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Antioxidant properties of pyroligneous acid obtained by thermochemical conversion of Schisandra chinensis extract Baill.

Date:2016/8/31 17:05:52

Antioxidant properties of pyroligneous acid obtained by thermochemical conversion of Schisandra chinensis extract 

Baill.Sustainable development of renewable resources is a major challenge globally. Biomass is an important renewable 

energy source and an alternative to fossil fuels. Pyrolysis of biomass is a promising method for simultaneous 

production of biochar, bio-oil, pyroligneous acid (PA), and gaseous fuels. The purpose of this study was to 

investigate the pyrolysis process and products yields of Schisandra chinensis extract fruits with different 

pyrolysis powers. The obtained PA was extracted with organic solvents, including ethyl formate, dichloromethane,

methanol and tetrahydrofuran. The antioxidant activities, including the free radical scavenging activity and 

ferric reducing power, of the PA extracts were investigated. The synthetic antioxidants butylated hydroxyanisole 

and butylated hydroxytoluene were used as positive controls. A dichloromethane extract of PA showed excellent 

antioxidant properties compared to the other extracts. The chemical compositions of the PA extracts were 

determined by GC-MS, and further proved that the dichloromethaneSchisandra chinensis extract had the best 

antioxidant characteristics among the extracts tested.