Cetane
Case History 8. Loss of response from the cetane additive as component ratios vary.
A refinery blending near to the minimum Cetane Index and boosting the quality with additive to achieve the cetane number as measured by IQT.
Cemeg Consultancy
The benefit in cetane from 2-ethyl hexyl nitrate is generally reliable and predictable across blends. In this case the Cetane Index calculation (CI) was found in certain blends to be overpredicting for cetane in not agreeing with cetane numbers for the base fuel as measured by IQT (CN). Corrections for two of the blend components were established to help correct the CI calculation to reflect the CN. An on-line analyser was later installed to measure CN directly in the dosed blend header and help adjust dosages.