Near- and supercritical ethanol treatment of biocrude from hydrothermal liquefaction of microalgae

Le Yang; Yongdan Li; Phillip E. Savage

doi:10.1016/j.biortech.2016.03.151

Near- and supercritical ethanol treatment of biocrude from hydrothermal liquefaction of microalgae

Le Yang, Yongdan Li, Phillip E. Savage

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

Biocrude produced from algae by hydrothermal liquefaction was treated with near- and supercritical ethanol and ethanol-water mixtures at 210-290 °C for 0.5-4 h. Longer reaction times and higher temperatures better promoted esterification reactions. Dilution of the ethanol with water led to lower yields of treated biocrude and reduced ester content. The viscosity of treated biocrude was an order of magnitude lower than that of the crude bio-oil, and the treated biocrude exhibited the characteristics of a Newtonian fluid. Overall, treatment of biocrude with near- and supercritical ethanol generated a treated bio-oil with lower viscosity, more ester content, and in nearly 100 wt% yield.

Original language	English (US)
Pages (from-to)	779-782
Number of pages	4
Journal	Bioresource technology
Volume	211
DOIs	https://doi.org/10.1016/j.biortech.2016.03.151
State	Published - Jul 1 2016

All Science Journal Classification (ASJC) codes

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

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10.1016/j.biortech.2016.03.151

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title = "Near- and supercritical ethanol treatment of biocrude from hydrothermal liquefaction of microalgae",

abstract = "Biocrude produced from algae by hydrothermal liquefaction was treated with near- and supercritical ethanol and ethanol-water mixtures at 210-290 °C for 0.5-4 h. Longer reaction times and higher temperatures better promoted esterification reactions. Dilution of the ethanol with water led to lower yields of treated biocrude and reduced ester content. The viscosity of treated biocrude was an order of magnitude lower than that of the crude bio-oil, and the treated biocrude exhibited the characteristics of a Newtonian fluid. Overall, treatment of biocrude with near- and supercritical ethanol generated a treated bio-oil with lower viscosity, more ester content, and in nearly 100 wt% yield.",

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doi = "10.1016/j.biortech.2016.03.151",

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AU - Yang, Le

AU - Li, Yongdan

AU - Savage, Phillip E.

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AB - Biocrude produced from algae by hydrothermal liquefaction was treated with near- and supercritical ethanol and ethanol-water mixtures at 210-290 °C for 0.5-4 h. Longer reaction times and higher temperatures better promoted esterification reactions. Dilution of the ethanol with water led to lower yields of treated biocrude and reduced ester content. The viscosity of treated biocrude was an order of magnitude lower than that of the crude bio-oil, and the treated biocrude exhibited the characteristics of a Newtonian fluid. Overall, treatment of biocrude with near- and supercritical ethanol generated a treated bio-oil with lower viscosity, more ester content, and in nearly 100 wt% yield.

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Near- and supercritical ethanol treatment of biocrude from hydrothermal liquefaction of microalgae

Abstract

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