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Octane costs and values are often described in terms of dollars per octane-barrel ($/AKI-b).21 To measure the cost of producing incremental octane, we calculate the cost of producing an incremental barrel of premium gasoline (CTP) by raising reformer severity (Figure 29, red and black lines).
The carbon percentage of octane (C 8 H 18 ), a stand-in for gasoline, and hexadecane (C 16 H 34 ), a stand-in for diesel, are 84.2% and 85.0% respectively. The amount of carbon dioxide produced from gasoline and diesel and therefore the carbon pricing, are also both very similar on a mass basis.
In refining, marginal costs typically drive market prices • Catalytic Reforming units are the primary controllable octane source in the refinery • Refiners can optimize unit throughput and severity (octane of product) • Higher octane results in higher costs • Reformers convert naphtha feedstock into highoctane, high- -aromatics
To assess octane costs, this study examines trends at the national, the Petroleum Administration for Defense District (PADD), and the regional wholesale market levels. The market for motor gasoline is global, and the U.S. gasoline market is interconnected with the global gasoline market through imports and exports.
The octane rating of a specific gasoline mixture is based off the ratios of two compounds in the gasoline— iso-octane, a compound with the same chemical formula as octane but with slightly different structure and properties (they are chemical isomers ), and normal heptane.
Jun 28, 2017 · According to the latest data from AAA (which tracks fuel prices daily instead of the EIA’s weekly), premium costs $2.80 per gallon on average, or 60 cents more than regular.
Feb 22, 2017 · Whether you are choosing 87, 89, or 93-octane rated gasoline, you're not buying octane. Why? Because if you were actually putting octane into your car, it would screw it up big time. The "octane" rating of gasoline actually measures the amount of an additive called isooctane.
