SIMULATION ANALYSIS DESIGN EXPERIMENTAL OF NATURAL GAS – DIESEL OXIDATION IN FLEX FUEL ENGINE

Petroleum and Gas Engineering

Research into alternative fuel oxidation methods has been driven by recent stringent pollution legislation and the desire to reduce global CO2. The use of dual-fuel technology improves thermal efficiency and reduces pollution by using two fuels instead of one. Because of its low price and relatively low environmental impact, natural gas is a viable short-term solution. In a compression ignition engine, natural gas may improve performance while decreasing carbon dioxide emissions. Inefficient oxidation of natural gas-diesel fuel and increased emissions of unburned hydrocarbons and carbon monoxide occur under low engine loads. This report presents the findings of experimental and modeling studies of natural gas-diesel dual-fuel operations in three engine designs. Diesel infusion and air-path techniques on reduced-zone oxidation performance were investigated using a multi-cylinder engine, as well as two single-cylinder engines with and without visual access. Low-load, clean oxidation is made possible by injection pressure and diluting the input charge. Better diesel injection might lead to more consistent combustion and better cylinder oxidation. In order to lower NOx emissions and improve thermal efficiency of brakes, significant quantities of exhaust gas recirculation are needed.

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