Brunerová, anna and Roubik, Hynex and Haryanto, Agus and Hasanudin, Udin and Iryani, Dewi Agustina and Herak, David (2019) Valorization of Bio-Briquette Fuel by Using Spent Coffee Ground as an External Additive. Energies, 13 (1). pp. 1-15. ISSN 1996-1073


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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.

Item Type: Article
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Fakultas Teknik (FT) > Prodi Teknik Kimia
Depositing User: Dr. Eng Dewi Agustina Iryani
Date Deposited: 02 Jun 2020 13:51
Last Modified: 02 Jun 2020 13:51

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