Tailoring pyrogenic products from pyrolysis of defatted Euglena gracilis using CO2 as reactive gas medium

Jong Min Jung; Sok Kim; Jechan Lee; Jeong Ik Oh; Yoon E. Choi; Eilhann E. Kwon

doi:10.1016/j.energy.2019.02.153

Tailoring pyrogenic products from pyrolysis of defatted Euglena gracilis using CO₂ as reactive gas medium

Jong Min Jung, Sok Kim, Jechan Lee, Jeong Ik Oh, Yoon E. Choi, Eilhann E. Kwon

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

15 Citations (Scopus)

Abstract

Pyrolysis of defatted Euglena gracilis was investigated in this study to maximize energy recovery from algal biomass after lipid extraction. Prior to pyrolysis of defatted E. gracilis, the growth rate of E. gracilis was monitored to determine its potential as an initial carbonaceous feedstock for pyrolysis. This study revealed that the cell density of E. gracilis linearly increased for the first 5 days, during which the cell density reached 6.06 ± 0.82 g L⁻¹, demonstrating that defatted E. gracilis is a promising feedstock for pyrolysis. To increase the thermal efficiency of defatted E. gracilis pyrolysis, CO₂ was employed as a reactive gas medium. CO levels were increased by 45% following pyrolysis of defatted E. gracilis in a CO₂ environment compared to in an N₂ environment. Considering that CO is a highly combustible permanent gas, the use of CO₂ in pyrolysis may result in the production of more fuel-range gaseous chemicals. Additionally, CO₂ utilization increased the gaseous product yield compared to N₂-pyrolysis for treating the defatted algal biomass while decreasing tar yield.

Original language	English
Pages (from-to)	184-190
Number of pages	7
Journal	Energy
Volume	174
DOIs	https://doi.org/10.1016/j.energy.2019.02.153
Publication status	Published - 2019 May 1

Keywords

Carbon dioxide
Euglena gracilis
Microalgae
Pyrolysis
Syngas
Thermo-chemical process

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Pollution
Mechanical Engineering
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

Access to Document

10.1016/j.energy.2019.02.153

Cite this

@article{8b75b596e2ab4b40abaf8078e9364b17,

title = "Tailoring pyrogenic products from pyrolysis of defatted Euglena gracilis using CO2 as reactive gas medium",

abstract = "Pyrolysis of defatted Euglena gracilis was investigated in this study to maximize energy recovery from algal biomass after lipid extraction. Prior to pyrolysis of defatted E. gracilis, the growth rate of E. gracilis was monitored to determine its potential as an initial carbonaceous feedstock for pyrolysis. This study revealed that the cell density of E. gracilis linearly increased for the first 5 days, during which the cell density reached 6.06 ± 0.82 g L−1, demonstrating that defatted E. gracilis is a promising feedstock for pyrolysis. To increase the thermal efficiency of defatted E. gracilis pyrolysis, CO2 was employed as a reactive gas medium. CO levels were increased by 45% following pyrolysis of defatted E. gracilis in a CO2 environment compared to in an N2 environment. Considering that CO is a highly combustible permanent gas, the use of CO2 in pyrolysis may result in the production of more fuel-range gaseous chemicals. Additionally, CO2 utilization increased the gaseous product yield compared to N2-pyrolysis for treating the defatted algal biomass while decreasing tar yield.",

keywords = "Carbon dioxide, Euglena gracilis, Microalgae, Pyrolysis, Syngas, Thermo-chemical process",

author = "Jung, {Jong Min} and Sok Kim and Jechan Lee and Oh, {Jeong Ik} and Choi, {Yoon E.} and Kwon, {Eilhann E.}",

note = "Funding Information: This work was supported by the Marine Biotechnology Program of the Korea Institute of Marine Science and Technology Promotion (KIMST) funded by the Ministry of Oceans and Fisheries (MOF) (No. 20170488 ). This research was also supported by the Government of South Korea through the National Research Foundation of Korea ( NRF-2018R1A6A3A11045442 ). Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

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doi = "10.1016/j.energy.2019.02.153",

language = "English",

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T1 - Tailoring pyrogenic products from pyrolysis of defatted Euglena gracilis using CO2 as reactive gas medium

AU - Jung, Jong Min

AU - Kim, Sok

AU - Lee, Jechan

AU - Oh, Jeong Ik

AU - Choi, Yoon E.

AU - Kwon, Eilhann E.

N1 - Funding Information: This work was supported by the Marine Biotechnology Program of the Korea Institute of Marine Science and Technology Promotion (KIMST) funded by the Ministry of Oceans and Fisheries (MOF) (No. 20170488 ). This research was also supported by the Government of South Korea through the National Research Foundation of Korea ( NRF-2018R1A6A3A11045442 ). Publisher Copyright: © 2019 Elsevier Ltd

PY - 2019/5/1

Y1 - 2019/5/1

N2 - Pyrolysis of defatted Euglena gracilis was investigated in this study to maximize energy recovery from algal biomass after lipid extraction. Prior to pyrolysis of defatted E. gracilis, the growth rate of E. gracilis was monitored to determine its potential as an initial carbonaceous feedstock for pyrolysis. This study revealed that the cell density of E. gracilis linearly increased for the first 5 days, during which the cell density reached 6.06 ± 0.82 g L−1, demonstrating that defatted E. gracilis is a promising feedstock for pyrolysis. To increase the thermal efficiency of defatted E. gracilis pyrolysis, CO2 was employed as a reactive gas medium. CO levels were increased by 45% following pyrolysis of defatted E. gracilis in a CO2 environment compared to in an N2 environment. Considering that CO is a highly combustible permanent gas, the use of CO2 in pyrolysis may result in the production of more fuel-range gaseous chemicals. Additionally, CO2 utilization increased the gaseous product yield compared to N2-pyrolysis for treating the defatted algal biomass while decreasing tar yield.

AB - Pyrolysis of defatted Euglena gracilis was investigated in this study to maximize energy recovery from algal biomass after lipid extraction. Prior to pyrolysis of defatted E. gracilis, the growth rate of E. gracilis was monitored to determine its potential as an initial carbonaceous feedstock for pyrolysis. This study revealed that the cell density of E. gracilis linearly increased for the first 5 days, during which the cell density reached 6.06 ± 0.82 g L−1, demonstrating that defatted E. gracilis is a promising feedstock for pyrolysis. To increase the thermal efficiency of defatted E. gracilis pyrolysis, CO2 was employed as a reactive gas medium. CO levels were increased by 45% following pyrolysis of defatted E. gracilis in a CO2 environment compared to in an N2 environment. Considering that CO is a highly combustible permanent gas, the use of CO2 in pyrolysis may result in the production of more fuel-range gaseous chemicals. Additionally, CO2 utilization increased the gaseous product yield compared to N2-pyrolysis for treating the defatted algal biomass while decreasing tar yield.

KW - Carbon dioxide

KW - Euglena gracilis

KW - Microalgae

KW - Pyrolysis

KW - Syngas

KW - Thermo-chemical process

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