PHYSICAL PROPERTIES ANALYSIS OF GASES EMISSION OF BLEND BIODIESEL BURNING PROCESS IN A FIRE TUBE BOILER

The use of biodiesel in boilers has great benefits because it reduces exhaust emissions. The purpose of this study is to test the quality of fossil diesel and biodiesel oil as fuel for fire Tube Boiler. The research is conducted by analyzing the concentration of exhaust gases (NOx, CO2, SO2) which is emitted by the Fire Tube Boiler. The combustion system in boiler tends to be simpler than compression ignition as is done with diesel engines. In this research, The authors are using a fire tube boiler, with a heat input rate of 60,000 kCal/hour and a pressure of 3 bar gauge. Biodiesel from crude palm oil (CPO), is blended with fossil diesel oil in various concentrations of 0, 5, 10, 15, 20 and 25% ( B0, B5, B10, B15, B20 nd B25) and used as fuel for the boiler. This research is carried out experimentally by testing the exhaust gas emitted from the stack. The stack is expected to produce a low exhaust emission and environmentally friendly. The results show that the increase of biodiesel percentage in fossil fuel can reduce the concentration of some hazardous compound in exhaust gas emission. The lowest concentration of the hazardous compound has emitted the boiler which uses a blending of 25 % biodiesel and 75 % fossil diesel (B25) as its fuel. The lowest exhaust gas emissions are 4.142 ppm (NOX); 12.50 ppm (SO2) and 7.9% (CO2).