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| - E-Green − A Robust Risk-Based Environmental Assessment Tool for ProcessIndustries
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| - This paper proposes a risk-based environmental assessment approach (E-Green) for evaluating different processoptions at an early design or a retrofit stage. The approach splits the cradle-to-gate life cycle into twodomains: the raw materials production and supply domain and the process domain or gate-to-gate domain.It allows an analyst to investigate adverse impacts of the process activity on each domain separately andresults in a more manageable assessment of process design alternatives. It is a risk-based approach contraryto the existing hazard-based approaches. E-Green replaces the conventional normalization step of the impactassessment phase of a life cycle assessment (LCA) with a ranking step, which compares the effect scores ofall the impact categories for different options and gives a relative score to each option. This eliminates thecomplexity and bias of the conventional normalization step in the evaluation phase and enables the analystto perform the effective evaluation easily. The applicability of the E-Green has been illustrated in the assessmentof two solvent options in an acrylic acid manufacturing plant. E-Green methodology is implemented bycombining an Aspen-HYSYS process simulator and a quantitative exposure assessment tool (E-Fast).
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