Screening of process alternatives based on sustainability metrics: comparison of two decision-making approaches

Importance of sustainability concerns demands consideration of sustainability design criteria in early stages of process design. Most often there are several alternatives for a particular process which must be compared in terms of sustainability metrics to select the most sustainable design. There are several tools available for evaluation of process alternatives in terms of sustainability concerns. However, there is a need for a screening method which enables engineers to compare and select several alternatives in terms of a multitude of metrics and also incorporate their preferences if required. This study utilizes a recently developed sustainability evaluator for process evaluation and compares overall impact factor method for process screening with a novel fuzzy-based approach. The applicability of the proposed method is demonstrated though application of the methodology on ibuprofen case study to select the most sustainable design.

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