Processed-crude quality in US continues downward trend

A review of historical 10-year data on crude oil gravity and sulfur content shows that generally poorer-quality crudes are being processed in the US.The Energy Information Administration (EIA) reports monthly and yearly composite values of gravity and sulfur content of crudes processed within five Petroleum Administration for Defense Districts (PADDs). For a diagram of PADDs, see OGJ, Oct. 5, 1998, p. 43. Click here to enlarge imageThis article updates a previous article on gravity and sulfur contents of crudes (OGJ, Oct. 5, 1998, p. 43). Click here to enlarge imageTable 1 and Figs. 1 and 2 show composite values of gravity and sulfur contents of crudes processed in refineries in the pas...

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