Oxygenates, properties octane number

Oxygenates are added to gasoline to reduce emissions. However, they can only be effective if the hydrocarbon fractions are modified to utilize the oxygenate s octane number and volatility properties. If the hydrocarbon fraction is not correctly modified, oxygenates can even increase smog-forming and toxic emissions both of which are undesirable. It should also be noted that oxygenates do not necessarily reduce all toxins,... 

Consider ethyl-tertiary-butyl-ether (ETBE) as an alternative gasoline oxygenate to MTBE. While the latter appears to have the best combination of properties such as oxygen content, octane number, energy content, and cost, the former can be manufactured using ethanol according to ... 

One of the advantages of GC-MS over an IR spectroscopic analyzer is the ability to measure distillation characteristics as well as predict other properties. There are several other materials that can be directly measured and reported. These include benzene, total aromatics, oxygenates, certain sulfur compounds and additives. The properties that can be predicted include (among others) cetane number and index, research and motor octanes, refractive index, distillation properties, aniline point, cloud point, pour point, volatility, flash point, density, conductivity, and viscosity [57]. 

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