Evaporation of pyrolysis oil: Product distribution and residue char analysis

Authors

  • Guus van Rossum,

    Corresponding author
    1. Thermo-Chemical Conversion of Biomass, Faculty of Science and Technology, University of Twente, Research Institute IMPACT, Enschede 7500 AE, The Netherlands
    • Thermo-Chemical Conversion of Biomass, Faculty of Science and Technology, University of Twente, Research Institute IMPACT, Enschede 7500 AE, The Netherlands
    Search for more papers by this author
  • Berta Matas Güell,

    1. Catalytic Processes and Materials, Faculty of Science and Technology, University of Twente, Research Institute IMPACT, Enschede 7500 AE, The Netherlands
    Search for more papers by this author
  • Ragavendra P. Balegedde Ramachandran,

    1. Thermo-Chemical Conversion of Biomass, Faculty of Science and Technology, University of Twente, Research Institute IMPACT, Enschede 7500 AE, The Netherlands
    Search for more papers by this author
  • K. Seshan,

    1. Catalytic Processes and Materials, Faculty of Science and Technology, University of Twente, Research Institute IMPACT, Enschede 7500 AE, The Netherlands
    Search for more papers by this author
  • Leon Lefferts,

    1. Catalytic Processes and Materials, Faculty of Science and Technology, University of Twente, Research Institute IMPACT, Enschede 7500 AE, The Netherlands
    Search for more papers by this author
  • Wim P. M. Van Swaaij,

    1. Thermo-Chemical Conversion of Biomass, Faculty of Science and Technology, University of Twente, Research Institute IMPACT, Enschede 7500 AE, The Netherlands
    Search for more papers by this author
  • Sascha R. A. Kersten

    1. Thermo-Chemical Conversion of Biomass, Faculty of Science and Technology, University of Twente, Research Institute IMPACT, Enschede 7500 AE, The Netherlands
    Search for more papers by this author

Abstract

The evaporation of pyrolysis oil was studied at varying heating rates (∼1–106°C/min) with surrounding temperatures up to 850°C. A total product distribution (gas, vapor, and char) was measured using two atomizers with different droplet sizes. It was shown that with very high heating rates (∼106°C/min) the amount of char was significantly lowered (∼8%, carbon basis) compared to the maximum amount, which was produced at low heating rates using a TGA (∼30%, carbon basis; heating rate 1°C/min). The char formation takes place in the 100–350°C liquid temperature range due to polymerization reactions of compounds in the pyrolysis oil. All pyrolysis oil fractions (whole oil, pyrolytic lignin, glucose and aqueous rich/lean phase) showed charring behavior. The pyrolysis oil chars age when subjected to elevated temperatures (≥700°C), show similar reactivity toward combustion and steam gasification compared with chars produced during fast pyrolysis of solid biomass. However, the structure is totally different where the pyrolysis oil char is very light and fluffy. To use the produced char in conversion processes (energy or syngas production), it will have to be anchored to a carrier. © 2010 American Institute of Chemical Engineers AIChE J, 2010

Ancillary