Influence of strain-specific parameters on hydrothermal liquefaction of microalgae

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• 作者：Diego L¨®pez Barreiro ; Carlos Zamalloa ; Nico Boon ; Wim Vyverman ; Frederik Ronsse ; Wim Brilman ; Wolter Prins
• 关键词：Microalgae ; Hydrothermal liquefaction ; Biofuel production
• 刊名：Bioresource Technology
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：146
• 期：Complete
• 页码：463-471
• 全文大小：1377 K

文摘

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 ¡ãC 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 ¡ãC (from 17.6 to 44.8 wt % ). At 375 ¡ãC, 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.