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bce ›› 2014, Vol. 48 ›› Issue (1): 13-17.doi: 10.3969/j.issn.1673-5854.2014.01.003

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Upgrading Bio-oil by Underpressure Reaction Rectification over Catalysts Supported by ZrO2-Al2O3

CHENG Yi, DENG Xu-sheng, LIU Liu-jun, LI Rui   

  1. Department of Forest Chemical Processing Engineering, Beijing Forestry University, Beijing 100083, China
  • Received:2013-08-10 Online:2014-01-30 Published:2014-02-11

Abstract: The ZrO2-Al2O3 was used as a carrier for preparing the catalysts SO42-/ZrO2-Al2O3, NaOH/ZrO2-Al2O3 and ZrO2-Al2O3 in the process of upgrading bio-oil by the methods of dehydration after esterification and reaction recification. Compared these two methods, we could conclude that dehyrating after esterification over 3A molecular sieve could decrease the moisture content to 19.6%, 18.3% and 15.6%, while reaction recification were 4.8%, 5.4% and 3.8% which were better than before under the condition of SO42-/ZrO2-Al2O3, NaOH/ZrO2-Al2O3, ZrO2-Al2O3 catalyzed, respectively. Meanwhile, according to the evaluation of the bio-oil catalyzed by the modified ZrO2-Al2O3 with the formula of esterification degree, it indicated the activation of catalysts are SO42-/ZrO2-Al2O3>NaOH/ZrO2-Al2O3>ZrO2-Al2O3. Moreover, the quality of the upgraded oil (kinematics viscosity, pH value, density and heating value) showed that the bio-oil upgraded by reaction rectification and catalyzed by sulphated metal oxide could produce a out-looking fuel.

Key words: Bio-oil, catalytic esterification, esterification degree, reaction rectification

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