US refiners continue to process crudes with lower gravity, higher sulfur

01/03/2005
The gravities of crude oils processed in US refineries have slowed from a previously rapid decline in quality to a decrease of 0.10° API/year during 1994-2003. In that same period, there was a moderate increase in sulfur content of the lower-quality crudes, about 0.038 wt %/year. Click here to enlarge imageThe US Energy Information Administration (EIA) began reporting monthly and yearly composite values of °API and sulfur content of crude oils processed within five Petroleum Administration for Defense Districts (PADDs) 20 years ago. Table 1 shows the latest 10-year (1994-2003) historical composite values of API gravity and sulfur content of crude oils processed by refineries in...
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