Journal
COMPUTERS & CHEMICAL ENGINEERING
Volume 46, Issue -, Pages 105-123Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compchemeng.2012.06.006
Keywords
Biodiesel production; Superstructure optimization; Process synthesis; Surrogate models artificial neural networks
Funding
- Graduate School at the University of Tulsa
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Biodiesel is an attractive biofuel because it can be used directly with the traditional petro diesel engines, either as a substitute or as a blending component. There are several alternatives that can be used to produce biodiesel. In this work, we developed a superstructure optimization model to synthesize the optimum biodiesel production plant, i.e., the one that gives the minimum net present sink. To reduce the computational cost of solving the resulting disjunctive programming, the surrogate models utilizing artificial neural networks (ANNs), have been developed to replace the unit operation, thermodynamics and mixing models. The optimum solution with the alkali-catalyzed reactor (obtained in five CPU seconds) has a total net present sink of about $41 million, which differs less than one percent from the result obtained by modeling the solution in a process simulator. However, this level of accuracy required a large amount of data to train the ANNs. (C) 2012 Elsevier Ltd. All rights reserved.
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