期刊
ENERGY
卷 199, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2020.117438
关键词
Alkaline pretreatment; Hydrothermal liquefaction (HTL); Double analysis; Taguchi method; Analysis of variance (ANOVA); Bio-oil and energy yields
资金
- Metal Industries Research & Development Centre
- Ministry of Science and Technology, Taiwan, R.O.C. [MOST 106-2923-E-006-002-MY3, 109-3116-F-006-016-CC1]
Bio-oil production from food waste, consisting of pineapple peel, banana peel, and watermelon peel, is investigated by a two-step process, namely, an alkaline pretreatment process with K2CO3 (10 wt% of the dry feedstock) followed by a hydrothermal liquefaction (HTL) process. Meanwhile, the Taguchi method is introduced to maximize the energy yield of the two-step process. Four parameters in the Taguchi approach are taken into account; they are the pretreatment temperature and time as well as the liquefaction temperature and holding time. The optimal combination of the four parameters gives the highest energy yield of 56.55%. The higher heating value of the bio-oil is 25.12 MJ/kg, yielding a 45.88% improvement when compared to the HHV of the dry-basis feedstock. A double analysis, namely, the Taguchi approach and analysis of variance (ANOVA), suggests that the liquefaction temperature plays the most influential role in the energy yield, and a strong linear relationship (R-2 approximate to 0.99) is exhibited be- tween the effect in the Taguchi approach and the F value in ANOVA. The experiments of thermogravimetric analysis coupled with Fourier-transform infrared spectroscopy indicate that the composition of the bio-oil from the optimal operation is more uniform. (C) 2020 Elsevier Ltd. All rights reserved.
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