Effects of acetone and ethyl acetate additives on the storage stability of bio-oil

Different ratios (3%, 6%, 9%, 12%, 15%) of acetone and ethyl acetate were added into crude bio-oil from fast pyrolysis to invest the effects of these two additives on the storage stability of bio-oil.The results show that both acetone and ethyl acetate can reduce the water content of bio-oil, and the ethyl acetate performes better than acetone.Compared to the blank control group, the water content decreases by 17.8%(from 16.32% to 13.41%) at 15% dose of ethyl acetate.The viscosities of bio-oil decrease a lot after adding acetone and ethyl acetate, and acetone shows more obvious effect.With the increasing of additive dose, the viscosity of bio-oil decreases.The viscosity of bio-oil decreases more than that of the control group by 37.20%, 57.78%, 71.92%, 79.79%, 84.67% with 3%, 6%, 9%, 12%, 15% dose of acetone, respectively.There is no significant difference in pH values among acetone and ethyl acetate addition groups and control group.According to the FT-IR and GC-MS analysis, it indicates that acetone and ethyl acetate inhibit the aging reactions of bio-oil during storage.