Ruhr Oel GMBH this week awarded a contract for a clean-fuels project at one of Germany's largest oil refineries to Fluor Daniel, the engineering and construction unit of Fluor Corp. Fluor Daniel will revamp and upgrade two diesel desulfurizers and construct a new gasoline desulfurizer using a process from French technology provider Institut Fran�s du P�ole. The refineries' utility and infrastructure systems also will be upgraded and modified to accommodate the changes.