IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v17y2024i24p6446-d1549206.html
   My bibliography  Save this article

High-Energy-Density Hydrochar and Bio-Oil from Hydrothermal Processing of Spent Coffee Grounds—Experimental Investigation

Author

Listed:
  • Mariusz Wądrzyk

    (Faculty of Energy and Fuels, AGH University of Krakow, 30-059 Kraków, Poland)

  • Jakub Katerla

    (Faculty of Energy and Fuels, AGH University of Krakow, 30-059 Kraków, Poland)

  • Rafał Janus

    (Faculty of Energy and Fuels, AGH University of Krakow, 30-059 Kraków, Poland)

  • Marek Lewandowski

    (Faculty of Energy and Fuels, AGH University of Krakow, 30-059 Kraków, Poland)

  • Marek Plata

    (Faculty of Energy and Fuels, AGH University of Krakow, 30-059 Kraków, Poland)

  • Łukasz Korzeniowski

    (Faculty of Energy and Fuels, AGH University of Krakow, 30-059 Kraków, Poland)

Abstract

Spent coffee grounds (SCGs), a by-product of coffee brewing, have high application potential. However, their high moisture content complicates conventional conversion without energy-intensive drying. This study explores a new route to convert SCGs to high-carbon bioproducts, such as hydrochar and bio-oil, through hydrothermal processing. The effect of the processing variables, i.e., temperature, residence time, and the application of the binary solvent as a reaction medium, on the distribution of the resultant bioproducts was investigated. The quality of the fabricated bioproducts was analyzed by means of instrumental techniques such as EA, ATR-FTIR, GC-MS, and GC-TCD-FID. Two dominant fractions were liquid bio-oil and solid hydrochar. The highest char yield (39 wt.%) was observed under milder conditions (low T and short residence times), while more severe conditions led to an increase in bio-oil formation, which reached a maximum of 46 wt.%. The resulting bio-oils were of similar quality, presenting high carbon content (71–74 wt.%) and energetic values (approximately 35 MJ/kg). Also, hydrochars showed a noticeable energy densification compared to raw materials, where the C content and HHV reached up to 73.8 wt.% and 30 MJ/kg, respectively. The addition of co-solvent to water improves the bio-oil yield as a result of the enhanced stabilization of reactive intermediates.

Suggested Citation

  • Mariusz Wądrzyk & Jakub Katerla & Rafał Janus & Marek Lewandowski & Marek Plata & Łukasz Korzeniowski, 2024. "High-Energy-Density Hydrochar and Bio-Oil from Hydrothermal Processing of Spent Coffee Grounds—Experimental Investigation," Energies, MDPI, vol. 17(24), pages 1-18, December.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:24:p:6446-:d:1549206
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/17/24/6446/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/17/24/6446/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Peng, Nana & Liu, Zhengang & Liu, Tingting & Gai, Chao, 2016. "Emissions of polycyclic aromatic hydrocarbons (PAHs) during hydrothermally treated municipal solid waste combustion for energy generation," Applied Energy, Elsevier, vol. 184(C), pages 396-403.
    2. Lozano, E.M. & Pedersen, T.H. & Rosendahl, L.A., 2020. "Integration of hydrothermal liquefaction and carbon capture and storage for the production of advanced liquid biofuels with negative CO2 emissions," Applied Energy, Elsevier, vol. 279(C).
    3. Toor, Saqib Sohail & Rosendahl, Lasse & Rudolf, Andreas, 2011. "Hydrothermal liquefaction of biomass: A review of subcritical water technologies," Energy, Elsevier, vol. 36(5), pages 2328-2342.
    4. Gollakota, A.R.K. & Kishore, Nanda & Gu, Sai, 2018. "A review on hydrothermal liquefaction of biomass," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 1378-1392.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Genel, Salih & Durak, Halil & Durak, Emre Demirer & Güneş, Hasret & Genel, Yaşar, 2023. "Hydrothermal liquefaction of biomass with molybdenum, aluminum, cobalt metal powder catalysts and evaluation of wastewater by fungus cultivation," Renewable Energy, Elsevier, vol. 203(C), pages 20-32.
    2. Kumar, R. & Strezov, V., 2021. "Thermochemical production of bio-oil: A review of downstream processing technologies for bio-oil upgrading, production of hydrogen and high value-added products," Renewable and Sustainable Energy Reviews, Elsevier, vol. 135(C).
    3. Tahir H. Seehar & Saqib S. Toor & Ayaz A. Shah & Thomas H. Pedersen & Lasse A. Rosendahl, 2020. "Biocrude Production from Wheat Straw at Sub and Supercritical Hydrothermal Liquefaction," Energies, MDPI, vol. 13(12), pages 1-18, June.
    4. Sapillado, Gilda & Zhang, Yuanhui & Summers, Sabrina & Ribeiro, Rogers & Tommaso, Giovana, 2024. "Energy recovery of residual yeast via hydrothermal liquefaction with multi-cycle reuse of the post-HTL wastewater and subsequent anaerobic digestion," Renewable Energy, Elsevier, vol. 236(C).
    5. Liu, Quan & Zhang, Guanyu & Liu, Mingyang & Kong, Ge & Xu, Ruolan & Han, Lujia & Zhang, Xuesong, 2022. "Fast hydrothermal liquefaction coupled with homogeneous catalysts to valorize livestock manure for enhanced biocrude oil and hydrochar production," Renewable Energy, Elsevier, vol. 198(C), pages 521-533.
    6. Savvas L. Douvartzides & Nikolaos D. Charisiou & Kyriakos N. Papageridis & Maria A. Goula, 2019. "Green Diesel: Biomass Feedstocks, Production Technologies, Catalytic Research, Fuel Properties and Performance in Compression Ignition Internal Combustion Engines," Energies, MDPI, vol. 12(5), pages 1-41, February.
    7. Munir, M. Tajammal & Mansouri, Seyed Soheil & Udugama, Isuru A. & Baroutian, Saeid & Gernaey, Krist V. & Young, Brent R., 2018. "Resource recovery from organic solid waste using hydrothermal processing: Opportunities and challenges," Renewable and Sustainable Energy Reviews, Elsevier, vol. 96(C), pages 64-75.
    8. Mei Yin Ong & Saifuddin Nomanbhay, 2022. "Optimization Study on Microwave-Assisted Hydrothermal Liquefaction of Malaysian Macroalgae Chaetomorpha sp. for Phenolic-Rich Bio-Oil Production," Energies, MDPI, vol. 15(11), pages 1-22, May.
    9. Yingxian Wang & Maojiong Cao & Weijuan Lan & Dongxue Yin, 2024. "Thermal and Oxidative Stability of Biocrude Oil Derived from the Continuous Hydrothermal Liquefaction of Spirulina," Sustainability, MDPI, vol. 16(12), pages 1-14, June.
    10. Yang, Jie & (Sophia) He, Quan & Yang, Linxi, 2019. "A review on hydrothermal co-liquefaction of biomass," Applied Energy, Elsevier, vol. 250(C), pages 926-945.
    11. Marco Balsamo & Francesca Di Lauro & Maria Laura Alfieri & Paola Manini & Piero Salatino & Fabio Montagnaro & Roberto Solimene, 2024. "Unravelling the Role of Biochemical Compounds within the Hydrothermal Liquefaction Process of Real Sludge Mixtures," Sustainability, MDPI, vol. 16(5), pages 1-18, February.
    12. Wądrzyk, Mariusz & Grzywacz, Przemysław & Janus, Rafał & Michalik, Marek, 2021. "A two-stage processing of cherry pomace via hydrothermal treatment followed by biochar gasification," Renewable Energy, Elsevier, vol. 179(C), pages 248-261.
    13. Kamaldeep Sharma & Ayaz A. Shah & Saqib S. Toor & Tahir H. Seehar & Thomas H. Pedersen & Lasse A. Rosendahl, 2021. "Co-Hydrothermal Liquefaction of Lignocellulosic Biomass in Supercritical Water," Energies, MDPI, vol. 14(6), pages 1-13, March.
    14. Kandasamy, Sabariswaran & Zhang, Bo & He, Zhixia & Chen, Haitao & Feng, Huan & Wang, Qian & Wang, Bin & Ashokkumar, Veeramuthu & Siva, Subramanian & Bhuvanendran, Narayanamoorthy & Krishnamoorthi, M., 2020. "Effect of low-temperature catalytic hydrothermal liquefaction of Spirulina platensis," Energy, Elsevier, vol. 190(C).
    15. Masoumi, Shima & Boahene, Philip E. & Dalai, Ajay K., 2021. "Biocrude oil and hydrochar production and characterization obtained from hydrothermal liquefaction of microalgae in methanol-water system," Energy, Elsevier, vol. 217(C).
    16. Shahbeik, Hossein & Kazemi Shariat Panahi, Hamed & Dehhaghi, Mona & Guillemin, Gilles J. & Fallahi, Alireza & Hosseinzadeh-Bandbafha, Homa & Amiri, Hamid & Rehan, Mohammad & Raikwar, Deepak & Latine, , 2024. "Biomass to biofuels using hydrothermal liquefaction: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 189(PB).
    17. Song, Bing & Lin, Richen & Lam, Chun Ho & Wu, Hao & Tsui, To-Hung & Yu, Yun, 2021. "Recent advances and challenges of inter-disciplinary biomass valorization by integrating hydrothermal and biological techniques," Renewable and Sustainable Energy Reviews, Elsevier, vol. 135(C).
    18. Ong, Hwai Chyuan & Chen, Wei-Hsin & Farooq, Abid & Gan, Yong Yang & Lee, Keat Teong & Ashokkumar, Veeramuthu, 2019. "Catalytic thermochemical conversion of biomass for biofuel production: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 113(C), pages 1-1.
    19. Makoto M. Watanabe & Andreas Isdepsky, 2021. "Biocrude Oil Production by Integrating Microalgae Polyculture and Wastewater Treatment: Novel Proposal on the Use of Deep Water-Depth Polyculture of Mixotrophic Microalgae," Energies, MDPI, vol. 14(21), pages 1-29, October.
    20. Daniele Castello & Thomas Helmer Pedersen & Lasse Aistrup Rosendahl, 2018. "Continuous Hydrothermal Liquefaction of Biomass: A Critical Review," Energies, MDPI, vol. 11(11), pages 1-35, November.

    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:gam:jeners:v:17:y:2024:i:24:p:6446-:d:1549206. 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.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with 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: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    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.