University of Oulu

Tharaka Rama Krishna C. Doddapaneni, Rohan Jain, Ramasamy Praveenkumar, Jukka Rintala, Henrik Romar, Jukka Konttinen, Adsorption of furfural from torrefaction condensate using torrefied biomass, In Chemical Engineering Journal, Volume 334, 2018, Pages 558-568, ISSN 1385-8947, https://doi.org/10.1016/j.cej.2017.10.053. (http://www.sciencedirect.com/science/article/pii/S138589471731762X) Keywords: Detoxification; Anaerobic digestion; Pellets; Torrefaction volatiles; Energy densification

Adsorption of furfural from torrefaction condensate using torrefied biomass

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Author: Doddapaneni, Tharaka Rama Krishna C.1; Jain, Rohan1,2; Praveenkumar, Ramasamy1;
Organizations: 1Laboratory of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FI-33101 Tampere, Finland
2Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Bautzner Landstrasse 400, 01328 Dresden, Germany
3University of Oulu, Research Unit of Sustainable Chemistry, P.O. Box 3000, FI-90014 Oulu, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2017112250832
Language: English
Published: Elsevier, 2018
Publish Date: 2019-10-12
Description:

Abstract

Torrefaction is a biomass energy densification process that generates a major byproduct in the form of torrefaction condensate. Microbial conversion of torrefaction condensate could be an attractive option for energy integration within torrefaction process. However, torrefaction condensate contains several compounds, such as furfural, 5-hydroxymethylfurfural and guaiacol that are inhibitory to microbes. In this study, for the first time, we reported detoxification of torrefaction condensate, by removing the major inhibitory compound furfural, using torrefied biomass and later used the detoxified torrefaction condensate for anaerobic digestion. The effect of varying torrefaction temperature (225–300 ºC), torrefied biomass dosage (25–250 g/L), initial pH (2.0–9.0), and contact time (1–12 h) on furfural adsorption was studied with batch adsorption experiments. The furfural adsorption on torrefied biomass was best represented by pseudo second order kinetic model. The adsorption of furfural and other inhibitory compounds on torrefied biomass was likely a hydrophobic interaction. A maximum of 60% of furfural was adsorbed from torrefaction condensate containing 9000 mg furfural/L using 250 g/L of torrefied biomass in batch adsorption. For, column (20 mm internal diameter and 200 mm bed height), the saturation time for furfural adsorption was around 50 min. Anaerobic digestion of the detoxified torrefaction condensate shows that the lag phase in methane production was reduced from 25 d to 15 d for 0.2 volatile solid (VS)substrate:VSinoculum loading. The study shows that torrefaction condensate can be effectively detoxified using torrefied biomass for microbial conversion and can be integrated within the torrefied biomass pellet production process.

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Series: Chemical engineering journal
ISSN: 1385-8947
ISSN-E: 1873-3212
ISSN-L: 1385-8947
Issue: 334
Pages: 558 - 568
DOI: 10.1016/j.cej.2017.10.053
OADOI: https://oadoi.org/10.1016/j.cej.2017.10.053
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Subjects:
Funding: The authors gratefully acknowledge the TUT Postdoc funding program.
Copyright information: © 2017 Elsevier B.V. All rights reserved.