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During the early 1990s gasoline sulphur levels were approximately 340 ppmw [1]. With new levels set in 2000, refiners are reducing sulphur to 150 ppmw. By 2006, the US EPA proposes to reduce sulphur to 30 ppmw with phased reductions beginning in 2004. European regulations call for reductions to 50 ppmw by 2005 while Canadian regulations require 30 ppmw by 2004 [1]. Farther ahead, the US EPA has called for even lower targets of 10 ppmw.
Continuously lower levels of gasoline sulphur present new challenges to develop and identify viable low cost solutions for reduced gasoline sulphur content in motor gasoline.Effective solutions to manage gasoline sulphur content involve choosing the best technology options for sulphur removal, as well as selecting designs that best fit the operating philosophy for refiners.
Important to gasoline sulphur management strategies is understanding how the various sulphur species are distributed in fractionator gasoline cuts which is critical in determining the optimum operating conditions of gasoline fractionators.
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