PENTAMETHYLHEPTANE AS A PRIMARY REFERENCE STANDARD FOR CETANE NUMBER

摘要

A composition useful as a Reference Standard for measurement of Cetane Number or for use as a standard for determining a Derived Cetane Number consists essentially of a blend of n-hexadecane and 2,2,4,6,6-pentamethylheptane. The disclosed Reference Standards can be used directly as substitutes for blends of n-hexadecane and 2,2,4,4,6,8,8-heptamethylnonane in ASTM D613-10a for determining Cetane Number, or in ASTM D6890, ASTM 07170 or ASTM D7668 to determine a Derived Cetane Number.

主权项

1. A composition useful as a reference standard for measurement of a Cetane Number of a fuel, consisting essentially of a blend of (1) n-hexadecane and (2) an isoparaffin having 12 carbon atoms or a combination of isoparaffins having 12 carbon atoms.