June 2004

Special Report: Process/Plant Optimization

Optimize short-term refinery scheduling

Constraints, different mathematical programming techniques and integrating scheduling subsystems must be considered

Scheduling activities of oil refineries are becoming increasingly difficult because of tighter constraints: New commercial specifications, most particularly the low-sulfur content of automotive fuels, have an impact on proper scheduling of tank allocations, line up selections and blend sequences to minimize contamination risks. New crudes or condensates are processed with increasing requirements of segregation by yields, suitability for bitumen production, and sulfur and metals content. Shareholders are generally limiting available storage for crudes, intermediate streams and products to minimize costs of excessive inventory. Market trends are b

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