KAJIAN PEMANFAATAN GAS HASIL GASIFIKASI BIOMASSA UNTUK SUBSTITUSI BAHAN BAKAR MOTOR DIESEL

Abstract

Gasification technology as a biomass energy conversion technology produce synthetic gas (syngas) includes CO, H2, and CH4 that is flexible to use, starting from cooking with a clean flame until running the engine. One way of syngas utilization which is also done in this study is the substitution of diesel engine fuel. This study was conducted to analyze how much reduction of diesel fuel consumption in diesel engine which is substituted with gas of biomass gasification product. In this study, the diesel engine is not given load and discharge calculated free air and gasification gases into the combustion diesel engine. In this study also wasn�t calculated power diesel motors, the motor exhaust emissions during combustion, and the cost of making tools. The study was conducted with variation of diesel engine rotation each of 1000 rpm, 1500 rpm, and 2000 rpm. In addition the free air valve opening was varied for ½ openings, ¾ openings, and full openings at 2000 rpm. The measured variable is diesel fuel consumption in diesel engine combustion which is substituted with gas of biomass gasification product. It was also measured the time of the rest of syngas flare in gasifier after diesel engine combustion is finish. To determine the effect of the treatment to the diesel fuel consumption in the diesel engine combustion used statistical analysis Completely Randomize Design method (CRD) using Analysis of Variance (ANAVA). Beside it also used diesel consumption cost comparison analysis with the use of gas substitution gasification results. The results showed that the variation of engine rotation (rpm) and free air valve openings give significant effect on reducing the use of diesel fuel in diesel engine combustion. Variations of engine rotation 2000 rpm and free air valve openings of ½ yield reduction of diesel fuel with the highest average of 335 ml/hour, while the costs ratio of ones liter fuel was equivalent to charcoal biomass of Rp 8330.00 which is the cheapest cost of all treatments