화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.34, No.8, 2180-2187, August, 2017
DOI10.1007/s11814-017-0126-x  Export Citation
Upgrading of pyrolysis bio-oil using WO3/ZrO2 and Amberlyst catalysts: Evaluation of acid number and viscosity
Yejin Lee, Hoda Shafaghat, Jae-kon Kim1, Jong-Ki Jeon2, Sang-Chul Jung3, In-Gu Lee4, and Young-Kwon Park†
  • School of Environmental Engineering, University of Seoul, Seoul 02504, Korea
  • 1Research Institute of Petroleum Technology, Korea Petroleum Quality & Distribution Authority, Cheongju 28115, Korea
  • 2Department of Chemical Engineering, Kongju National University, Cheonan 31080, Korea
  • 3Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, Daejeon 34129, Korea
  • 4Department of Environmental Engineering, Sunchon National University, Suncheon 57922, Korea
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Tungstated zirconia (WO3/ZrO2 with WO3 loadings of 9.9 (WZ9.9), 15.5 (WZ15.5), and 15.7wt% (WZ15.7)) and Amberlyst (15, 35, 36, 39 and 45) catalysts were employed to upgrade pyrolysis bio-oil of acacia sawdust through an esterification reaction using methanol at atmospheric pressure and room temperature or 80°C. The upgrading efficiency was evaluated by measuring the total acid number (TAN) and viscosity. The viscosity and TAN of the resulting upgraded bio-oil were found to be dependent on the calcination temperature of the WO3/ZrO2 catalysts. At room temperature, the largest decrease in viscosity and TAN of the bio-oil and methanol mixture was obtained using WZ9.9 tungstated zirconia calcined at 900 °C. An increase in reaction temperature to 80 °C improved the flowability and TAN of the methanol-added bio-oil using WZ9.9 activated at 900 °C. The product distribution of the bio-oil upgraded using methanol revealed esterification to be the dominant reaction pathway under the reaction conditions of this study. When the ether extracted bio-oil was upgraded at 80 °C using methanol over catalysts, the Amberlyst catalysts were found more effective than tungstated zirconia catalysts in enhancing the esterification reaction and reducing TAN.
Keywords:Bio-oil;Upgrading;Esterification;Viscosity;Total Acid Number (TAN)
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