Abstract:
In using the natural gas with diesel fuel in diesel engine is called Diesel-Dual Fuel (DDF) engine that affect the amount of soot and NOx decrease, while the amount of CO and HC are increasing. Moreover, the operating conditions of the Diesel Oxidation Catalyst (DOC) that is designed to reduce emissions from diesel engines change accordingly. Therefore, control of exhaust emissions below the level permitted is considered, when the characteristics of fuel and combustion process is different. In this study has used the synthesis exhaust gas system to simulate exhaust gas from diesel engine 4 cylinder 2.5 liter, which meet EURO III standard. The synthetic exhaust gas is similar to the exhaust gas from the DDF engine, when the engine is operated by conventional diesel combustion and DDF combustion at the same speed and load. Then, the synthetic exhaust gas is released to the DOC, which the outside temperature is controlled by a furnace. The experiment use The DOC was installed on the conventional diesel engine to compare the effectiveness of reducing CO and HC. Such knowledge the extent of
reduction in emissions of DOC installed conventional diesel engine. For improve its performance when the different types of fuel is used.