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Simultaneous Sodium Hydroxide Production by Membrane Electrolysis and Carbon Dioxide Capture
Author(s) -
Yun Haesung,
Kim Young Eun,
Lee Wonhee,
Youn Min Hye,
Jeong Soon Kwan,
Park Ki Tae,
Lee Ki Bong
Publication year - 2017
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201700151
Subject(s) - electrolysis , chemistry , sodium hydroxide , carbon dioxide , electrolyte , aqueous solution , electrochemistry , inorganic chemistry , alkaline water electrolysis , sodium carbonate , yield (engineering) , seawater , sodium , materials science , electrode , metallurgy , organic chemistry , oceanography , geology
The simultaneous process of NaOH production via electrolysis of NaCl and CO 2 capture was investigated due to the expectation of reduction in capital cost. It was found that seawater concentration of NaCl solution was adaptable to be used as both anolyte and catholyte and that 90 °C was the most proper temperature for NaOH production among the test conditions in this work. Under these electrolyte and temperature conditions, the simultaneous NaOH production and CO 2 capture processes were conducted and more than 98.83 % of OH − was reacted with CO 2 to yield aqueous carbonate solutions. Additional electrochemical CO 2 capture tests were carried out depending on the different CO 2 concentration of mixed gases.