Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (9): 1754.

• Articles • Previous Articles     Next Articles

Upgrading of Bio-oil via Esterification Catalysted with Acidic Ion-exchange Resin

XIONG Wan-Ming, FU Yao*, LAI Da-Ming, GUO Qing-Xiang*   

  1. Key Laboratory of Biomass Clean Energy of Anhui Province, University of Science and Technology of China, Hefei 230026, China
  • Received:2009-01-12 Online:2009-09-10 Published:2009-09-10
  • Contact: FU Yao. E-mail: fuyao@ustc.edu.cn; GUO Qing-Xiang. E-mail: qxguo@ustc.edu.cn
  • Supported by:

    国家“九七三”计划项目(批准号: 2007CB210205)和安徽省优秀青年科技基金(批准号: 08040106829)资助.

Abstract:

The corrosiveness of bio-oils is derived from organic acids, and it has limited the applications of bio-oil for current vehicles. But these acids can react with alcohol and convert into esters under mild condition with proper catalysts. The super-acid ion-exchange resin was applied to upgrade bio-oil and its light distillation fraction. The esterifiaction of bio-oils were preformed at 60 ℃ for 4 h, and the conversion of acetic acid approached 88%. Furthermore, the properties of bio-oils after esterification were improved significantly: the higher heating value approached 20.08 and 18.33 MJ/kg, which improved 19.5% and 43.6%, respectively. The viscosity was decreased from 11.8 and 1.42 mm2/s to 3.77 and 1.12 mm2/s, respectively; and the moisture is about 23.7% and 28.4%(mass fraction). The results of GC-MS show that organic acids in both bio-oils were successfully transformed into esters, primary ethyl acetate. Furthermore, the ion-exchanged resin could be convenient separated and reused, and would be a promising catalyst for upgrading of bio-oil.

Key words: Bio-oil; Solid acid; Ion-exchanged resin; Esterification

TrendMD: