Perbaikan Kualitas Energi Biomassa Kayu Jati Menggunakan Torefaksi Microwave Untuk Produksi Bioarang

Abstract

[Title: Improvement of Teakwood Biomass Energy Quality Using Microwave Torrefaction For Biochar Production] This study focused on upgrading the waste teakwood through microwave torrefaction processes and investigating the critical operating parameters to improve energy density and energy efficiency for better feedstock in producing the quality of biochar fuel. The experiments were carried out in a 250 mL reactor placed in a microwave cavity on two different media, inert and non-inert. The microwave was operated at a frequency of 2.45GHz with power level variations of 540W, 720W, and 900W, respectively. During torrefaction processes, the nitrogen gas flows into the reactor at a rate of 0.125 mL/min, and the air medium (non-inert) is activated naturally. Observations were conducted on the temperature inside the reactor every 0.5 minutes for 20 minutes using a K-Type thermocouple. Changes in the mass and the properties of the torrefied products were observed and analyzed to predict the correlation between calorific value, mass and energy yield, and level power of the microwave. The results showed that with the increased operating power of microwave torrefaction, the calorific value and energy density of product material increased significantly. In contrast, the mass and energy yield tended to decrease. Air has great potential as a substitute media for the expensive nitrogen gas to perform the microwave torrefaction of waste teakwood biomass.