Worldwide Refinery Processing Review (Quarterly Issues) Publication date:1Q 2009 Item#:B20901 Around the world, increasing demand for ultra-clean gasoline and diesel fuels and the rising use of heavy sour crudes has prompted many refiners to expand hydrotreatinig and hydrocracking capacity. As a result, the hydrogen and sulfur plants have become significant pieces in the refinery puzzle. This issue of the Review covers the expanding role of the sulfur and hydrogen plants in terms of available technology, processing considerations, and innovative R&D work.