Open AccessInfluence of microadditive of carbon dioxide on the kinetics of boiling-up of superheated n-pentane
Author(s) -
S. A. Perminov,
E. V. Lipnyagov,
Maria A. Parshakova
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2039/1/012027
Subject(s) - superheating , boiling , pentane , thermodynamics , carbon dioxide , boiling point , tube (container) , materials science , bubble , kinetics , impurity , adsorption , chemistry , analytical chemistry (journal) , chromatography , composite material , mechanics , organic chemistry , physics , quantum mechanics
The effect of a low-boiling impurity (CO 2 gas <1.5% mol) on the kinetics of boiling-up of superheated n-pentane in a vertical glass tube have been studied by high-speed video (2050 fps). The method of continuous pressure decrease from 2.00 to 0.10 MPa (in the temperature range of 100.2-145.1 °C), as well as the method of measuring the lifetimes of superheated liquids at 0.10 MPa (90.2-134.1 °C) have been used. The inner surface of the tube has two visible defects, one of which defines the boundary of the attainable superheat. After degassing the system, the defects of tube cease to play an appreciable role, the active centers are redistributed. The temperature of the attainable superheat increases from the initial value by 20 °C in tests with gas and by 10 °C in subsequent tests without it. The result obtained may be related to physical gas adsorption on the glass surface during the process of evacuation of the system.