This study presents a method for petrochemical complex to make most efficient use of hydrogen. Hydrogen is an important utility in the production of clean fuels such as low-sulfur gasoline and diesel. The methodology is based upon mathematical optimization of a superstructure and maximizes the amount of hydrogen recovered across a site. The techniques account for constraints as well as the existing equipment and are suited for revamping real, industrial systems. The optimum network of new equipment such as compressors and purification units is also considered. The methods are illustrated with an industrial case study, where both operating cost savings and hydrogen recovery are achieved. The approach in this study can account for economic issues such as payback time and capital budgets while delivering process designs that make best use of resources.
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