III International Conference

PP-II-160DEVELOPMENT OF NON-SULFIDAZED CATALYST OTHYDRODEOXYGENATION OF BIO-OILKhromova S.A., Lebedev M.Yu., Sabirova Z. A., Yakovlev V.A., Kirillov V.A.,Parmon V.N.Boreskov Institute of Catalysis SB RAS, Novosibirsk, RussiaE-mail: khromova@catalysis.ruBiomass is a renewable alternative to fossil raw materials in the production of liquid fuelsand chemicals. The European Union has set a challenge of 20 % substitution for conventionalfuels in the motor vehicles by 2020. Therefore, efforts in research and development forbiomass utilization have increased. The focus on the improving the properties of biomassderivedliquid fuels, wich are produced by flash pyrolysis and high pressure liquefaction. Theoxygen content in wood-derived crude bio-oil can be as high as 45 wt% due to mainlyaliphatic and aromatic alcohols, ethers, ketones, carboxylic acids and water. Theseoxygenated compounds are responsible for some deleterious properties of bio-oil: highviscosity, non-volatility, poor calorific value, corrosiveness, immiscibility with fossil fuels,thermal instability and trend to polymerization on storage and transportation. Hence, the biooilneeds upgrading to reduce the oxygen content.Hydrodeoxygenation (HDO) allows oxygen-free compounds to be synthesized at the H 2pressure of 1-150 atm and 200-350 о С. Sulfided hydrotreating catalysts such as CoMo/Al 2 O 3and NiMo/Al 2 O 3 are commonly used for HDO. The catalyst properties such as stability andselectivity are crucial, as the interaction of oxygen-containing compounds with the catalystscan modify the sulphide structure of the catalysts. Note that alumina is an inappropriatesupport for the bio-fuel HDO catalysts because of their cracking and coking. Most HDOstudies reported in the literature were carried out with model compounds and mixtures ofmodel compounds rather than real bio-oil. Most attention in the field was paid to phenols andfurans because of their low reactivity in HDO. In general, in the presence of sulfided CoMoorNiMo-catalysts HDO of an oxygen-containing compounds proceeds at a lower rate than thehydridesufidizing (HDS) of a sulfur-containing compound of a similar structure. The mainreason for these phenomena is reduction of sulfided Co- or Ni-containing active center to themetal state followed by coke formation and the catalyst deactivation. When so, sulfur isremoved from the catalysts and the target fuels are contaminated by sulfur.460