November 2001

Special Report: Refining Developments

Update hydrotreaters to process ‘green’ diesel

Worldwide, refiners must adopt processing strategies to achieve nearly sulfur-free fuels. It is possible when utilizing newer catalysts and improved design technologies

Lawler, D., Robinson, S., Stone & Webster Ltd

Over the last ten years, society's expectations regarding clean fuels has been informed by continuing research into the overall impact of fuels on the environment. Governments in Europe and the U.S. are now regulating to meet these expectations and have set tight specifications. The diesel sulfur specification in Europe is 50 ppm and is referred to as ultra-low-sulfur diesel (ULSD). By 2005 in Europe, all road diesel will be ULSD. Equally important, Europe is introducing a 10-ppm sulfur specification that is referred to as near-zero-sulfur diesel (NZSD). On May 11, 2001, the European Commission (EC) adopted a proposal to introduce 10-ppm sulfur in diesel and gasoline in all EC memb

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