Cetane enhancers

High-speed diesel engines require fuel with a higher cetane number/index to run effectively. With the increasing supply of heavier crude petroleum, diesel with a high cetane number is more difficult to produce. Thus, in some cases, it is necessary to add a cetane improver or enhancer to diesel at the refinery.

There are several ways to increase the cetane number, including:

There is neither a limit, nor a preferred cetane improver, set by the specifications. It is therefore left to refiners and oil marketing companies to choose.

The most common cetane improver used globally, is 2-