February 2002

Special Report: Clean Fuels

Consider improved catalyst technologies to remove sulfur

With new catalyst systems, hydroprocessing efforts more efficiently reduce complex sulfur compounds and lower blended fuels’ sulfur content

Krenzke, L. D., Shiflett, W. K., Advanced Refining Technologies, LP

Removing sulfur in its various complex forms is an uphill battle. Current regulatory trends for refined products are headed directly toward "sulfur-free" fuels. Beginning in 2004, U.S. gasoline sulfur regulations will phase in sulfur reductions and require an average gasoline sulfur level of 30 ppm with a cap of 80 ppm. To meet these stringent demands will require FCC feed sulfur contents reminiscent of what used to be considered diesel sulfur specs. The Canadian fuels sulfur situation also parallels the U.S. trend. Highway diesel, indeed, will truly be ultra-low sulfur diesel (ULSD.) New regulations mandate the sulfur content to be less than that of gasoline-capped at 15 ppm

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