Algebraic Approach for the Integration of the Hydrogen Network with a Single Impurity
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Type
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Journal
Article
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Author
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Minbo
Yang
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Author
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Xiao
Feng
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URL
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Volume
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55
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Issue
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3
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Pages
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615-623
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Publication
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Industrial
& Engineering Chemistry Research
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Date
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January
27, 2016
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Abstract
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Fresh
hydrogen is an expensive utility in refineries. The integration of hydrogen
networks can make full use of hydrogen and reduce the fresh hydrogen
consumption. Authors present a rigorous algebraic approach based on the pinch
conception to identify the minimum fresh hydrogen consumptions and pinch
locations of hydrogen networks. The approach derives from an existing
graphical method by transforming the moving procedure of the source composite
curve into an algebraic calculation according to the geometrical
transformations.
The conception of relative flow rate is introduced to describe each hydrogen source and sink. On this basis, a noniterative algebraic procedure is developed to figure out the surplus fresh hydrogen in each interval. Finally, the minimum fresh hydrogen consumption and pinch location can be identified. Furthermore, the proposed approach can be enlarged by considering the hydrogen purification process, and the purification process can be further analyzed to minimize its feed flow rate. This approach has a clear conception and an easy procedure and is valid for the hydrogen network with fresh hydrogen of any hydrogen concentration. A conventional hydrogen network is analyzed to test the applicability of the proposed approach. |
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