A Shortcut Approach to the Multi-scale Atomic Targeting and Design of C–H–O Symbiosis Networks

Eco-industrial parks “EIPs” are aimed at integrating natural resources among different participating plants. A particularly important category of EIPs involves hydrocarbon processes where intermediate species and environmental discharges may be exchanged and/or transformed to other chemical species so as to reduce the purchase of fresh raw materials and the disposal of wastes. The problem of synthesizing carbon-hydrogen-oxygen symbiosis networks (CHOSYNs) has been recently introduced along with a mathematical programming approach for the optimal design (Noureldin and El-Halwagi 2015). In this paper, a shortcut approach is developed to solve the problem of CHOSYN synthesis. Multi-scale atomic targeting is used to establish benchmarks for the carbon, hydrogen, and oxygen atoms, for the external chemical species to be purchased and discharged, and for the chemical reactions transforming the involved compounds into value-added feedstocks, intermediates, and products. Because of the algebraic nature of the devised approach, it can be readily used by process engineers and can also be used as a starting point for the mathematical programming techniques. A case study is solved in details to illustrate the implementation of the proposed approach.

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