From 2018, ASTM D613 add new primary reference fuel, PRF 2,2,4,6,6-pentamethylheptane(PMH)
8.3 Primary Reference Fuels—(Warning—Primary Refer- ence Fuel—Combustible. Vapor harmful. See Annex A1.)
8.3.1 Hexadecane(n-Cetane)—Hexadecane meeting the specifications
in Table 2 shall be used as the designated 100 cetane number component.
8.3.2 Heptamethylnonane (2,2,4,4,6,8,8- heptamethylnonane)—Heptamethylnonane meeting the speci- fications in Table 2 may be used as the low cetane number component that is blended with hexadecane. In binary volu- metric blends with HXD, HMN has a cetane number ARV of 15
8.3.3 Pentamethylheptane (2,2,4,6,6-pentamethylheptane)—Pentamethylheptane meeting the specifications in Table 2 may be used as the low cetane number component that is blended with hexadecane. In binary volumetric blends with HXD, PMH has a cetane number ARV of 16.3
Primary Reference Fuels are priced competitively with the market’s Secondary Reference Fuels today, from approve PRF 2,2,4,6,6-pentamethylheptane(PMH)
There is no additional training cost or cost needed for a new test method or lab process therefore users will have a seamless transition to PMH and n-Cetane.
