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Hydrochar derived from green waste by microwave hydrothermal carbonization

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  • Shao, Yuchao
  • Long, Yuyang
  • Wang, Hengyi
  • Liu, Dongyun
  • Shen, Dongsheng
  • Chen, Ting

Abstract

Green waste (GW), rich in cellulose and hemicellulose, is a valuable resource. Developing alternative sustainable technologies to utilize GW is attracting increasing attention. In this study, microwave hydrothermal carbonization (MHTC) process parameters including holding temperature, holding time, and liquid-to-solid ratio were optimized by a response surface design to tailor the properties of hydrochar. The hydrochar characteristic was mainly evaluated by the calorific value. The results showed that the highest hydrochar calorific value (∼23.01 MJ kg−1) could be observed at a holding temperature of 190 °C, a holding time of 1 h and liquid-to-solid ratio of 8:1. Correspondingly, the hydrochar yield ranged from 50.40% to 76.80%. The economic evaluation of hydrochar was also done in this work. These results show that the GW-derived hydrochar warrants further investigations as a fuel source and as an adsorbent material.

Suggested Citation

  • Shao, Yuchao & Long, Yuyang & Wang, Hengyi & Liu, Dongyun & Shen, Dongsheng & Chen, Ting, 2019. "Hydrochar derived from green waste by microwave hydrothermal carbonization," Renewable Energy, Elsevier, vol. 135(C), pages 1327-1334.
    • Handle: RePEc:eee:renene:v:135:y:2019:i:c:p:1327-1334
    DOI: 10.1016/j.renene.2018.09.041
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    References listed on IDEAS

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    1. Kambo, Harpreet Singh & Dutta, Animesh, 2015. "A comparative review of biochar and hydrochar in terms of production, physico-chemical properties and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 45(C), pages 359-378.
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    1. Manal Hessien, 2022. "Microwave-Assisted Hydrothermal Carbonization of Pomegranate Peels into Hydrochar for Environmental Applications," Energies, MDPI, vol. 15(10), pages 1-13, May.
    2. Shao, Yuchao & Long, Yuyang & Zhou, Ying & Jin, Zhiyuan & Zhou, Dan & Shen, Dongsheng, 2019. "5-Hydroxymethylfurfural production from watermelon peel by microwave hydrothermal liquefaction," Energy, Elsevier, vol. 174(C), pages 198-205.
    3. René A. Garrido & Camila Lagos & Carolina Luna & Jaime Sánchez & Georgina Díaz, 2021. "Study of the Potential Uses of Hydrochar from Grape Pomace and Walnut Shells Generated from Hydrothermal Carbonization as an Alternative for the Revalorization of Agri-Waste in Chile," Sustainability, MDPI, vol. 13(22), pages 1-10, November.
    4. Wądrzyk, Mariusz & Korzeniowski, Łukasz & Plata, Marek & Janus, Rafał & Lewandowski, Marek & Michalik, Marek & Magdziarz, Aneta, 2023. "Pyrolysis of hydrochars obtained from blackcurrant pomace in single and binary solvent systems," Renewable Energy, Elsevier, vol. 214(C), pages 383-394.
    5. Wang, Jianfeng & Zhao, Zhiqiang & Zhang, Yaobin, 2021. "Enhancing anaerobic digestion of kitchen wastes with biochar: Link between different properties and critical mechanisms of promoting interspecies electron transfer," Renewable Energy, Elsevier, vol. 167(C), pages 791-799.
    6. Shrestha, Ankita & Acharya, Bishnu & Farooque, Aitazaz A., 2021. "Study of hydrochar and process water from hydrothermal carbonization of sea lettuce," Renewable Energy, Elsevier, vol. 163(C), pages 589-598.

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