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Gold/Mining/Energy : Big Dog's Boom Boom Room
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To: sammaster who wrote (100685)5/9/2008 4:33:42 PM
From: Elroy Jetson  Read Replies (1) of 206084
 
Your question assumes a simple distillation process.

is there a higher percentage of diesel than gasoline fraction in heavy oil than light oil?

With this assumption, heavy oil (being high in carbon and low in hydrogen) is most useful for producing asphalt and a small range of other products.

In a state of the art refinery, (lots of capital upgrades) heavy oil is split and combined with natural gas to produce those products you prefer with a great deal of latitude. An example is Chevron's Pascagoula Mississippi refinery.

Using different capital intensive techniques the aromatic fraction of light crude can be reformed at very low temperatures into rings with lower combustion (higher octane). An example is the Chevron refinery in Richmond California.

In general it is easier to crack than to reform, so you're more likely to see gasoline produced than diesel.
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