<![CDATA[Testing of the characteristics and exhaust emissions aims to determine the type of wood that is good for use as an alternative fuel in the future. Based on the description, a laboratory scale tool that is able to provide information on the characteristics and exhaust emissions of biomass is needed, which can also be used as a practical tool so that students are able to understand and know the use of good biomass fuel. Furnaces use refractory cement material for combustion chambers coated with fire bricks, and steel plate casings as insulators. The combustion chamber has a volume of 8,000 m3. The furnace is equipped with additional fan components at the front door to help drain air during direct combustion and gas analyzer sensors to get exhaust gas emissions data installed in the air outlet. The furnace that is made is able to reach a temperature of 800 oC within 360 minutes. The heat transfer rate on the furnace wall reaches 6837.6 W. Mahogany biomass samples have been successfully carried out. The test results using the tools made obtained information on water content of 12.24%, the content of flying substances 83.5%, ash content of 0.57%, and carbon content bound to 15.93%, with the results of exhaust emissions CO = 47.50 ppm , SO2 = 0.11 ppm, and NOx = 0.76 ppm.]]>
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