Gas Evolution in Rotating Electrochemical Cells Under Reduced and Normal Gravity Conditions

Autor:	Simon Ostrach, Yasuhiro Kamotani, Fang-Bor Weng, Ay Su
Rok vydání:	2003
Předmět:	Gravity (chemistry) Materials science Electrolysis of water Applied Mathematics Mechanical Engineering Bubble Gas evolution reaction Mechanics Condensed Matter Physics Rotation Electrochemical cell Classical mechanics Mass transfer Electrode
Zdroj:	Journal of Mechanics. 19:349-355
ISSN:	1811-8216 1727-7191
DOI:	10.1017/s1727719100003191
Popis:	Electrochemical experiments in microgravity are essential for the optimum design of advanced life support systems and power storage systems in space. In the absence of gravity, the evolved gas bubbles will clog the electrode and slow the reaction. Here, a rotating cell concept is introduced as a plan for improving mass transfer and bubble removal in a microgravity environment. A primary experimental study of bubble behavior in rotating water electrolysis cells has been done in reduced gravity through KC-135 parabolic flight. The results show that the cell resistance decreases with increasing rotation rate. Without rotation, the bubbles stick on the electrode surface during reduced gravity period, thus, the cell efficiency degrades. Mass transfer enhanced by bubble generation is investigated in ground-based work at high rotation rate of test cells, so that gravitational effects are minimized.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::be4d10475aa4a42215b59be1a61a552b https://doi.org/10.1017/s1727719100003191 Zobrazit plný text záznamu