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2. Methodological coupling
The original procedure developed for the inventory consists of creating a database based on simplified physico-chemical models for the sub-systems defined in figure 1 .
In this way, the LCA and process engineering methodologies are coupled, since the most important part of the inventory is carried out using Aspen Plus flowsheeting software (figure 2 ).
there are other flowsheeting software packages: – Hysis (also produced by Aspen Tech), but with a more simplified thermodynamic base; – Metsim, which has been studied but is less powerful than Aspen Plus....
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Methodological coupling
Modeling the classic steel production chain
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