INVESTIGADORES
DIAZ Maria Soledad
artículos
Título:
Life Cycle Optimization for Sustainable Operations in a Petrochemical Complex
Autor/es:
ANTONIO GONZALEZ CASTAƑO; J. ALBERTO BANDONI; MARIA SOLEDAD DIAZ
Revista:
CHEMICAL ENGINEERING TRANSACTIONS
Editorial:
AIDIC Servizi Srl
Referencias:
Lugar: Milan; Año: 2015 vol. 43 p. 1141 - 1146
ISSN:
2283-9216
Resumen:
This paper addresses the optimal operation of a petrochemical complex under economic and environmental  criteria. The site mathematical model includes linear and nonlinear simplified models for single plants to  calculate site production taking into account main operating variables, intermittent deliveries and inventory  variable profiles. The objective function considers the maximization of total profit and the minimization of  environmental impact, subject to constraints on mass balances, bounds on product demands, equipment  capacities and intermediate and final product storage tanks limitations. The environmental objective is  measured with the global warming potential (GWP) and Eco-indicator 99 metrics according to the life cycle  assessment procedures. The resulting mixed integer nonlinear programming (MINLP) models have been  implemented in GAMS. The bi-criteria MINLP model is solved with the ε-constraint method. The resulting   pareto-optimal curve shows the tradeoff between the economic and environmental aspects to pursuit a  sustainable operation of an existing integrated petrochemical complex. The optimal solution shows that  polyethylene plants have the best environmental and economic performances in the entire complex. As  compared to current situation, optimization results show that the petrochemical complex can satisfy product  demands while improving the environmental behavior by decreasing greenhouse gases emissions in almost  26 %, from 1,018 to 750.42 kt CO2-eq/y.