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Valorization of Bio-Briquette Fuel by Using Spent Coffee Ground as an External Additive

Author

Listed:
  • Anna Brunerová

    (Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic)

  • Hynek Roubík

    (Department of Sustainable Technologies, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic)

  • Milan Brožek

    (Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic)

  • Agus Haryanto

    (Department of Agriculture Engineering, Faculty of Agriculture, University of Lampung, Jl. Sumantri Brojonegoro 1, Bandar Lampung 35145, Republic of Indonesia)

  • Udin Hasanudin

    (Department of Agro-industrial Technology, Faculty of Agriculture, University of Lampung, Jl. Sumantri Brojonegoro 1, Bandar Lampung 35145, Republic of Indonesia)

  • Dewi Agustina Iryani

    (Department of Chemical Engineering, Engineering Faculty, University of Lampung, Jl. Sumantri Brojonegoro 1, Bandar Lampung 35145, Republic of Indonesia)

  • David Herák

    (Department of Mechanical Engineering, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic)

Abstract

The present study investigates the quality changes of wood bio-briquette fuel after the addition of spent coffee ground (SCG) into the initial feedstock materials (sawdust, shavings) in different mass ratios (1:1, 1:3). Analysis of SCGs fuel parameter proved great potential for energy generation by a process of direct combustion. Namely, level of calorific value ( GCV = 21.58 MJ∙kg −1 ), of ash content ( Ac = 1.49%) and elementary composition ( C = 55.49%, H = 7.07%, N = 2.38%, O = 33.41%) supports such statement. A comparison with results of initial feedstock materials exhibited better results of SCG in case of its calorific value and elementary composition. Bulk density ρ (kg·m −3 ) and mechanical durability DU (%) of bio-briquette samples from initial feedstock materials were following for sawdust: ρ = 1026.39 kg·m −3 , DU = 98.44% and shavings: ρ = 1036.53 kg·m −3 , DU = 96.70%. The level of such mechanical quality indicators changed after the addition of SCG. Specifically, SCG+sawdust mixtures achieved ρ = 1077.49 kg·m −3 and DU = 90.09%, while SCG + shavings mixtures achieved ρ = 899.44 kg·m −3 and DU = 46.50%. The addition of SCG increased wood bio-briquettes energy potential but decreased its mechanical quality. Consequently, the addition of SCG in wood bio-briquette has advantages, but its mass ratio plays an important key role.

Suggested Citation

  • Anna Brunerová & Hynek Roubík & Milan Brožek & Agus Haryanto & Udin Hasanudin & Dewi Agustina Iryani & David Herák, 2019. "Valorization of Bio-Briquette Fuel by Using Spent Coffee Ground as an External Additive," Energies, MDPI, vol. 13(1), pages 1-15, December.
  • Handle: RePEc:gam:jeners:v:13:y:2019:i:1:p:54-:d:300341
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    References listed on IDEAS

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    1. Kang, Sae Byul & Oh, Hong Young & Kim, Jong Jin & Choi, Kyu Sung, 2017. "Characteristics of spent coffee ground as a fuel and combustion test in a small boiler (6.5 kW)," Renewable Energy, Elsevier, vol. 113(C), pages 1208-1214.
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    Cited by:

    1. Lorenzo Bartolucci & Stefano Cordiner & Emanuele De Maina & Vincenzo Mulone, 2022. "Data-Driven Optimal Design of a CHP Plant for a Hospital Building: Highlights on the Role of Biogas and Energy Storages on the Performance," Energies, MDPI, vol. 15(3), pages 1-18, January.

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