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Solubilities of dialkylhydrogen phosphonates in supercritical carbon dioxide and their correlation using semi-empirical equations

Deepitha, J and Pitchaiah, KC and Rao, C V S Brahmmananda and Madras, Giridhar and Sivaraman, N (2019) Solubilities of dialkylhydrogen phosphonates in supercritical carbon dioxide and their correlation using semi-empirical equations. In: SEPARATION SCIENCE AND TECHNOLOGY, 54 (10, SI). pp. 1650-1660.

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Official URL: https://dx.doi.org/10.1080/01496395.2018.1538244

Abstract

The solubilities of dibutylhydrogen phosphonate (DBHP) and dihexylhydrogen phosphonate (DHHP) in supercritical carbon dioxide were determined at 313-333 K and 10-20 MPa. The mole fraction solubility of DBHP and DHHP are in the range of 3.4 x 10(-4) to 66.4 x 10(-4) and 4.5 x 10(-4) to 806.6 x 10(-4,) respectively. The solubility data are self-consistent with Mendez-Teja model. The experimental solubilities were correlated using Chrastil, Hezave-Lashkarbolooki and three models based on activity coefficient models. Hezave-Lashkarbolooki model resulted in better solubility predictions for DBHP with an AARD of 5%. Chrastil and van Laar activity coefficient based model correlated the solubility of DHHP with a lowest AARD of 11%.

Item Type: Journal Article
Additional Information: The copyright for this article belongs to Taylor and Francis Inc.
Keywords: Solubility; supercritical carbon dioxide; phosphonates; semi-empirical equations
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Depositing User: R.S. Ranganayaki
Date Deposited: 20 Jun 2019 13:40
Last Modified: 21 Jun 2019 18:20
URI: http://eprints.iisc.ac.in/id/eprint/62763

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