Abstract
Hydrothermal liquefaction (HTL) can directly convert kitchen waste (KW) to bio-oil without pre-drying. This study investigated the effect of operating temperatures (240–280 °C), solvent (ethanol, water and ethanol-water co-solvent) on bio-oil production during HTL of KW. The bio-oil was characterized, including composition, boiling point and viscosity. By comparison, higher reaction temperature and ethanol concentration in co-solvent could effectively increase the yield and quality of bio-oil, which implies the promotion of liquefaction efficiency. The highest bio-oil yield of 47.59%, conversion ratio of 72.65%, and high heating value (HHV) of 31.93 MJ/kg were obtained at the ethanol concentration of 62.5% in co-solvent and reaction temperature of 260 °C. Compared to the hydrothermal liquefaction of KW in water, the reaction in ethanol-water co-solvent produced higher energy yield. Moreover, the addition of ethanol in co-solvent could increase the concentration of ester compounds and reduce the viscosity of bio-oil.
| Original language | English |
|---|---|
| Article number | 118949 |
| Journal | Renewable Energy |
| Volume | 215 |
| DOIs | |
| State | Published - Oct 2023 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2023 Elsevier Ltd
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
Keywords
- Bio-oil
- Co-solvent
- Hydrothermal liquefaction
- Kitchen waste
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
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