6 MPa H2 over Pt/C and Ru/C, respectively, to examine the effect of H/Ceff ratio on the yield and quality of the upgraded oil. Pyrolysis oil with higher H/Ceff ratios results in an upgraded oil with higher yield and H/Ceff ratios. The highest S and O reduction ratios of 96.11 and 56.26 are achieved with added Pt/C at an H/Ceff ratio of 1.39 of the feedstock. In comparison, the highest N reduction ratios of 34.50 is achieved with added Ru/C at an H/Ceff ratio of 1.38 of the feedstock. The N and S poison the catalyst's active sites and reduce the deoxygenation efficiency. Thus, we view that the H/Ceff plays a vital role in improving the properties of the bio-oil.