Using RuO(2) anode for chlorine dioxide production in an un-divided electrochemical cell.
Chlorine dioxide is a well known powerful disinfectant. Although there are several chemical and electrochemical methods developed for on-line chlorine dioxide generation, the details are mostly confined as patents. We studied in this work the electrochemical generation of dissolved chlorine dioxide from an un-buffered solution of sodium chlorite and sodium chloride mixture in an un-divided electrochemical cell set-up with RuO(2)-coated-Ti anode and Pt-coated-Ti cathode under constant current mode. Various process parameters including feed flow rate (10 to 150 ml/min), feed solution pH (2.3 to 9.4), concentration of sodium chloride (0 to 170 mM), concentration of sodium chlorite (0 to 7.7 mM), and the applied current (100 to 1,200 mA) were optimized. Experiments were conducted by performing single pass experiments, with no circulation. The current efficiency and the power consumption were calculated for the optimized conditions, and compared with IrO(2) electrode of our previous investigation.
Chandrasekara Pillai
K
K
Department of Chemical Engineering, Sunchon National University, # 315 Maegok Dong, Suncheon 540-742, Chonnam, Korea. kc_pillai@yahoo.com
Kwon
Tae Ok
TO
Park
Bo Bae
BB
Moon
Il Shik
IS
D002712:Chlorides / Q000737:chemistry; D017606:Chlorine Compounds / Q000138:chemical synthesis*; D004202:Disinfectants / Q000138:chemical synthesis; D055664:Electrochemical Techniques; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D007495:Iridium / Q000737:chemistry; D010087:Oxides / Q000138:chemical synthesis*; D012413:Rubidium / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry
D002712:Chlorides; D017606:Chlorine Compounds; D004202:Disinfectants; D010087:Oxides; C044458:iridium oxide; D007495:Iridium; D012965:Sodium Chloride; C025109:chlorine dioxide; D012413:Rubidium; C001599:chlorite