In refinery

hydrogen

which is a precious and clean energy resource

is also the by-product and significant material source of petroleum refining and petrochemical hydrogenation process.To reduce cost and save energy for petrochemical industry

the hydrogen system should be operated under the optimal scheme to meet the varying demand from process.In this paper

the impact factors of hydrogen system operational scheduling are elaborated.A mixed integer nonlinear programming(MINLP)model that involves all the impact factors is established to optimize the multi-period scheduling of hydrogen system and solved with Lingo software.A case study based on the data from certain refinery factory is showed to demonstrate the effectiveness and feasibility of the scheduling methodology

as well as this method proposed plays an important role in guiding the scheduling of hydrogen system in refinery.