Process for preparing tier 3 reference fuel
An aromatic pre-blend for use in preparing E10 test fuel in accordance with 40 CFR 1065.710(b) includes a mixture of aromatic compounds having C6-C10+ aromatic proportions as recited in 40 CFR 1065.710(b).
1. An aromatic pre-blend for use in preparing E10 test fuel in accordance with 40 CFR 1065.710(b), the aromatic pre-blend comprising:
a mixture of aromatic refinery blendstocks including (i) at least one of Aromatic-100, Aromatic-150 and Aromatic-200; and (ii) at least one of benzene, toluene, xylene, trimethyl benzene, diethyl benzene and tetralin, the resulting mixture having a C7:C6 ratio in units of volume of 5.2-6.4:0.5-0.7, a C8:C6 ratio in units of volume of 5.2-6.4:0.5-0.7, a C9:C6 ratio in units of volume of 5.2-6.4:0.5-0.7, and a C10+:C6 ratio in units of volume of 4.4-5.6:0.5-0.7, and a total aromatic compound content of at least 90 volume percent.
2. The aromatic pre-blend of claim 1 , having a total aromatic compound content of at least 95 volume percent.
3. The aromatic pre-blend of claim 1 , having a total aromatic compound content of at least 98 volume percent.