IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v256y2026ipcs0960148125018269.html

Co-hydrothermal carbonization of food wastes and lignocellulose-derived kitchen wastes: Product characteristics, synergistic mechanism and pyrolysis kinetics of hydrochars

Author

Listed:
  • Wei, Xiao
  • Ma, Zenghui
  • Wang, Tengfei
  • Jin, Shiguang
  • Li, Yinxue
  • Wang, Yongkang
  • Yu, Yanling

Abstract

This work investigated the physicochemical properties of bio-oil and hydrochars obtained from co-hydrothermal carbonization (co-HTC) of food wastes (FW) and lignocellulose-derived kitchen wastes (LKW), and based on thermogravimetric (TG) data, the pyrolysis behavior of hydrochars was evaluated by kinetic. The results showed that co-HTC promoted the intermolecular polymerization reaction, resulting in the increase of the content of aromatic compounds and other long-chain macromolecular compounds in bio-oil. The co-HTC of FW and LKW was conducive to the formation of microcrystalline structures and increase in aromaticity of hydrochars. The higher LKW ratio promoted the ring-opening reaction of hemicellulose, cellulose and lignin, and then increased the relative content of -OH and C-O-C in hydrochars. And the synergistic mechanism and reaction path of co-HTC were speculated. TG results showed that higher LKW ratio promoted the condensation and carbonization reaction between raw materials, thus increasing the stability of hydrochars. The activation energy of hydrochars calculated by Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS) gradually increased from 187.54 and 190.10 kJ/mol in FLHC-1:0 to 221.82 and 227.04 kJ/mol in FLHC-0:1, respectively. With the increase of conversion rate (x), the activation energy of hydrochars increased first and then decreased, and the activation energy reached the maximum value at x = 0.7.

Suggested Citation

  • Wei, Xiao & Ma, Zenghui & Wang, Tengfei & Jin, Shiguang & Li, Yinxue & Wang, Yongkang & Yu, Yanling, 2026. "Co-hydrothermal carbonization of food wastes and lignocellulose-derived kitchen wastes: Product characteristics, synergistic mechanism and pyrolysis kinetics of hydrochars," Renewable Energy, Elsevier, vol. 256(PC).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pc:s0960148125018269
    DOI: 10.1016/j.renene.2025.124162
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148125018269
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.renene.2025.124162?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to

    for a different version of it.

    More about this item

    Keywords

    ;
    ;
    ;
    ;
    ;

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:renene:v:256:y:2026:i:pc:s0960148125018269. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.