engleski

Hydrogen management in petrol rafinery

Considering the importance of hydrogen in oil refining, it is necessary to ensure its most efficient use to satisfy refinery hydrogen requirements. Effective hydrogen management provides maximum utilization of hydrogen. Mass balance of streams containing hydrogen plays a key role in addressing the hydrogen network optimization problem. The purpose of this work is to analyze refinery hydrogen network, composed of hydrogen sources and sinks. Mass integration principles and techniques have been applied in the optimization of refinery hydrogen network. Methodology of hydrogen network integration is presented in a case study of local oil refinery. Hydrogen pinch analysis is applied for targeting the minimum hydrogen consumption of the hydrogen system. Superstructure based mathematical model of hydrogen network is developed to minimize the total operating cost. Non-linear programming optimization problem is solved by using optimization software GAMS. An additional hydrogen purification unit is introduced in the existing hydrogen network and the effect on overall network is investigated. Network design with two hydrogen purification units has proved to be an optimal solution, with respect to the chosen objective function. Maximum utilization of hydrogen within the network can be achieved by purification of waste gas. The amount of hydrogen that is sent to a fuel gas system is 51% lower compared to the current state, and the amount of hydrogen in catalytic reforming is 21% lower. Efficient and rational management of the hydrogen is obtained by integrating of hydrogen network in refinery with economic and environmental contribution.

hydrogen management; mass integration; pinch analysis; superstructure; mathematical programming methods

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