Influence of strain-specific parameters on hydrothermal liquefaction of microalgae

Diego López Barreiro, Carlos Zamalloa, Nico Boon, Wim Vyverman, Frederik Ronsse, Wim Brilman, Wolter Prins

Research output: Contribution to journalArticlepeer-review

80 Scopus citations

Abstract

Algae are an interesting feedstock for producing biofuel via hydrothermal liquefaction (HTL), due to their high water content. In this study, algae slurries (5-7. wt% daf) from different species were liquefied at 250 and 375. °C in batch autoclaves during 5. min. The aim was to analyze the influence of strain-specific parameters (cell structure, biochemical composition and growth environment) on the HTL process. Results show big variations in the biocrude oil yield within species at 250. °C (from 17.6 to 44.8. wt%). At 375. °C, these differences become less significant (from 45.6 to 58.1. wt%). An appropriate characterization of feedstock appeared to be critical to interpret the results. If a high conversion of microalgae-to-biocrude is pursued, near critical conditions are required, with Scenedesmus almeriensis (freshwater) and Nannochloropsis gaditana (marine) leading to the biocrude oils with lower nitrogen content from each growth environment.

Original languageEnglish (US)
Pages (from-to)463-471
Number of pages9
JournalBioresource Technology
Volume146
DOIs
StatePublished - Oct 2013

Keywords

  • Biofuel production
  • Hydrothermal liquefaction
  • Microalgae

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