Results of the International Energy Agency Round Robin on fast pyrolysis bio-oil production

Elliott, Douglas C., Meier, Dietrich, Oasmaa, Anja, van de Beld, Bert, Bridgwater, Anthony V. and Marklund, Magnus (2017). Results of the International Energy Agency Round Robin on fast pyrolysis bio-oil production. Energy and Fuels, 31 (5), pp. 5111-5119.


An international round robin study of the production of fast pyrolysis bio-oil was undertaken. A total of 15 institutions in six countries contributed. Three biomass samples were distributed to the laboratories for processing in fast pyrolysis reactors. Samples of the bio-oil produced were transported to a central analytical laboratory for analysis. The round robin was focused on validating the pyrolysis community understanding of production of fast pyrolysis bio-oil by providing a common feedstock for bio-oil preparation. The round robin included: distribution of three feedstock samples, hybrid poplar, wheat straw, and a blend of lignocellulosic biomasses, from a common source to each participating laboratory, preparation of fast pyrolysis bio-oil in each laboratory with the three feedstocks provided, and return of the three bio-oil products (minimum of 500 mL) with operational description to a central analytical laboratory for bio-oil property determination. The analyses of interest were CHN, S, trace element analysis, water, ash, solids, pyrolytic lignin, density, viscosity, carboxylic acid number, and accelerated aging of bio-oil. In addition, an effort was made to compare the bio-oil components to the products of analytical pyrolysis through gas chromatography/mass spectrometry (GC/MS) analysis. The results showed that clear differences can occur in fast pyrolysis bio-oil properties by applying different process configurations and reactor designs in small scale. The comparison to the analytical pyrolysis method suggested that pyrolysis (Py)-GC/MS could serve as a rapid qualitative screening method for bio-oil composition when produced in small-scale fluid-bed reactors. Gel permeation chromatography was also applied to determine molecular weight information. Furthermore, hot vapor filtration generally resulted in the most favorable bio-oil product, with respect to water, solids, viscosity, and carboxylic acid number. These results can be helpful in understanding the variation in bio-oil production methods and their effects on bio-oil product composition.

Publication DOI:
Divisions: Engineering & Applied Sciences > Chemical Engineering & Applied Chemistry
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Additional Information: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Energy Fuels, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Uncontrolled Keywords: Chemical Engineering(all),Fuel Technology,Energy Engineering and Power Technology
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2017-05-18
Authors: Elliott, Douglas C.
Meier, Dietrich
Oasmaa, Anja
van de Beld, Bert
Bridgwater, Anthony V. ( 0000-0001-7362-6205)
Marklund, Magnus



Version: Accepted Version

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