Abstract
Hydrogen is an expensive secondary resource and energy, especially for refineries. In recent years, due to increasing processing capacity, composition variation and quality deterioration of crude oil, as well as stricter environmental regulations, hydrogen consumption has been increasing sharply to satisfy various hydroprocessing operations to produce eligible product oil. As a result, hydrogen production relies more and more seriously on nonrenewable resources, such as natural gas and coal. Furthermore, the accompanying emissions to the environment caused by hydrogen production are also undesirable. Hydrogen network integration can effectively utilize and conserve hydrogen for refineries, relieving both their budget on hydrogen production and environmental impact, and thus became a hot research topic since approximately two decades ago. This chapter will focus on hydrogen network integration with purification reuse, which is performed by a graphical approach in pinch diagram. Two cases are employed to demonstrate the visual solution for hydrogen networks.
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