ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

A new semi empirical model for the solubility of dyestuffs in supercritical carbon dioxide

Ratna Surya Alwi and Chandrasekhar Garlapati

Chemical Engineering Department, Fajar University, Makassar, Indonesia

E-mail: ratnasya@gmail.com

Received: 11 November 2020  Accepted: 18 December 2020

Abstract:

Solubility determination and prediction of azobenzene and anthraquinone derivatives in supercritical carbon dioxide (ScCO₂) is a challenging and tedious task. Therefore, proper prediction of these solutes are quite important for application of ScCO₂ technologies to dyeing industries. In this work, a new semi-empirical model is developed to correlate industrially important dye compounds solubility in ScCO₂. The proposed model successfully correlated solute solubility of 22 industrial dye compounds in supercritical carbon dioxide (ScCO₂). The correlating ability of the new model is compared with 16 existing literature solubility models in terms of various statistical parameters (AARD, R², adj. R², SSE, and RMSE). Furthermore, Akaike’s information criterion was employed to evaluate the relative goodness of the model. We found that the proposed model is correlating better than existing models considered.

Keywords: Semi empirical model; Solubilities; Supercritical carbon dioxide; Anthraquinone; Azobenzene; Akaike’s information criterion (AIC)

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-020-01482-x

Chemical Papers 75 (6) 2585–2595 (2021)