Non-catalytic in-situ (trans)esterification of lipids in wet microalgae Chlorella vulgaris under subcritical conditions for the synthesis of fatty acid methyl esters

Charles Felix, Aristotle Ubando, Cynthia Madrazo, Ivan Henderson Gue, Sylviana Sutanto, Phuong Lan Tran-Nguyen, Alchris Woo Go, Yi Hsu Ju, Alvin Culaba, Jo Shu Chang, Wei Hsin Chen

研究成果: Article

1 引文 (Scopus)

摘要

Microalgae offer promising and multifaceted solutions to the ongoing issues regarding energy security and climate change. One of the major bottlenecks in utilizing algal biomass is the excessive amount of moisture to be managed after harvest, which translates to costs in the dewatering step. Newer strategies have been developed to be able to convert algal biomass feedstock to biodiesel without the need for extraction and drying, such as in-situ transesterification. This process can be improved by concurrently subjecting the system under subcritical conditions, which could also potentially remove the use of catalysts as well as offer tolerance to free fatty acid content of the feedstock. A definitive screening design of experiment was utilized to provide an acceptable prediction on the effects of key process parameters – temperature, reaction time, and solvent-to-solid ratio to the obtainable fatty acid methyl ester (FAME)yield and process power consumption. The optimum operating condition, which combines the benefits of maximizing the FAME yield and minimizing the process power consumption was found to be at 220 °C, 2 h, and 8 ml methanol per gram of biomass (80 wt% moisture). This produces a FAME yield of 74.6% with respect to the maximum obtainable FAME. Sensitivity analysis discussed the implications regarding the weight of importance between the two responses of interest. The benefits of the proposed process can be observed when compared to its conventional transesterification counterpart in terms of energy savings and reduced environmental impact. Hence, this process offers a feasible alternative to produce biodiesel from microalgae.

原文English
頁(從 - 到)526-537
頁數12
期刊Applied Energy
248
DOIs
出版狀態Published - 2019 八月 15

指紋

Transesterification
Fatty acids
Lipids
ester
Esters
fatty acid
lipid
Biomass
Biodiesel
Feedstocks
biomass
Electric power utilization
Moisture
moisture
Energy security
Dewatering
dewatering
Climate change
Design of experiments
Sensitivity analysis

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Energy(all)
  • Mechanical Engineering
  • Management, Monitoring, Policy and Law

引用此文

Felix, Charles ; Ubando, Aristotle ; Madrazo, Cynthia ; Gue, Ivan Henderson ; Sutanto, Sylviana ; Tran-Nguyen, Phuong Lan ; Go, Alchris Woo ; Ju, Yi Hsu ; Culaba, Alvin ; Chang, Jo Shu ; Chen, Wei Hsin. / Non-catalytic in-situ (trans)esterification of lipids in wet microalgae Chlorella vulgaris under subcritical conditions for the synthesis of fatty acid methyl esters. 於: Applied Energy. 2019 ; 卷 248. 頁 526-537.
@article{f6f5349f52df4217997331a3f5a0856a,
title = "Non-catalytic in-situ (trans)esterification of lipids in wet microalgae Chlorella vulgaris under subcritical conditions for the synthesis of fatty acid methyl esters",
abstract = "Microalgae offer promising and multifaceted solutions to the ongoing issues regarding energy security and climate change. One of the major bottlenecks in utilizing algal biomass is the excessive amount of moisture to be managed after harvest, which translates to costs in the dewatering step. Newer strategies have been developed to be able to convert algal biomass feedstock to biodiesel without the need for extraction and drying, such as in-situ transesterification. This process can be improved by concurrently subjecting the system under subcritical conditions, which could also potentially remove the use of catalysts as well as offer tolerance to free fatty acid content of the feedstock. A definitive screening design of experiment was utilized to provide an acceptable prediction on the effects of key process parameters – temperature, reaction time, and solvent-to-solid ratio to the obtainable fatty acid methyl ester (FAME)yield and process power consumption. The optimum operating condition, which combines the benefits of maximizing the FAME yield and minimizing the process power consumption was found to be at 220 °C, 2 h, and 8 ml methanol per gram of biomass (80 wt{\%} moisture). This produces a FAME yield of 74.6{\%} with respect to the maximum obtainable FAME. Sensitivity analysis discussed the implications regarding the weight of importance between the two responses of interest. The benefits of the proposed process can be observed when compared to its conventional transesterification counterpart in terms of energy savings and reduced environmental impact. Hence, this process offers a feasible alternative to produce biodiesel from microalgae.",
author = "Charles Felix and Aristotle Ubando and Cynthia Madrazo and Gue, {Ivan Henderson} and Sylviana Sutanto and Tran-Nguyen, {Phuong Lan} and Go, {Alchris Woo} and Ju, {Yi Hsu} and Alvin Culaba and Chang, {Jo Shu} and Chen, {Wei Hsin}",
year = "2019",
month = "8",
day = "15",
doi = "10.1016/j.apenergy.2019.04.149",
language = "English",
volume = "248",
pages = "526--537",
journal = "Applied Energy",
issn = "0306-2619",
publisher = "Elsevier BV",

}

Non-catalytic in-situ (trans)esterification of lipids in wet microalgae Chlorella vulgaris under subcritical conditions for the synthesis of fatty acid methyl esters. / Felix, Charles; Ubando, Aristotle; Madrazo, Cynthia; Gue, Ivan Henderson; Sutanto, Sylviana; Tran-Nguyen, Phuong Lan; Go, Alchris Woo; Ju, Yi Hsu; Culaba, Alvin; Chang, Jo Shu; Chen, Wei Hsin.

於: Applied Energy, 卷 248, 15.08.2019, p. 526-537.

研究成果: Article

TY - JOUR

T1 - Non-catalytic in-situ (trans)esterification of lipids in wet microalgae Chlorella vulgaris under subcritical conditions for the synthesis of fatty acid methyl esters

AU - Felix, Charles

AU - Ubando, Aristotle

AU - Madrazo, Cynthia

AU - Gue, Ivan Henderson

AU - Sutanto, Sylviana

AU - Tran-Nguyen, Phuong Lan

AU - Go, Alchris Woo

AU - Ju, Yi Hsu

AU - Culaba, Alvin

AU - Chang, Jo Shu

AU - Chen, Wei Hsin

PY - 2019/8/15

Y1 - 2019/8/15

N2 - Microalgae offer promising and multifaceted solutions to the ongoing issues regarding energy security and climate change. One of the major bottlenecks in utilizing algal biomass is the excessive amount of moisture to be managed after harvest, which translates to costs in the dewatering step. Newer strategies have been developed to be able to convert algal biomass feedstock to biodiesel without the need for extraction and drying, such as in-situ transesterification. This process can be improved by concurrently subjecting the system under subcritical conditions, which could also potentially remove the use of catalysts as well as offer tolerance to free fatty acid content of the feedstock. A definitive screening design of experiment was utilized to provide an acceptable prediction on the effects of key process parameters – temperature, reaction time, and solvent-to-solid ratio to the obtainable fatty acid methyl ester (FAME)yield and process power consumption. The optimum operating condition, which combines the benefits of maximizing the FAME yield and minimizing the process power consumption was found to be at 220 °C, 2 h, and 8 ml methanol per gram of biomass (80 wt% moisture). This produces a FAME yield of 74.6% with respect to the maximum obtainable FAME. Sensitivity analysis discussed the implications regarding the weight of importance between the two responses of interest. The benefits of the proposed process can be observed when compared to its conventional transesterification counterpart in terms of energy savings and reduced environmental impact. Hence, this process offers a feasible alternative to produce biodiesel from microalgae.

AB - Microalgae offer promising and multifaceted solutions to the ongoing issues regarding energy security and climate change. One of the major bottlenecks in utilizing algal biomass is the excessive amount of moisture to be managed after harvest, which translates to costs in the dewatering step. Newer strategies have been developed to be able to convert algal biomass feedstock to biodiesel without the need for extraction and drying, such as in-situ transesterification. This process can be improved by concurrently subjecting the system under subcritical conditions, which could also potentially remove the use of catalysts as well as offer tolerance to free fatty acid content of the feedstock. A definitive screening design of experiment was utilized to provide an acceptable prediction on the effects of key process parameters – temperature, reaction time, and solvent-to-solid ratio to the obtainable fatty acid methyl ester (FAME)yield and process power consumption. The optimum operating condition, which combines the benefits of maximizing the FAME yield and minimizing the process power consumption was found to be at 220 °C, 2 h, and 8 ml methanol per gram of biomass (80 wt% moisture). This produces a FAME yield of 74.6% with respect to the maximum obtainable FAME. Sensitivity analysis discussed the implications regarding the weight of importance between the two responses of interest. The benefits of the proposed process can be observed when compared to its conventional transesterification counterpart in terms of energy savings and reduced environmental impact. Hence, this process offers a feasible alternative to produce biodiesel from microalgae.

UR - http://www.scopus.com/inward/record.url?scp=85064591461&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85064591461&partnerID=8YFLogxK

U2 - 10.1016/j.apenergy.2019.04.149

DO - 10.1016/j.apenergy.2019.04.149

M3 - Article

AN - SCOPUS:85064591461

VL - 248

SP - 526

EP - 537

JO - Applied Energy

JF - Applied Energy

SN - 0306-2619

ER -