Optimization of binder addition and particle size for densification of coffee husks briquettes using response surface methodology

3rd International Conference on Chemical Engineering Sciences and Applications 2017

Raudah^1 ; Zulkifli, Z.^1

Department of Chemical Engineering, Lhokseumawe State Polytechnic, Buketrata

24301, Indonesia^1

关键词: Biomass fuels;    Box-Behnken experimental design;    Input parameter;    Optimum conditions;    Pyrolysis time;    Research focus;    Response surface methodology;    Starch concentration;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/334/1/012007/pdf
DOI  :  10.1088/1757-899X/334/1/012007

来源: IOP

【 摘 要 】

The present research focuses on establishing the optimum conditions in converting coffee husk into a densified biomass fuel using starch as a binding agent. A Response Surface Methodology (RSM) approach using Box-Behnken experimental design with three levels (-1, 0, and +1) was employed to obtain the optimum level for each parameter. The briquettes wereproduced by compressing the mixture of coffee husk-starch in a piston and die assembly with the pressure of 2000 psi. Furthermore, starch percentage, pyrolysis time, and particle size were the input parameters for the algorithm. Bomb calorimeter was used to determine the heating value (HHV) of the solid fuel. The result of the study indicated that a combination of 34.71 mesh particle size, 110.93 min pyrolysis time, and 8% starch concentration werethe optimum variables.The HHV and density of the fuel were up to 5644.66 calgr-1and 0.7069 grcm-3,respectively. The study showed that further research should be conducted to improve the briquette density therefore the coffee husk could be convert into commercialsolid fuel to replace the dependent on fossil fuel.