Utilization of Coconut Shell and Coffee Grounds as Briquettes Using the Carbonization Method

Authors

  • Alfiana Adhitasari aDepartment of Chemical Engineering, Politeknik Negeri Bandung, Jalan Gegerkalong Hilir, Bandung, 40559, Indonesia
  • Rintis Manfaati Department of Chemical Engineering, Politeknik Negeri Bandung, Jalan Gegerkalong Hilir, Bandung, 40559, Indonesia
  • Tifa Paramitha Department of Chemical Engineering, Politeknik Negeri Bandung, Jalan Gegerkalong Hilir, Bandung, 40559, Indonesia
  • Keisya Adellia Zahwa Department of Chemical Engineering, Politeknik Negeri Bandung, Jalan Gegerkalong Hilir, Bandung, 40559, Indonesia
  • Kiranna Shalmadevy Setiawan Department of Chemical Engineering, Politeknik Negeri Bandung, Jalan Gegerkalong Hilir, Bandung, 40559, Indonesia
  • Yusmardhany Yusuf Department of Chemical Engineering, Faculty of Industrial Technology, Universitas Pembangunan Nasional Veteran Yogyakarta, Jl. Seturan Raya C No.405, 55281, Indonesia

DOI:

https://doi.org/10.31315/eksergi.v22i3.15128

Keywords:

biomass briquettes, coconut shell, coffee grounds, carbonization

Abstract

Biomass-based briquettes offer a renewable energy alternative that can help reduce CO₂ emissions. Coconut shells and coffee grounds are promising waste materials due to their high calorific value. This study aimed to optimize the composition and carbonization time in producing briquettes from these two materials. The briquettes were prepared following SNI 01-6235-2000 and export briquette standards. The process included drying, carbonization at 300 °C for 60, 90, 120, 150, and 180 minutes, sieving, mixing, molding, and drying. Coconut shells and coffee grounds were mixed at weight ratios of 9:1, 8:2, 7:3, 6:4, and 5:5 with a total of 46.5 grams and 8.5 grams of adhesive. Briquette quality was evaluated based on moisture content, ash content, volatile matter, density, calorific value, and fixed carbon. The 9:1 composition yielded the highest calorific value of 6,472 cal/g, while a carbonization time of 90 minutes produced the best calorific value of 6,504 cal/g. The results show that a high proportion of coconut shells with limited coffee grounds and optimal carbonization time can produce briquettes with high energy potential, suitable for use as an alternative fuel.

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Published

2025-11-23

How to Cite

Adhitasari, A., Manfaati, R., Paramitha, T., Zahwa, K. A., Setiawan, K. S., & Yusuf, Y. (2025). Utilization of Coconut Shell and Coffee Grounds as Briquettes Using the Carbonization Method. Eksergi, 22(3), 201–211. https://doi.org/10.31315/eksergi.v22i3.15128

Issue

Vol. 22 No. 3 (2025)

Section

Artikel

License

Copyright (c) 2025 Alfiana Adhitasari, Rintis Manfaati, Tifa Paramitha, Keisya Adellia Zahwa, Kiranna Shalmadevy Setiawan, Yusmardhany Yusuf

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