Graphical approach to determining the thermobaric boundaries of the explosive range of monoethanolamine in nitric acid solutions

Graphical approach to determining the thermobaric boundaries of the explosive range of monoethanolamine in nitric acid solutions.

Sokolov I. P., Smirnov A. V., Belova E. V.

The analysis of data on the thermal stability of nitric acid solutions (0,8–6,6 mol/L) of monoethanolamine in the temperature range of 90–150°C and above atmospheric pressure was carried out. Determined were the dependences of:
▪ the onset temperature of a thermal explosion on the concentration of nitric acid;
▪ the induction period on the nitric acid concentration and thermostat temperature;
▪ the explosion pressure on the concentration of nitric acid and the onset temperature of the thermal explosion.
A change in the reaction mechanism with increasing temperature and concentration of nitric acid was established.
Graphs of T–C–P and T–C–d diagrams with the boundaries of the explosive range were presented. The levels of explosion pressure and induction period in the explosive range were estimated.

► Keywords: monoethanolamine, nitric acid, differential scanning calorimetry, heating in autoclave, graphical approach, thermal explosion, explosive range.

Article language: Russian. Pp. 17–27. [in Russian]. DOI: 10.26277/SECNRS.2024.112.2.002.