화학공학소재연구정보센터
Biomass & Bioenergy, Vol.32, No.11, 1056-1061, 2008
Bio-oil upgrading by means of ethyl ester production in reactive distillation to remove water and to improve storage and fuel characteristics
Several solid acids (SO42-/MxOy) were prepared and compared in upgrading bio-oil using ethanol and bio-oil as raw materials through reactive rectification. Two kinds of upgraded bio-oil were obtained in the upgrading process. The densities of two kinds of upgraded bio-oil were reduced from 1.16 to 0.91 and 0.95 g cm(-3), and the gross calorific value increased from 14.3 to 21.5 and 24.5 MJ kg(-1) and the acidity of upgraded bio-oil was also alleviated from 2.82 to 7.06 and 5.35, respectively. The results of H-1 NMR, gas chromatography-mass spectrometry (GC-MS) and FT-IR analysis showed that the ester reaction in the bio-oil was promoted by solid acid catalysts. The stability of upgraded bio-oil was investigated by storing at room temperature. After 3 months of aging, the upgraded bio-oil did not show much viscosity increase. Published by Elsevier Ltd.