Biomass Conversion and Biorefinery

, Volume 7, Issue 4, pp 455–465 | Cite as

Conversion of a wet waste feedstock to biocrude by hydrothermal processing in a continuous-flow reactor: grape pomace

  • Douglas C. Elliott
  • Andrew J. Schmidt
  • Todd R. Hart
  • Justin M. BillingEmail author
Original Article


Wet waste feedstocks present an attractive opportunity for biomass conversion to fuels by hydrothermal processing. In this study, grape pomace slurries from two varieties, Montepulciano and cabernet sauvignon, have been converted into a biocrude by hydrothermal liquefaction (HTL) in a bench-scale, continuous-flow reactor system. Carbon conversion to gravity-separable biocrude product up to 56% was accomplished at relatively low temperature (350 °C) in a pressurized (sub-critical liquid water) environment (20 MPa) when using grape pomace feedstock slurry with a 16.8 wt% concentration of dry solids processed at a liquid hourly space velocity of 2.1 h−1. Direct biocrude recovery was achieved without the use of a solvent and biomass trace mineral components were removed by precipitation and filtration so that they did not cause processing difficulties. In addition, catalytic hydrothermal gasification (CHG) was effectively applied for HTL byproduct water cleanup using a Ru on C catalyst in a fixed bed producing a gas composed of methane and carbon dioxide from water-soluble organics. Conversion of 99.8% of the chemical oxygen demand (COD) left in the aqueous phase was demonstrated. As a result, high conversion of grape pomace to liquid and gas fuel products was found with residual organic contamination in byproduct water reduced to <150 mg/kg COD.


Hydrothermal liquefaction Catalyst Gasification Aqueous phase Grape pomace 



The authors acknowledge the support for this research provided by the US Department of Energy through its Bioenergy Technologies Office (BETO). Pacific Northwest National Laboratory is operated for the US Department of Energy by Battelle under Contract DE-AC06-76RL01830. Thanks are extended to Larry Oats of Sleeping Dog Winery in Benton City, Washington and Juan Munoz-Oca, Senior Director of Winemaking, Paterson Group of Wineries, Ste. Michelle Wine Estates, for making the grape pomace feedstocks available for these experiments.


  1. 1.
    Déniel M, Haarlemmer G, Roubaud A, Weiss-Hortala E, Fages J (2016) Energy valorisation of food processing residues and model compounds by hydrothermal liquefaction. Renew Sust Energ Rev 54:1632–1652. doi: 10.1016/j.rser.2015.10.017 CrossRefGoogle Scholar
  2. 2.
    Karpe AV, Beale DJ, Harding IH, Palombo EA (2014) Optimization of degradation of winery-derived biomass waste by Ascomycetes. J Chem Technol Biot 90(10):1793–1801. doi: 10.1002/jctb.4486 CrossRefGoogle Scholar
  3. 3.
    Elliott DC (2011) Hydrothermal processing. In: Brown RC (ed) Thermochemical processing of biomass: conversion into fuels, chemicals and power. John Wiley & Sons, Ltd., Chichester, pp 200–231CrossRefGoogle Scholar
  4. 4.
    Vardon DR, Sharma BK, Scott J, Yu G, Wang Z, Schideman L, Zhang Y, Strathman T (2011) Chemical properties of biocrude oil from the hydrothermal liquefaction of Spirulina algae, swine manure, and digested anaerobic sludge. Bioresour Technol 102:8295–8303. doi: 10.1016/j.biortech.2011.06.041 CrossRefGoogle Scholar
  5. 5.
    Marrone, P. (2016) Genifuel Hydrothermal Processing Bench-Scale Technology Evaluation Project. Water Environment & Reuse Foundation., Accessed 14 Sept 2016.
  6. 6.
    Barreiro DL, Prins W, Ronasse F, Brilman W (2013) Hydrothermal liquefaction (HTL) of microalgae for biofuel production: state of the art review and future prospects. Biomass Bioenergy 53:113–127. doi: 10.1016/j.biombioe.2012.12.029 CrossRefGoogle Scholar
  7. 7.
    Subagyono DJN, Marshall M, Jackson WR, Chaffee AL (2015) Pressurized thermal and hydrothermal decomposition of algae, wood chip residue, and grape marc: a comparative study. Biomass Bioenergy 76:141–157. doi: 10.1016/j.biombioe.2014.08.020 CrossRefGoogle Scholar
  8. 8.
    Subagyono DJN, Marshall M, Jackson WR, Chaffee AL (2015) Improvement in liquid fuel product quality from reactions of grape marc with CO/H2O. Fuel 159:234–240. doi: 10.1016/j.fuel.2015.06.042 CrossRefGoogle Scholar
  9. 9.
    Valdez PJ, Dickinson JG, Savage PE (2011) Characterization of product fractions from hydrothermal liquefaction of Nannochloropsis sp. and the influence of solvents. Energ Fuel 25(7):3235–3243CrossRefGoogle Scholar
  10. 10.
    Barreiro DL, Riede S, Hornung U, Kruse A, Prins W (2015) Hydrothermal liquefaction of microalgae: effect on the product yields of the addition of an organic solvent to separate the aqueous phase and the biocrude oil. Algal Res 12:206–212. doi: 10.1016/j.algal.2015.08.025 CrossRefGoogle Scholar
  11. 11.
    Biller P, Sharma BK, Kunwar B, Ross AB (2015) Hydroprocessing of bio-crude from continuous hydrothermal liquefaction of microalgae. Fuel 159:197–205. doi: 10.1016/j.fuel.2015.06.077 CrossRefGoogle Scholar
  12. 12.
    Barreiro DL, Gomez BR, Hornung U, Kruse A, Prins W (2015) Hydrothermal liquefaction of microalgae in a continuous stirred-tank reactor. Energ Fuel 29:6422–6432. doi: 10.1021/acs.energyfuels.5b02099 CrossRefGoogle Scholar
  13. 13.
    Eager RL, Mathews JF (1981) Studies on the products resulting from the conversion of aspen poplar to an oil. Can J Chem 59:2191–2198CrossRefGoogle Scholar
  14. 14.
    Elliott DC (2008) Catalytic hydrothermal gasification of biomass. Biofuels. Bioprod Bioref 2:254–265. doi: 10.1002/bbb.74 CrossRefGoogle Scholar
  15. 15.
    Osada M, Hiyoshi N, Sato O, Arai K, Shirai M (2007) Effect of sulfur on catalytic gasification of lignin in supercritical water. Energ Fuel 21:1400–1405CrossRefGoogle Scholar
  16. 16.
    Jazrawi C, Biller P, He Y, Montoya A, Ross AB, Maschmeyer T, Haynes BS (2015) Two-stage hydrothermal liquefaction of a high-protein microalga. Algal Res 8:15–22CrossRefGoogle Scholar
  17. 17.
    Elliott DC, Hart TR, Neuenschwander GG, Rotness LJ, Olarte MV, Zacher AH (2012) Chemical processing in high-pressure aqueous environments. 9. Process development for catalytic gasification of algae feedstocks. Ind Eng Chem Res 51:10768–10777. doi: 10.1021/ie300933w CrossRefGoogle Scholar
  18. 18.
    Channiwala SA, Parikh PP (2002) A unified correlation for estimating HHV of solid, liquid and gaseous fuels. Fuel 81:1051–1063CrossRefGoogle Scholar
  19. 19.
    Pedersen TH, Grigoras IF, Hoffmann J, Toor SS, Daraban IM, Jensen CU, Iversen SB, Madsen RB, Glasius M, Arturi KR, Nielsen RP, Søgaard EG, Rosendahl LA (2016) Continuous hydrothermal co-liquefaction of aspen wood and glycerol with water phase recirculation. Appl Energ 162:1034–1041. doi: 10.1016/j.apenergy.2015.10.165 CrossRefGoogle Scholar
  20. 20.
    Elliott DC, Biller P, Ross AB, Schmidt AJ, Jones SB (2015) Hydrothermal liquefaction of biomass: developments from batch to continuous process. Bioresour Technol 178:147–156. doi: 10.1016/j.biortech.2014.09.132 CrossRefGoogle Scholar
  21. 21.
    Jarvis JM, Billing JM, Hallen RT, Schmidt AJ, Schaub TM (2017) Hydrothermal liquefaction biocrude compositions compared to petroleum crude and shale oil. Energ Fuel 31:2896–2906. doi: 10.1021/acs.energyfuels.6b03022 CrossRefGoogle Scholar
  22. 22.
    Panisko E, Wietsma T, Lemmon T, Albrecht K, Howe D (2015) Characterization of the aqueous fractions from hydrotreatment and hydrothermal liquefaction of lignocellulosic feedstocks. Biomass Bioenergy 74:162–171. doi: 10.1016/j.biombioe.2015.01.011 CrossRefGoogle Scholar
  23. 23.
    Elliott DC, Hart TR, Schmidt AJ, Neuenschwander GG, Rotness LJ, Olarte MV, Zacher AH, Albrecht KO, Hallen RT, Holladay JE (2013) Process development for hydrothermal liquefaction of algae feedstocks in a continuous-flow reactor. Algal Res 2:445–454. doi: 10.1016/j.algal.2013.08.005 CrossRefGoogle Scholar
  24. 24.
    Elliott DC, Neuenschwander GG, Hart TR, Butner RS, Zacher AH, Engelhard MH, Young JS, McCready DE (2004) Chemical processing in high-pressure aqueous environments: 7. Process development of catalytic gasification of wet biomass feedstocks. Ind Eng Chem Res 43(9):1999–2004. doi: 10.1021/ie034303o CrossRefGoogle Scholar
  25. 25.
    Carrier M, Loppinet-Serani A, Absalon C, Marias F, Aymonier C, Mench M (2011) Conversion of fern (Pteris vittata L.) biomass from a phytoremediation trial in sub- and supercritical water conditions. Biomass Bioenergy 35:872–883. doi: 10.1016/j.biombioe.2010.11.007 CrossRefGoogle Scholar
  26. 26.
    Elliott DC, Hart TR, Neuenschwander GG (2006) Chemical processing in high-pressure aqueous environments. 8. Improved catalysts for hydrothermal gasification. Ind Eng Chem Res 45(11):3776–3781. doi: 10.1021/ie060031o CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Douglas C. Elliott
    • 1
  • Andrew J. Schmidt
    • 1
  • Todd R. Hart
    • 1
  • Justin M. Billing
    • 1
    Email author
  1. 1.Pacific Northwest National LaboratoryRichlandUSA

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