Carbon oxides Cetane

Anti-oxidation Cetane improvement Dispersion Anti-icing Detergent Metal passivation Corrosion inhibition Cold-flow improvement Minimize oxidation and gum formation during storage Increase cetane number Improve behavior in fuel injectors Minimize ice formation during cold weather Control deposition of carbon in the engine Deactivate trace metals that can accelerate oxidation Minimize rust throughout the diesel fuel supply chain Improve flow characteristics in cold weather... 

Because of the low-sulfur, -nitrogen, and -aromatic content of Fischer-Tropsch fuels, there is renewed interest in these products. In two recent studies, Fischer-Tropsch diesel was evaluated and compared to an ultra-low sulfur California diesel and to a 49 cetane number, low-sulfur diesel. In the two studies, carbon monoxide, nitrogen oxide, hydrocarbon, particulate, and carbon dioxide emissions were reduced in vehicles fuels by Fischer-Tropsch diesel. The fuel economy, however, was also reduced. The low aromatic content and high concentration of waxlike hydrocarbons in Fischer-Tropsch diesel can lead to the need for special handling and treatment of the fuel to prevent gelling when used in cold-temperature conditions. 

Furthermore, biodiesel is variable depending on the source of the fuel and its age (27). For example, Monyem and Van Gerpen (27) observed decreased carbon monoxide and hydrocarbon emissions from oxidized neat biodiesel when compared with unoxidized biodiesel. In addition, cetane number is inversely proportional to iodine value (28) and proportional to biodiesel age (29). 

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