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Spent coffee grounds compaction process: Its effects on the strength properties of biofuel pellets

Author

Listed:
  • Lisowski, Aleksander
  • Olendzki, Dariusz
  • Świętochowski, Adam
  • Dąbrowska, Magdalena
  • Mieszkalski, Leszek
  • Ostrowska-Ligęza, Ewa
  • Stasiak, Mateusz
  • Klonowski, Jacek
  • Piątek, Michał

Abstract

An experiment using spent coffee grounds (SCGs) was performed with moisture (6.2, 22.5, 23.2, and 33.4% w.b.) and die height (42, 52, 62, 72, 82, and 92 mm) as influencing parameters at a stable temperature of 93 °C and speed of 100 mm min−1, and the monitoring curves of pressure-displacements were studied. Both pelletization factors were significant parameters for the maximum pressure and corresponding piston displacements, pellet movement, specific work, pellet density, and breaking strength. An interaction was found between these factors, but the moisture had a greater and nonlinear effect on the agglomeration parameters than the die height, which influenced linearly the change of these parameters. The agglomeration parameters values increased with decreasing moisture and increasing the die height. The results suggest that high-strength fuel pellets (>1.0 MPa) could be produced from SCG at a suitable moisture (<20% w.b.) and die height (60–70 mm). A regressive model linking compressive stress with the fuel pellets' density and the maximum pressure was developed, which revealed that pressure had a greater influence on the pellet's compressive strength than the pellet density did. A novelty of this work was the application of an adjustable orifice length of the die in which the SCGs were compacted.

Suggested Citation

  • Lisowski, Aleksander & Olendzki, Dariusz & Świętochowski, Adam & Dąbrowska, Magdalena & Mieszkalski, Leszek & Ostrowska-Ligęza, Ewa & Stasiak, Mateusz & Klonowski, Jacek & Piątek, Michał, 2019. "Spent coffee grounds compaction process: Its effects on the strength properties of biofuel pellets," Renewable Energy, Elsevier, vol. 142(C), pages 173-183.
    • Handle: RePEc:eee:renene:v:142:y:2019:i:c:p:173-183
    DOI: 10.1016/j.renene.2019.04.114
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    Citations

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    Cited by:

    1. Radovan Nosek & Maw Maw Tun & Dagmar Juchelkova, 2020. "Energy Utilization of Spent Coffee Grounds in the Form of Pellets," Energies, MDPI, vol. 13(5), pages 1-8, March.
    2. Czekała, Wojciech & Łukomska, Aleksandra & Pulka, Jakub & Bojarski, Wiktor & Pochwatka, Patrycja & Kowalczyk-Juśko, Alina & Oniszczuk, Anna & Dach, Jacek, 2023. "Waste-to-energy: Biogas potential of waste from coffee production and consumption," Energy, Elsevier, vol. 276(C).
    3. Marcin Jewiarz & Krzysztof Mudryk & Marek Wróbel & Jarosław Frączek & Krzysztof Dziedzic, 2020. "Parameters Affecting RDF-Based Pellet Quality," Energies, MDPI, vol. 13(4), pages 1-17, February.
    4. Duk-Gam Woo & Sang Hyeon Kim & Tae Han Kim, 2021. "Solid Fuel Characteristics of Pellets Comprising Spent Coffee Grounds and Wood Powder," Energies, MDPI, vol. 14(2), pages 1-17, January.
    5. Aleksandra Minajeva & Algirdas Jasinskas & Rolandas Domeika & Edvardas Vaiciukevičius & Egidijus Lemanas & Stanisław Bielski, 2021. "The Study of the Faba Bean Waste and Potato Peels Recycling for Pellet Production and Usage for Energy Conversion," Energies, MDPI, vol. 14(10), pages 1-14, May.
    6. Mendoza Martinez, Clara Lisseth & Saari, Jussi & Melo, Yara & Cardoso, Marcelo & de Almeida, Gustavo Matheus & Vakkilainen, Esa, 2021. "Evaluation of thermochemical routes for the valorization of solid coffee residues to produce biofuels: A Brazilian case," Renewable and Sustainable Energy Reviews, Elsevier, vol. 137(C).
    7. Zhang, Congyu & Chen, Wei-Hsin & Ho, Shih-Hsin & Park, Young-Kwon & Wang, Chengyu & Zhang, Ying, 2023. "Pelletization property analysis of raw and torrefied corn stalks for industrial application to achieve agricultural waste conversion," Energy, Elsevier, vol. 285(C).
    8. Yılmaz, Hasan & Çanakcı, Murad & Topakcı, Mehmet & Karayel, Davut & Yiğit, Mete & Ortaçeşme, Derya, 2023. "In-situ pelletization of campus biomass residues: Case study for Akdeniz University," Renewable Energy, Elsevier, vol. 212(C), pages 972-983.
    9. Eleonora Bottani & Letizia Tebaldi & Andrea Volpi, 2019. "The Role of ICT in Supporting Spent Coffee Grounds Collection and Valorization: A Quantitative Assessment," Sustainability, MDPI, vol. 11(23), pages 1-44, November.
    10. Lachman, Jakub & Lisý, Martin & Baláš, Marek & Matúš, Miloš & Lisá, Hana & Milčák, Pavel, 2022. "Spent coffee grounds and wood co-firing: Fuel preparation, properties, thermal decomposition, and emissions," Renewable Energy, Elsevier, vol. 193(C), pages 464-474.

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