Hydrothermal liquefaction of Chlorella pyrenoidosa in sub- and supercritical ethanol with heterogeneous catalysts

Jixiang Zhang; Wan Ting Chen; Peng Zhang; Zhongyang Luo; Yuanhui Zhang

doi:10.1016/j.biortech.2013.01.076

Hydrothermal liquefaction of Chlorella pyrenoidosa in sub- and supercritical ethanol with heterogeneous catalysts

Jixiang Zhang, Wan Ting Chen, Peng Zhang, Zhongyang Luo, Yuanhui Zhang

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

Abstract

Hydrothermal liquefaction (HTL) of low lipid content microalgae Chlorella pyrenoidosa with heterogeneous catalysts was processed under sub- and supercritical conditions of ethanol (200-300°C, 2.8-9.0MPa, 30min). The HTL products were separated into bio-crude, gas, solid residue and volatile components, and then characterized. The highest mass and energy recovery ratios of bio-crude on the dry basis of alga were 71.3% and 101.8% respectively, obtained at 240°C, while the highest higher heating value of bio-crude was 36.19MJ/kg, obtained at 300°C. Temperature was found to be the most dominant parameter. H₂ as a processing gas at an initial pressure of 1.03MPa slightly improved the bio-crude yield and quality. Raney-Ni and HZSM-5 type zeolite catalysts had no significant effect on the presented HTL process. The results indicated that HTL with ethanol as the solvent was able to produce 50-70wt.% of bio-crude directly from C. pyrenoidosa.

Original language	English (US)
Pages (from-to)	389-397
Number of pages	9
Journal	Bioresource Technology
Volume	133
DOIs	https://doi.org/10.1016/j.biortech.2013.01.076
State	Published - Apr 2013

Keywords

Bio-crude
Catalyst
Ethanol
Hydrothermal liquefaction
Microalgae

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Waste Management and Disposal

Online availability

10.1016/j.biortech.2013.01.076

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title = "Hydrothermal liquefaction of Chlorella pyrenoidosa in sub- and supercritical ethanol with heterogeneous catalysts",

abstract = "Hydrothermal liquefaction (HTL) of low lipid content microalgae Chlorella pyrenoidosa with heterogeneous catalysts was processed under sub- and supercritical conditions of ethanol (200-300°C, 2.8-9.0MPa, 30min). The HTL products were separated into bio-crude, gas, solid residue and volatile components, and then characterized. The highest mass and energy recovery ratios of bio-crude on the dry basis of alga were 71.3% and 101.8% respectively, obtained at 240°C, while the highest higher heating value of bio-crude was 36.19MJ/kg, obtained at 300°C. Temperature was found to be the most dominant parameter. H2 as a processing gas at an initial pressure of 1.03MPa slightly improved the bio-crude yield and quality. Raney-Ni and HZSM-5 type zeolite catalysts had no significant effect on the presented HTL process. The results indicated that HTL with ethanol as the solvent was able to produce 50-70wt.% of bio-crude directly from C. pyrenoidosa.",

keywords = "Bio-crude, Catalyst, Ethanol, Hydrothermal liquefaction, Microalgae",

author = "Jixiang Zhang and Chen, {Wan Ting} and Peng Zhang and Zhongyang Luo and Yuanhui Zhang",

note = "Funding Information: The authors appreciate the financial support from China Scholarship Council to sponsor the living expense for study abroad; and the University of Illinois for providing the experiment facilities and supplies for the research. Acknowledgment also goes to fellow graduate students and researchers in the Bioenvironmental Engineering Division at University of Illinois at Urbana-Champaign, for their assistance during the project. ",

year = "2013",

month = apr,

doi = "10.1016/j.biortech.2013.01.076",

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volume = "133",

pages = "389--397",

journal = "Agricultural Wastes",

issn = "0960-8524",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - Hydrothermal liquefaction of Chlorella pyrenoidosa in sub- and supercritical ethanol with heterogeneous catalysts

AU - Zhang, Jixiang

AU - Chen, Wan Ting

AU - Zhang, Peng

AU - Luo, Zhongyang

AU - Zhang, Yuanhui

N1 - Funding Information: The authors appreciate the financial support from China Scholarship Council to sponsor the living expense for study abroad; and the University of Illinois for providing the experiment facilities and supplies for the research. Acknowledgment also goes to fellow graduate students and researchers in the Bioenvironmental Engineering Division at University of Illinois at Urbana-Champaign, for their assistance during the project.

PY - 2013/4

Y1 - 2013/4

N2 - Hydrothermal liquefaction (HTL) of low lipid content microalgae Chlorella pyrenoidosa with heterogeneous catalysts was processed under sub- and supercritical conditions of ethanol (200-300°C, 2.8-9.0MPa, 30min). The HTL products were separated into bio-crude, gas, solid residue and volatile components, and then characterized. The highest mass and energy recovery ratios of bio-crude on the dry basis of alga were 71.3% and 101.8% respectively, obtained at 240°C, while the highest higher heating value of bio-crude was 36.19MJ/kg, obtained at 300°C. Temperature was found to be the most dominant parameter. H2 as a processing gas at an initial pressure of 1.03MPa slightly improved the bio-crude yield and quality. Raney-Ni and HZSM-5 type zeolite catalysts had no significant effect on the presented HTL process. The results indicated that HTL with ethanol as the solvent was able to produce 50-70wt.% of bio-crude directly from C. pyrenoidosa.

AB - Hydrothermal liquefaction (HTL) of low lipid content microalgae Chlorella pyrenoidosa with heterogeneous catalysts was processed under sub- and supercritical conditions of ethanol (200-300°C, 2.8-9.0MPa, 30min). The HTL products were separated into bio-crude, gas, solid residue and volatile components, and then characterized. The highest mass and energy recovery ratios of bio-crude on the dry basis of alga were 71.3% and 101.8% respectively, obtained at 240°C, while the highest higher heating value of bio-crude was 36.19MJ/kg, obtained at 300°C. Temperature was found to be the most dominant parameter. H2 as a processing gas at an initial pressure of 1.03MPa slightly improved the bio-crude yield and quality. Raney-Ni and HZSM-5 type zeolite catalysts had no significant effect on the presented HTL process. The results indicated that HTL with ethanol as the solvent was able to produce 50-70wt.% of bio-crude directly from C. pyrenoidosa.

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KW - Microalgae

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Hydrothermal liquefaction of Chlorella pyrenoidosa in sub- and supercritical ethanol with heterogeneous catalysts

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