Authors:
Musabbikhah
1
and
Samsul Bakri
2
Affiliations:
1
Mechanical Engineering Department, Akademi Teknologi Warga Surakarta, Indonesia
;
2
Accounting Department, Universitas Widya Mataram Jogjakarta, Indonesia
Keyword(s):
Optimization, Pyrolysis, calorific value, sawdust charcoal, model, briquettes.
Abstract:
This study aims to optimize the pyrolysis process and build calorific value model of sawdust charcoal as
composing materials of quality briquettes to fulfill the need of renewable fuels. The results showed that the
calorific value of sawdust increased by 2344 Cal/g after pyrolysis. The optimum conditions of calorific value
were achieved at drying temperature parameters of 60°C, pyrolysis temperature of 600°C, holding time of
120 minutes, and particle size of 100 mesh. The linearity test results between the value of R, R Square, and
Adjusted R Square of the calorific value showed there is a strong correlation between drying temperature,
pyrolysis temperature, holding time, and particle size. Based on validation test, the calorific value model
showed that the residual normality distribution (P-value) was > 0.05 which did not form a certain pattern
on the assumption of homoscedasticity, no multicollinearity (TOL > 1; VIF < 10) and the DW value was
between the specified range. The model
was declared valid. Based on the feasibility test model, P-value was
(0.000) < a (0.05). This means the model of proper calorific value was reliable to be used to predict the
sawdust charcoal calorific value.
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