An investigation of reaction pathways of hydrothermal liquefaction using Chlorella pyrenoidosa and Spirulina platensis

Chao Gai; Yuanhui Zhang; Wan Ting Chen; Peng Zhang; Yuping Dong

doi:10.1016/j.enconman.2015.02.056

An investigation of reaction pathways of hydrothermal liquefaction using Chlorella pyrenoidosa and Spirulina platensis

Chao Gai, Yuanhui Zhang, Wan Ting Chen, Peng Zhang, Yuping Dong

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

Abstract

Low-lipid microalgae can be successfully converted to bio-crude oil in a hydrothermal liquefaction (HTL) environment. This study examined the behavior of hydrothermal liquefaction of two low-lipid content microalgae in subcritical water between 200 °C and 320 °C at 20 °C intervals. Under these conditions, the chemical composition and functional groups for the bio-crude oil and aqueous fraction were analyzed. Results indicated that reaction temperature greatly affected the distribution of chemical composition and functional groups of HTL bio-crude oil and aqueous fraction. The bio-crude oil with a higher percentage of aliphatic functional groups was obtained at higher reaction temperatures (280-320 °C). Besides, the aqueous fraction recovered under the same operating conditions had a lower concentration of nitrogenous organic compounds (NOCs) with two or more methyl groups. The general reaction network for HTL of low-lipid microalgae was proposed. The specific reaction pathways for microalgae substrates were analyzed in terms of lipid, protein and non-fibrous carbohydrate based on the spectral analysis.

Original language	English (US)
Pages (from-to)	330-339
Number of pages	10
Journal	Energy Conversion and Management
Volume	96
DOIs	https://doi.org/10.1016/j.enconman.2015.02.056
State	Published - May 15 2015

Keywords

Biofuel
Chlorella
Hydrothermal liquefaction
Low-lipid microalgae
Spirulina

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Nuclear Energy and Engineering
Fuel Technology
Energy Engineering and Power Technology

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10.1016/j.enconman.2015.02.056

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title = "An investigation of reaction pathways of hydrothermal liquefaction using Chlorella pyrenoidosa and Spirulina platensis",

abstract = "Low-lipid microalgae can be successfully converted to bio-crude oil in a hydrothermal liquefaction (HTL) environment. This study examined the behavior of hydrothermal liquefaction of two low-lipid content microalgae in subcritical water between 200 °C and 320 °C at 20 °C intervals. Under these conditions, the chemical composition and functional groups for the bio-crude oil and aqueous fraction were analyzed. Results indicated that reaction temperature greatly affected the distribution of chemical composition and functional groups of HTL bio-crude oil and aqueous fraction. The bio-crude oil with a higher percentage of aliphatic functional groups was obtained at higher reaction temperatures (280-320 °C). Besides, the aqueous fraction recovered under the same operating conditions had a lower concentration of nitrogenous organic compounds (NOCs) with two or more methyl groups. The general reaction network for HTL of low-lipid microalgae was proposed. The specific reaction pathways for microalgae substrates were analyzed in terms of lipid, protein and non-fibrous carbohydrate based on the spectral analysis.",

keywords = "Biofuel, Chlorella, Hydrothermal liquefaction, Low-lipid microalgae, Spirulina",

author = "Chao Gai and Yuanhui Zhang and Chen, {Wan Ting} and Peng Zhang and Yuping Dong",

note = "Funding Information: The financial support from China Scholarship Council and National Science and Technology support program ( 2011YQ120039 ) is grateful acknowledged. The authors thank the Department of Agricultural and Biological Engineering at University of Illinois at Urbana-Champaign for their help on providing the facilities and supplies. The authors also thank the researchers in the Bioenvironmental Engineering Division at University of Illinois at Urbana-Champaign for their kind help on the research. Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd. All rights reserved.",

year = "2015",

month = may,

day = "15",

doi = "10.1016/j.enconman.2015.02.056",

language = "English (US)",

volume = "96",

pages = "330--339",

journal = "Energy Conversion and Management",

issn = "0196-8904",

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T1 - An investigation of reaction pathways of hydrothermal liquefaction using Chlorella pyrenoidosa and Spirulina platensis

AU - Gai, Chao

AU - Zhang, Yuanhui

AU - Chen, Wan Ting

AU - Zhang, Peng

AU - Dong, Yuping

N1 - Funding Information: The financial support from China Scholarship Council and National Science and Technology support program ( 2011YQ120039 ) is grateful acknowledged. The authors thank the Department of Agricultural and Biological Engineering at University of Illinois at Urbana-Champaign for their help on providing the facilities and supplies. The authors also thank the researchers in the Bioenvironmental Engineering Division at University of Illinois at Urbana-Champaign for their kind help on the research. Publisher Copyright: © 2015 Elsevier Ltd. All rights reserved.

PY - 2015/5/15

Y1 - 2015/5/15

N2 - Low-lipid microalgae can be successfully converted to bio-crude oil in a hydrothermal liquefaction (HTL) environment. This study examined the behavior of hydrothermal liquefaction of two low-lipid content microalgae in subcritical water between 200 °C and 320 °C at 20 °C intervals. Under these conditions, the chemical composition and functional groups for the bio-crude oil and aqueous fraction were analyzed. Results indicated that reaction temperature greatly affected the distribution of chemical composition and functional groups of HTL bio-crude oil and aqueous fraction. The bio-crude oil with a higher percentage of aliphatic functional groups was obtained at higher reaction temperatures (280-320 °C). Besides, the aqueous fraction recovered under the same operating conditions had a lower concentration of nitrogenous organic compounds (NOCs) with two or more methyl groups. The general reaction network for HTL of low-lipid microalgae was proposed. The specific reaction pathways for microalgae substrates were analyzed in terms of lipid, protein and non-fibrous carbohydrate based on the spectral analysis.

AB - Low-lipid microalgae can be successfully converted to bio-crude oil in a hydrothermal liquefaction (HTL) environment. This study examined the behavior of hydrothermal liquefaction of two low-lipid content microalgae in subcritical water between 200 °C and 320 °C at 20 °C intervals. Under these conditions, the chemical composition and functional groups for the bio-crude oil and aqueous fraction were analyzed. Results indicated that reaction temperature greatly affected the distribution of chemical composition and functional groups of HTL bio-crude oil and aqueous fraction. The bio-crude oil with a higher percentage of aliphatic functional groups was obtained at higher reaction temperatures (280-320 °C). Besides, the aqueous fraction recovered under the same operating conditions had a lower concentration of nitrogenous organic compounds (NOCs) with two or more methyl groups. The general reaction network for HTL of low-lipid microalgae was proposed. The specific reaction pathways for microalgae substrates were analyzed in terms of lipid, protein and non-fibrous carbohydrate based on the spectral analysis.

KW - Biofuel

KW - Chlorella

KW - Hydrothermal liquefaction

KW - Low-lipid microalgae

KW - Spirulina

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JO - Energy Conversion and Management

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SN - 0196-8904

ER -

An investigation of reaction pathways of hydrothermal liquefaction using Chlorella pyrenoidosa and Spirulina platensis

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Keywords

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