Journal
CHEMICAL ENGINEERING COMMUNICATIONS
Volume 207, Issue 5, Pages 612-631Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00986445.2019.1613230
Keywords
Fluid catalytic cracking; Genetic algorithms; Multiobjective optimization; Particle swarm optimization; Surrogate models
Categories
Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico [143241/2008-7]
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This article provides a concise multiobjective optimization methodology for an industrial fluid catalytic cracking unit (FCCU) considering stochastic optimization techniques, genetic algorithms (GA) and particle swarm optimization (PSO), based on surrogates or meta-models in order to approximate the objective function. A FCCU was considered and simulated in an AspenONE process simulator. In addition the article examines the claim that PSO has the same effectiveness (finding the optimal global solution) as GA, but with significantly better computational efficiency (fewer function evaluations). The optimization results obtained with the PSO technique, based on the evaluation of less functions and adjustment of less parameters, showed a 3% increase in yield of naphtha as compared to results obtained with the GA technique. Finally, the results of the optimization obtained with the stochastic optimization techniques were compared and analyzed with a deterministic one. The performance targets of the multiobjective operational optimization supported the FCCU design and production planning to ensure refinery profitability and a regulatory environment.
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