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Effects of Pyrolysis Temperature and Retention Time on Fuel Characteristics of Food Waste Feedstuff and Compost for Co-Firing in Coal Power Plants

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  • Ye-Eun Lee

    (Division of Environment and Plant Engineering, Korea Institute of Civil Engineering and Building Technology 283, Goyang-daero, Ilsanseo-gu Goyang-si, Gyeonggi-do 10223, Korea
    Department of Construction Environmental Engineering, University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea)

  • Dong-Chul Shin

    (Division of Environment and Plant Engineering, Korea Institute of Civil Engineering and Building Technology 283, Goyang-daero, Ilsanseo-gu Goyang-si, Gyeonggi-do 10223, Korea)

  • Yoonah Jeong

    (Division of Environment and Plant Engineering, Korea Institute of Civil Engineering and Building Technology 283, Goyang-daero, Ilsanseo-gu Goyang-si, Gyeonggi-do 10223, Korea)

  • I-Tae Kim

    (Division of Environment and Plant Engineering, Korea Institute of Civil Engineering and Building Technology 283, Goyang-daero, Ilsanseo-gu Goyang-si, Gyeonggi-do 10223, Korea)

  • Yeong-Seok Yoo

    (Division of Environment and Plant Engineering, Korea Institute of Civil Engineering and Building Technology 283, Goyang-daero, Ilsanseo-gu Goyang-si, Gyeonggi-do 10223, Korea)

Abstract

Food waste is an underutilized organic resource given its abundance and high potential energy. The purpose of this study was to confirm the suitability of pyrolyzed food waste as a co-firing fuel by adjusting the pyrolysis temperature (300–500 °C) and retention time (15–60 min). Both high moisture (compost) and low moisture (feedstuff) food waste were examined. Increasing the temperature and retention time yielded more volatile H and O as well as C sequestration, resulting in reduced H/C and O/C ratios. Notably, the van Krevelen diagram increased in similarity to that of coal. Upon pyrolyzing food waste compost, more than half of the chloride was volatilized, the highest carbon content of the compost and feedstuff were 61.35% and 54.12%, respectively, after pyrolysis at 400 °C for 60 min; however, the calorific value of the pyrolyzed feedstuff was reduced owing to the high salt concentration. The pyrolyzed compost and feedstuff had high Ca contents, which contributed to an increased ash fusion temperature. Therefore, food waste byproducts are advantageous as co-firing fuels in terms of energy regeneration. Nevertheless, further research is required regarding the removal of salt and alkali earth metal ion materials.

Suggested Citation

  • Ye-Eun Lee & Dong-Chul Shin & Yoonah Jeong & I-Tae Kim & Yeong-Seok Yoo, 2019. "Effects of Pyrolysis Temperature and Retention Time on Fuel Characteristics of Food Waste Feedstuff and Compost for Co-Firing in Coal Power Plants," Energies, MDPI, vol. 12(23), pages 1-14, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:23:p:4538-:d:291954
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    References listed on IDEAS

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    Cited by:

    1. Adrian Knapczyk & Sławomir Francik & Marcin Jewiarz & Agnieszka Zawiślak & Renata Francik, 2020. "Thermal Treatment of Biomass: A Bibliometric Analysis—The Torrefaction Case," Energies, MDPI, vol. 14(1), pages 1-31, December.
    2. Yoonah Jeong & Ye-Eun Lee & I-Tae Kim, 2020. "Characterization of Sewage Sludge and Food Waste-Based Biochar for Co-Firing in a Coal-Fired Power Plant: A Case Study in Korea," Sustainability, MDPI, vol. 12(22), pages 1-12, November.
    3. Anastasia Islamova & Svetlana Kropotova & Pavel Strizhak, 2022. "Research into Energy Production from the Combustion of Waste-Derived Composite Fuels," Energies, MDPI, vol. 15(15), pages 1-4, August.

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