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Upgrading of pyrolysis bio-oil using WO3/ZrO2 and Amberlyst catalysts: Evaluation of acid number and viscosity

  • Catalysis, Reaction Engineering
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Abstract

Tungstated zirconia (WO3/ZrO2 with WO3 loadings of 9.9 (WZ9.9), 15.5 (WZ15.5), and 15.7 wt% (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.

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Authors and Affiliations

  1. School of Environmental Engineering, University of Seoul, Seoul, 02504, Korea

    Yejin Lee, Hoda Shafaghat & Young-Kwon Park

  2. Research Institute of Petroleum Technology, Korea Petroleum Quality & Distribution Authority, Cheongju, 28115, Korea

    Jae-kon Kim

  3. Department of Chemical Engineering, Kongju National University, Cheonan, 31080, Korea

    Jong-Ki Jeon

  4. Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, Daejeon, 34129, Korea

    Sang-Chul Jung

  5. Department of Environmental Engineering, Sunchon National University, Suncheon, 57922, Korea

    In-Gu Lee

Authors
  1. Yejin Lee
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  2. Hoda Shafaghat
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  3. Jae-kon Kim
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  4. Jong-Ki Jeon
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  5. Sang-Chul Jung
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  6. In-Gu Lee
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  7. Young-Kwon Park
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Correspondence to Young-Kwon Park.

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Lee, Y., Shafaghat, H., Kim, Jk. et al. Upgrading of pyrolysis bio-oil using WO3/ZrO2 and Amberlyst catalysts: Evaluation of acid number and viscosity. Korean J. Chem. Eng. 34, 2180–2187 (2017). https://doi.org/10.1007/s11814-017-0126-x

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  • DOI: https://doi.org/10.1007/s11814-017-0126-x

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