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Hydro-upgrading of bio-oils derived from pyrolysis of biomass with different H/Ceff ratios in tetralin over Pt/C and Ru/C
Affiliation:1. Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi''an Jiaotong University, Xi''an, Shaanxi, 710049, PR China;2. Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi, 830011, China;3. National Engineering Technology Research Center for Desert-Oasis Ecological Construction, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, Urumqi, 830011, Xinjiang, China;4. University of Chinese Academy of Sciences, Beijing, 100049, China
Abstract:Pyrolysis 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.
Keywords:Biomass pyrolysis  Effective hydrogen  Pyrolysis oil  Upgrading  Upgraded oil
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