The storage stability of biocrude obtained by the hydrothermal liquefaction of microalgae

Sofia Raikova, Rubén Darío Godoy-Silva, Alejandra Palomino, Christopher Chuck

Research output: Contribution to journalArticle

Abstract

Hydrothermal liquefaction (HTL) is a promising technology that can produce biocrude oil from wet biomass. The biocrudes, while generally acknowledged to be more stable than pyrolysis oils, are still thought to degrade relatively quickly, which limits their applicability. In this investigation, the storage stability of biocrude produced from hydrothermal liquefaction of microalgae was systematically studied over 60 days, and the effect of the storage material, feedstock species, liquefaction temperature and storage temperature were assessed. Biocrudes obtained at 300 °C and 350 °C from the microalgae Spirulina and Chlorella vulgaris were stored at three temperatures: cold (4 °C), ambient (20 °C) and elevated temperatures (35 °C), over the two-month period. The dynamic viscosity, higher heating value, thermogravimetric analysis and elemental and chemical composition were assessed. The viscosity of the biocrudes only increased considerably at 35 °C. The reaction temperature and biomass type were also strong determining factors of the impact on biocrude stability. Biocrudes produced from C. vulgaris were more stable than the Spirulina, and the crudes formed at 350 °C were considerably less reactive than those produced at 300 °C. This demonstrates that biocrudes can be stored without substantial degradation, allowing a more flexible approach to upgrading to value products.

Original languageEnglish
Pages (from-to)1720-1729
Number of pages10
JournalRenewable Energy
Volume145
Early online date17 Jul 2019
DOIs
Publication statusE-pub ahead of print - 17 Jul 2019

Keywords

  • Ageing
  • Biocrude
  • Chlorella
  • HTL
  • Microalgae
  • Oxidation
  • Spirulina

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

Cite this

The storage stability of biocrude obtained by the hydrothermal liquefaction of microalgae. / Raikova, Sofia; Godoy-Silva, Rubén Darío ; Palomino, Alejandra ; Chuck, Christopher.

In: Renewable Energy, Vol. 145, 01.01.2020, p. 1720-1729.

Research output: Contribution to journalArticle

Raikova, Sofia ; Godoy-Silva, Rubén Darío ; Palomino, Alejandra ; Chuck, Christopher. / The storage stability of biocrude obtained by the hydrothermal liquefaction of microalgae. In: Renewable Energy. 2020 ; Vol. 145. pp. 1720-1729.
@article{0da16324c0504e28bb68e230962d8dcc,
title = "The storage stability of biocrude obtained by the hydrothermal liquefaction of microalgae",
abstract = "Hydrothermal liquefaction (HTL) is a promising technology that can produce biocrude oil from wet biomass. The biocrudes, while generally acknowledged to be more stable than pyrolysis oils, are still thought to degrade relatively quickly, which limits their applicability. In this investigation, the storage stability of biocrude produced from hydrothermal liquefaction of microalgae was systematically studied over 60 days, and the effect of the storage material, feedstock species, liquefaction temperature and storage temperature were assessed. Biocrudes obtained at 300 °C and 350 °C from the microalgae Spirulina and Chlorella vulgaris were stored at three temperatures: cold (4 °C), ambient (20 °C) and elevated temperatures (35 °C), over the two-month period. The dynamic viscosity, higher heating value, thermogravimetric analysis and elemental and chemical composition were assessed. The viscosity of the biocrudes only increased considerably at 35 °C. The reaction temperature and biomass type were also strong determining factors of the impact on biocrude stability. Biocrudes produced from C. vulgaris were more stable than the Spirulina, and the crudes formed at 350 °C were considerably less reactive than those produced at 300 °C. This demonstrates that biocrudes can be stored without substantial degradation, allowing a more flexible approach to upgrading to value products.",
keywords = "Ageing, Biocrude, Chlorella, HTL, Microalgae, Oxidation, Spirulina",
author = "Sofia Raikova and Godoy-Silva, {Rub{\'e}n Dar{\'i}o} and Alejandra Palomino and Christopher Chuck",
year = "2019",
month = "7",
day = "17",
doi = "10.1016/j.renene.2019.07.084",
language = "English",
volume = "145",
pages = "1720--1729",
journal = "Renewable Energy",
issn = "0960-1481",
publisher = "Elsevier",

}

TY - JOUR

T1 - The storage stability of biocrude obtained by the hydrothermal liquefaction of microalgae

AU - Raikova, Sofia

AU - Godoy-Silva, Rubén Darío

AU - Palomino, Alejandra

AU - Chuck, Christopher

PY - 2019/7/17

Y1 - 2019/7/17

N2 - Hydrothermal liquefaction (HTL) is a promising technology that can produce biocrude oil from wet biomass. The biocrudes, while generally acknowledged to be more stable than pyrolysis oils, are still thought to degrade relatively quickly, which limits their applicability. In this investigation, the storage stability of biocrude produced from hydrothermal liquefaction of microalgae was systematically studied over 60 days, and the effect of the storage material, feedstock species, liquefaction temperature and storage temperature were assessed. Biocrudes obtained at 300 °C and 350 °C from the microalgae Spirulina and Chlorella vulgaris were stored at three temperatures: cold (4 °C), ambient (20 °C) and elevated temperatures (35 °C), over the two-month period. The dynamic viscosity, higher heating value, thermogravimetric analysis and elemental and chemical composition were assessed. The viscosity of the biocrudes only increased considerably at 35 °C. The reaction temperature and biomass type were also strong determining factors of the impact on biocrude stability. Biocrudes produced from C. vulgaris were more stable than the Spirulina, and the crudes formed at 350 °C were considerably less reactive than those produced at 300 °C. This demonstrates that biocrudes can be stored without substantial degradation, allowing a more flexible approach to upgrading to value products.

AB - Hydrothermal liquefaction (HTL) is a promising technology that can produce biocrude oil from wet biomass. The biocrudes, while generally acknowledged to be more stable than pyrolysis oils, are still thought to degrade relatively quickly, which limits their applicability. In this investigation, the storage stability of biocrude produced from hydrothermal liquefaction of microalgae was systematically studied over 60 days, and the effect of the storage material, feedstock species, liquefaction temperature and storage temperature were assessed. Biocrudes obtained at 300 °C and 350 °C from the microalgae Spirulina and Chlorella vulgaris were stored at three temperatures: cold (4 °C), ambient (20 °C) and elevated temperatures (35 °C), over the two-month period. The dynamic viscosity, higher heating value, thermogravimetric analysis and elemental and chemical composition were assessed. The viscosity of the biocrudes only increased considerably at 35 °C. The reaction temperature and biomass type were also strong determining factors of the impact on biocrude stability. Biocrudes produced from C. vulgaris were more stable than the Spirulina, and the crudes formed at 350 °C were considerably less reactive than those produced at 300 °C. This demonstrates that biocrudes can be stored without substantial degradation, allowing a more flexible approach to upgrading to value products.

KW - Ageing

KW - Biocrude

KW - Chlorella

KW - HTL

KW - Microalgae

KW - Oxidation

KW - Spirulina

UR - http://www.scopus.com/inward/record.url?scp=85069674986&partnerID=8YFLogxK

U2 - 10.1016/j.renene.2019.07.084

DO - 10.1016/j.renene.2019.07.084

M3 - Article

VL - 145

SP - 1720

EP - 1729

JO - Renewable Energy

JF - Renewable Energy

SN - 0960-1481

ER -