(350b) A Sustainable Framework for Chemical Manufacturing and for the Integration of Advanced Control with Sustainability Assessment
This framework is comprised of four main parts: (i) process and sustainability assessment model construction; (ii) multi-objective optimization formulation; (iii) implementation of the advanced control strategy; and (iv) a life cycle inventory generation. For the model construction part, the process systems model is based on existing mathematical models obtained from the literature, while the system sustainability assessment model can be developed based on the GREENSCOPE  sustainability assessment tool indicators in four categories (economic, environmental, efficiency, and energy). Once the models for process and sustainability assessment are established, the multi-objective optimization problem is formulated based on economic and integrated sustainability impact objectives. The resulting multi-objective nonlinear programming problem is solved using optimization algorithms to generate a Pareto-optimal set. Based on a ranking scheme algorithm for decision making, optimal solutions are selected from the Pareto set and sent to the controller as desired set points. The third step then corresponds to the controller implementation to keep the process system at the chosen optimal sustainable operating points. For this step, an advanced biologically inspired optimal control strategy (BIO-CS)  is applied to handle the multiple and conflicting objectives. Finally, the fourth step consists of generating a life cycle inventory from the optimized chemical manufacturing stage. Preliminary results associated with the application of the developed approach to a fermentation process example  considering performance objectives demonstrated the potential of this framework. In this presentation, we will discuss the implementation of the novel framework to automatically take the selected process to the optimal steady state determined by the multi-objective optimization algorithm according to the decision maker.
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