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 |
| 卷 | 248 |
| DOIs | |
| 出版狀態 | Published - 2019 八月 15 |
指紋
All Science Journal Classification (ASJC) codes
- Building and Construction
- Energy(all)
- Mechanical Engineering
- Management, Monitoring, Policy and Law
引用此文
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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 -