A comprehensive analysis of food waste derived liquefaction bio-oil properties for industrial application

Wei-Hsin Chen, Yu-Ying Lin, Hsuah-Cheng Liu, Teng-Chien Chen, Chun-Hung Hung, Chi-Hui Chen and Hwai Chyuan Ong

Applied Energy, 2019, vol. 237, issue C, 283-291

Abstract: Hydrothermal liquefaction is a promising technology to convert wet biomass into bio-oil with high calorific value and without drying process. To evaluate the potential application of liquefaction bio-oil in industry, the present study aims to provide a comprehensive analysis on the properties of liquefaction bio-oil derived from food waste. The food waste is pretreated with K2CO3 at 100 °C for 1 h, followed by liquefaction in a semi-pilot reactor at 320 °C for 30 min. The higher heating value of produced bio-oil is 34.79 MJ kg−1, accounting for 53% increase when compared to the feedstock (22.74 MJ kg−1). The ignition and burnout temperatures of the bio-oil are lower than other liquefaction bio-oils, reflecting its higher reactivity and combustibility. Meanwhile, the bio-oil has a higher oxidation onset temperature than pyrolysis bio-oils, showing its higher thermal stability. The independent parallel reaction model in association with the particle swarm optimization indicates that the pyrolysis kinetics of the bio-oil can be approximated by four groups. The component analysis further reveals two important groups of fatty acids and amides in the bio-oil, stemming from the conversion of carbohydrate and protein in the food waste. The comprehensive analysis shows that the liquefaction bio-oil from food waste, characterized by higher energy density and better combustibility, is a potential substitute to the fossil fuels.

Keywords: Liquefaction; Food waste; Bio-oil and biocrude; Combustion and pyrolysis; Kinetics; Independent parallel reaction model (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (12)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:237:y:2019:i:c:p:283-291

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DOI: 10.1016/j.apenergy.2018.12.084

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