The properties of bio-oils depend on factors, such as biomass feedstocks, production processes, reaction conditions and collecting efficiency. Usually the bio-oils of oil plants have a higher heating value compared with those of straw, wood or agricultural residues. Beis et al. [13] conducted pyrolysis experiments on a sample of safflower seed and obtained bio-oil with a heating value of 41.0 MJ/kg and a maximum yield of 44%. Ozcimen and Karaosmanoglu [14] produced bio-oil from rapeseed cake in a fixed bed with a heating value of 36.4 MJ/kg and a yield of 59.7%. However, taking wood and agricultural residues as raw materials, the bio-oils have a heating value of about 20 MJ/kg and a yield up to 70–80%.