Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4764086 | Chinese Journal of Chemical Engineering | 2017 | 22 Pages |
Abstract
In this work, the group contribution method of Chickos et al. was applied to estimate the fusion enthalpy of isonicotinic acid, and the obtained result (29.2 kJ·molâ 1) showed a large difference with the value (135 kJ·molâ 1) as reported from literatures and as determined by differential scanning calorimetry (DSC). The results of DSC/TG measurement showed that the phase transition of isonicotinic acid from 187.27 °C to 277.47 °C underwent a sublimation process, with a sublimation enthalpy of 128.03 kJ·molâ 1. An efficient analytical technique combining pyrolysis and gas chromatography/mass spectrometry (Py-GC/MS) was used to prove this conclusion.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Dongfang Zhao, Guanghui Liu, Jian Sun, Lisheng Wang,