Comparison between the artificial neural network, SAFT and PRSV approach in obtaining the solubility of solid aromatic compounds in supercritical carbon dioxide

• Published in: The Journal of supercritical fluids Vol. 77; pp. 44 - 51
• Main Authors: Vaferi, B., Karimi, M., Azizi, M., Esmaeili, H.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-05-2013
• Subjects: Aromatic compounds; Artificial neural network; Learning theory; Mathematical models; Mixing rules; Networks; Neural networks; Optimization; PRSV EOS; SAFT EOS; Solid aromatic solubility; Solubility; Supercritical carbon dioxide; Supercritical carbon dioxide; Artificial neural network; PRSV EOS; SAFT EOS; Solid aromatic solubility
• ISSN: 0896-8446; 1872-8162
• DOI: 10.1016/j.supflu.2013.02.027

•ANN is used to model the solubility of solid aromatic compounds in supercritical CO2.•The ANN model estimates solubility of solid aromatic compounds with AARD%=4.99.•The ANN model predicts solubility of eight solids aromatic with MSE=7.08×10−7.•The predictive capability of ANN has been benchmarked with SAFT and PRSV EOS.•Results confirm that our ANN model is more accurate than other approaches.
The aim of this study is to model the solubilities of solid aromatic compounds in supercritical carbon dioxide (SCCO2) using feed-forward artificial neural network (ANN). Temperature, pressure, critical properties and acentric factor of each solute have been used as independent variables of ANN model. The parameters of multi-layer perceptron (MLP) network have been adjusted by back propagation learning algorithm using experimental data which have been collected from various literatures. In order to find the optimal topology of the MLP, different networks were trained and examined and the network with minimum absolute average relative deviation percent (AARD%), mean square error (MSE) and suitable regression coefficient (R2) has been selected as an optimal configuration. By this procedure a single hidden layer network composed of nineteen hidden neurons has been found as an optimal topology. Sensitivity error analyses confirmed that the optimal ANN can predict experimental data with an excellent agreement (AARD%=4.99, MSE=7.08×10−7 and R2=0.99699). Capability of the proposed ANN model has compared with those published results which have obtained by SAFT combined with eight different mixing rules (one, two and three parameters mixing rules) and PRSV equation of state (EOS). The best presented overall AARD% for SAFT approach with one, two and three parameters mixing rules are 16.15, 12.32% and 7.65%, respectively while PRSV EOS showed AARD% of 21.10%. The results emphasize that the proposed ANN model can predict the solubilities of solid aromatic compounds in SCCO2 more accurate than SAFT and PRSV EOS.