Determination and modelling of solubility of o-aminobenzamide and its mixture with o-nitrobenzoic acid in supercritical carbon dioxide. (June 2016)

• Record Type: Journal Article
• Authors: Zhu, Jing; Wang, Yubo; Chang, Chengwei; Wang, Hailun; Jin, Junsu
• Is Part Of: Journal of CO₂ utilization. Volume 14(2016)
• Page Start: 83
• Page End: 92
• Publication Date: 2016-06
• Subjects: Solubility -- o-Aminobenzamide -- o-Nitrobenzoic acid -- Supercritical carbon dioxide -- New expanded liquid model; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2016.02.011
• Languages: English
• ISSNs: 2212-9820

Abstract

Highlights: Solubility of o -NBA and its mixture was determined in SCCO2 with dynamic method. The separating effect of o -NBA and o -AB mixture was studied. Solubility of o -AB and o -NBA was correlated with four expanded liquid models. A new expanded liquid model was proposed and tested with solubility of 92 solutes. Abstract: To research functional group effect on the solubility of o -aminobenzamide ( o -AB) and o -nitrobenzoic acid ( o -NBA) for each other, solubility of o -AB and its mixture with o -NBA in supercritical carbon dioxide (SCCO2 ) was measured with dynamic method at temperatures ranging from 308 to 328 K and pressures ranging from 10.0 to 21.0 MPa. Then solubility of o -AB and o -NBA was correlated with four commonly used expanded liquid models. In addition, 2365 solubility data of 90 kinds of solid solute, coupled with solubility of o -AB and o -NBA in this work (2425 data points in total), were used to compare the correlation accuracy of the four expanded liquid models, and the best correlation accuracy was obtained by δ 2 ∼ δ 1 / v 1 model. To evaluate the effect of heat capacity terms that is usually ignored during the derivational process of expanded liquid models, a new expanded liquid method (M- δ 1 / v 1 model) was proposed based on δ 2 ∼ δ 1 / v 1 model and tested by the above mentioned 2425 groups of solubility data. The correlated results showed that M- δ 1 / v 1 model achieved the minimum average absolute relative deviation (AARD, %) 9.72% among the five models of 30.05%, 14.22%, 13.91%, 15.07% for δ 2 ∼ ρ, δ 2 ∼ ρ d, δ 2 ∼ δ 1 / v 1, and β 12 ∼ ρ 2 models, respectively. Furthermore, the result of statistical tests of δ 2 ∼ δ 1 / v 1 and M- δ 1 / v 1 models indicated that the best correlation accuracy of M- δ 1 / v 1 model could be attributed to the additional consideration of the heat capacity terms, rather than the more adjustable parameters.