Open AccessThe Effect of DC Voltage on Solidification of Tetrabutyl-Ammonium Bromide (TBAB) Aqueous Solution
Author(s) -
Aulia Rahman,
Ahmad Swandi,
Radhiah Anggraini,
Risky Afandi Putri,
Dadang Kurnia,
Inge Magdalena Sutjahja
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 - 10.1088/1742-6596/1949/1/012006
Subject(s) - ammonium bromide , materials science , aqueous solution , voltage , nucleation , electrode , bromide , supercooling , hydrate , repeatability , analytical chemistry (journal) , chemical engineering , chemistry , inorganic chemistry , chromatography , thermodynamics , electrical engineering , organic chemistry , pulmonary surfactant , physics , engineering
This study aimed to investigate the nucleation process of 23 wt% tetra-n-butyl ammonium bromide (TBAB) aqueous solution due to DC voltage. TBAB hydrate is an example of a thermal energy storage system with a phase change temperature of around 0–12 °C. The commonly sold copper electrodes are inserted into the sample to supply the voltage continuously. The diameter of the electrodes was 1 mm, and the gap was approximately 0.5 mm. The applied voltage varied as the experimental parameter is in the range of 0 to 30 V. Two repetitive freezing-thawing experiments are performed to ensure data repeatability. The experimental results showed that the TBAB hydrate would not form until a minimum value of 20 V of DC voltage was applied. The increase of the voltage used led to higher solidification temperature and reduction of the supercooling degree.