Temperature effect on hydrothermal liquefaction of Nannochloropsis gaditana and Chlorella sp.

Harvind Kumar Reddy; Tapaswy Muppaneni; Sundaravadivelnathan Ponnusamy; Nilusha Sudasinghe; Ambica Pegallapati; Thinesh Selvaratnam; Mark Seger; Barry Dungan; Nagamany Nirmalakhandan; Tanner Schaub; F. Omar Holguin; Peter Lammers; Wayne Voorhies; Shuguang Deng

doi:10.1016/j.apenergy.2015.11.067

Temperature effect on hydrothermal liquefaction of Nannochloropsis gaditana and Chlorella sp.

Harvind Kumar Reddy, Tapaswy Muppaneni, Sundaravadivelnathan Ponnusamy, Nilusha Sudasinghe, Ambica Pegallapati, Thinesh Selvaratnam, Mark Seger, Barry Dungan, Nagamany Nirmalakhandan, Tanner Schaub, F. Omar Holguin, Peter Lammers, Wayne Voorhies, Shuguang Deng

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

126 Scopus citations

Abstract

Temperature effect on hydrothermal liquefaction (HTL) of Nannochloropsis gaditana and Chlorella sp. was investigated with 10% biomass loading at HTL temperatures of 180-330°C, and reaction time of 30 min. Maximum yields of 47.5% for Nannochloropsis sp. and 32.5% biocrude oil yields for Chlorella sp. were obtained at 300°C. The higher heating values of biocrude oils produced in this work ranged between 34 and 39 MJ/kg. 79% of energy in the Nannochloropsis sp. was recovered at 300°C and 62% of energy recovery from Chlorella sp. was achieved at 200°C. Valuable nutrients (NH₃-N and PO₄³^-⁾ produced during the HTL process were quantified from the aqueous phase for both strains of biomass. The aqueous phase samples obtained at all temperatures were also analyzed for amino acids and carbohydrates. The suitable temperatures for extraction of lipids, amino acids and carbohydrates have been identified. Sequential HTL experiments conducted have shown the prospect of recovering nutrients and other valuable byproducts along with biocrude oil. The experimental results and analysis indicate that sustainable biofuel production requires the development of strain based strategies for the hydrothermal liquefaction process.

Original language	English (US)
Pages (from-to)	943-951
Number of pages	9
Journal	Applied Energy
Volume	165
DOIs	https://doi.org/10.1016/j.apenergy.2015.11.067
State	Published - Mar 1 2016
Externally published	Yes

Keywords

By-products
Energy recovery
Hydrothermal liquefaction
Nutrients
Sequential extraction and liquefaction
Wet algae

ASJC Scopus subject areas

Mechanical Engineering
General Energy
Management, Monitoring, Policy and Law
Building and Construction
Renewable Energy, Sustainability and the Environment

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Reddy, H. K., Muppaneni, T., Ponnusamy, S., Sudasinghe, N., Pegallapati, A., Selvaratnam, T., Seger, M., Dungan, B., Nirmalakhandan, N., Schaub, T., Holguin, F. O., Lammers, P., Voorhies, W., & Deng, S. (2016). Temperature effect on hydrothermal liquefaction of Nannochloropsis gaditana and Chlorella sp. Applied Energy, 165, 943-951. https://doi.org/10.1016/j.apenergy.2015.11.067

Reddy, HK, Muppaneni, T, Ponnusamy, S, Sudasinghe, N, Pegallapati, A, Selvaratnam, T, Seger, M, Dungan, B, Nirmalakhandan, N, Schaub, T, Holguin, FO, Lammers, P, Voorhies, W & Deng, S 2016, 'Temperature effect on hydrothermal liquefaction of Nannochloropsis gaditana and Chlorella sp.', Applied Energy, vol. 165, pp. 943-951. https://doi.org/10.1016/j.apenergy.2015.11.067

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abstract = "Temperature effect on hydrothermal liquefaction (HTL) of Nannochloropsis gaditana and Chlorella sp. was investigated with 10% biomass loading at HTL temperatures of 180-330°C, and reaction time of 30 min. Maximum yields of 47.5% for Nannochloropsis sp. and 32.5% biocrude oil yields for Chlorella sp. were obtained at 300°C. The higher heating values of biocrude oils produced in this work ranged between 34 and 39 MJ/kg. 79% of energy in the Nannochloropsis sp. was recovered at 300°C and 62% of energy recovery from Chlorella sp. was achieved at 200°C. Valuable nutrients (NH3-N and PO43-) produced during the HTL process were quantified from the aqueous phase for both strains of biomass. The aqueous phase samples obtained at all temperatures were also analyzed for amino acids and carbohydrates. The suitable temperatures for extraction of lipids, amino acids and carbohydrates have been identified. Sequential HTL experiments conducted have shown the prospect of recovering nutrients and other valuable byproducts along with biocrude oil. The experimental results and analysis indicate that sustainable biofuel production requires the development of strain based strategies for the hydrothermal liquefaction process.",

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AU - Reddy, Harvind Kumar

AU - Muppaneni, Tapaswy

AU - Ponnusamy, Sundaravadivelnathan

AU - Sudasinghe, Nilusha

AU - Pegallapati, Ambica

AU - Selvaratnam, Thinesh

AU - Seger, Mark

AU - Dungan, Barry

AU - Nirmalakhandan, Nagamany

AU - Schaub, Tanner

AU - Holguin, F. Omar

AU - Lammers, Peter

AU - Voorhies, Wayne

AU - Deng, Shuguang

PY - 2016/3/1

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N2 - Temperature effect on hydrothermal liquefaction (HTL) of Nannochloropsis gaditana and Chlorella sp. was investigated with 10% biomass loading at HTL temperatures of 180-330°C, and reaction time of 30 min. Maximum yields of 47.5% for Nannochloropsis sp. and 32.5% biocrude oil yields for Chlorella sp. were obtained at 300°C. The higher heating values of biocrude oils produced in this work ranged between 34 and 39 MJ/kg. 79% of energy in the Nannochloropsis sp. was recovered at 300°C and 62% of energy recovery from Chlorella sp. was achieved at 200°C. Valuable nutrients (NH3-N and PO43-) produced during the HTL process were quantified from the aqueous phase for both strains of biomass. The aqueous phase samples obtained at all temperatures were also analyzed for amino acids and carbohydrates. The suitable temperatures for extraction of lipids, amino acids and carbohydrates have been identified. Sequential HTL experiments conducted have shown the prospect of recovering nutrients and other valuable byproducts along with biocrude oil. The experimental results and analysis indicate that sustainable biofuel production requires the development of strain based strategies for the hydrothermal liquefaction process.

AB - Temperature effect on hydrothermal liquefaction (HTL) of Nannochloropsis gaditana and Chlorella sp. was investigated with 10% biomass loading at HTL temperatures of 180-330°C, and reaction time of 30 min. Maximum yields of 47.5% for Nannochloropsis sp. and 32.5% biocrude oil yields for Chlorella sp. were obtained at 300°C. The higher heating values of biocrude oils produced in this work ranged between 34 and 39 MJ/kg. 79% of energy in the Nannochloropsis sp. was recovered at 300°C and 62% of energy recovery from Chlorella sp. was achieved at 200°C. Valuable nutrients (NH3-N and PO43-) produced during the HTL process were quantified from the aqueous phase for both strains of biomass. The aqueous phase samples obtained at all temperatures were also analyzed for amino acids and carbohydrates. The suitable temperatures for extraction of lipids, amino acids and carbohydrates have been identified. Sequential HTL experiments conducted have shown the prospect of recovering nutrients and other valuable byproducts along with biocrude oil. The experimental results and analysis indicate that sustainable biofuel production requires the development of strain based strategies for the hydrothermal liquefaction process.

KW - By-products

KW - Energy recovery

KW - Hydrothermal liquefaction

KW - Nutrients

KW - Sequential extraction and liquefaction

KW - Wet algae

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ER -

Temperature effect on hydrothermal liquefaction of Nannochloropsis gaditana and Chlorella sp.

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Keywords

ASJC Scopus subject areas

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