Abstract
AbstractRefuse derived fuel (RDF) is waste that can’t be reprocessed. One way to use RDF is to convert it to alternative fuels. A gasification is a tool that can be used to convert RDF into syngas (gas fuel) so that it can be used for internal combustion engines and power plans. This research was conducted using a downdraft gasifier with a three-stage gasifying agent with variations in the air ratio (AR) at the air intake in the pyrolysis, oxidation, and reduction zones (0:10:0, 2:6:2, 1:6:3, 3:6:1, 2:5:3, 3:5:2, 1:8:1, 2:7:1, and 1:7:2), besides that the temperature control system in the oxidation zone is varied from 600 ℃, 700 ℃, 800 ℃, 900 ℃, to 1000 ℃. Parameters in the gasification process were measured such as combustible syngas composition, LHV syngas, and tar content. The results obtained using AR 1:7:2 and setting 1000 ℃ are the most optimal results, where the highest combustible syngas such as CO is 2.67 %vol and H2 is 11.54 %vol while the LHV was obtained at 4201.02 kJ/kg and the tar content was obtained at 61.89 mg/Nm3. The presence of the air is limited to the pyrolysis and reduction of the gasification process. KeywordsRefuse derived fuel (RDF)Multi-stage downdraftAir ratio (AR)SyngasGasification temperature control
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