Diesel fuel compression ignition engines

Catalysts for Diesel Fueled Compression Ignition Engines... 

Certain operating characteristics of the Diesel or compression-ignition engine result from the nature of the combustion process. In particular, the engine operates over a comparatively wide range of over-all fuel/air ratios because fuel and air are not premixed. At a given speed the range is from approximately 0.01 pound per pound (580% excess air) at no load to about 0.055 pound per pound (20% excess air) at full load. Excess air is essential to ensure complete combustion and avoid smoke production. 

Diesel fuel fnel nsed for internal combnstion in diesel engines usually, that fraction which distills within the temperature range approximately 200 to 370°C. A general term covering oils used as fuel in diesel and other compression ignition engines. 

Many studies on the performances and emissions of compression ignition engines, fueled with pme biodiesel and blends with diesel fuel, have been conducted and are reported in the literature (Laforgia and Ardito, 1994). Fuel characterization data show some similarities and differences between biodiesel and petrodiesel fuels. The sulfur content of petrodiesel is 20 to 50 times that of biodiesel. Biodiesel has demonstrated a number of promising characteristics, including reduction of exhaust emissions. 

Results of a study sponsored by the State of California Energy Commission comparing the exhaust emissions from compression ignition engines designed to operate on methanol fuel are shown in TABLE 12-11. The results are compared to typical exhaust emission levels obtained from conventional diesel engines. 

Some heating oil (generally No. 2 heating oil) and diesel fuel are very similar and are sometimes substituted for each other. Home heating oil is intended to be burned in a furnace for space heating. Diesel fuel is intended for compression-ignition engines. 

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