TY - JOUR
T1 - Concentration of aqueous hydrogen peroxide solution by pervaporation
AU - Roy, Sagar
AU - Thongsukmak, Atsawin
AU - Tang, John
AU - Sirkar, Kamalesh K.
N1 - Funding Information:
This work was supported by contract 2007-ARM796-0001 of US Dept. of The Army/Lynntech, Inc. We would like to acknowledge considerable assistance provided by Christopher Rhodes, Anthony Gilleto, John Lund and Charles Tennakoon of Lynntech. Qing Hua Li participated in the development of the experimental set up.
PY - 2012/2/1
Y1 - 2012/2/1
N2 - Pervaporative separation of corrosive liquids is always challenging in terms of finding a suitable polymeric membrane that can withstand the harsh environment especially when concentrating an aqueous solution of a highly oxidizing liquid such as hydrogen peroxide (H 2O 2). H 2O 2 is one of the most powerful oxidizers known and is a stronger oxidant than chlorine, chlorine dioxide and potassium permanganate; hydroxyl radical (OH) generated from H 2O 2 has a very high reactivity. The choice of membrane material is potentially limited to fluoro polymers and perfluoro polymers considering membrane stability in such a harsh system. Perfluorodimethyldioxole-tetrafluoroethylene (PDD-TFE) copolymer membranes (CMS-3 and CMS-7) were used to concentrate hydrogen peroxide from its aqueous solutions. The feed solution composition was varied between 4 and ~40wt% H 2O 2; the process was studied at 25°C, 30°C and 35°C. CMS-7 displayed a higher flux than CMS-3; a reverse trend was observed for water-H 2O 2 selectivity for the same feed concentration. The highest water-H 2O 2 selectivity of ~12 was observed in CMS-3 membrane at an H 2O 2 concentration of 43wt% with a total flux of 6.15×10 -3g/hcm 2; for CMS-7, values of 9.2 and 9.6×10 -3g/hcm 2 were found for water-H 2O 2 selectivity and total flux, respectively, at the same H 2O 2 concentration. The total permeated flux increased with temperature at the cost of selectivity for both membranes. Extended-term behaviors of CMS-3 and CMS-7 membranes studied at 35wt% H 2O 2 concentration indicated that both are quite stable for tests carried out over periods of 162 and 145 days respectively.
AB - Pervaporative separation of corrosive liquids is always challenging in terms of finding a suitable polymeric membrane that can withstand the harsh environment especially when concentrating an aqueous solution of a highly oxidizing liquid such as hydrogen peroxide (H 2O 2). H 2O 2 is one of the most powerful oxidizers known and is a stronger oxidant than chlorine, chlorine dioxide and potassium permanganate; hydroxyl radical (OH) generated from H 2O 2 has a very high reactivity. The choice of membrane material is potentially limited to fluoro polymers and perfluoro polymers considering membrane stability in such a harsh system. Perfluorodimethyldioxole-tetrafluoroethylene (PDD-TFE) copolymer membranes (CMS-3 and CMS-7) were used to concentrate hydrogen peroxide from its aqueous solutions. The feed solution composition was varied between 4 and ~40wt% H 2O 2; the process was studied at 25°C, 30°C and 35°C. CMS-7 displayed a higher flux than CMS-3; a reverse trend was observed for water-H 2O 2 selectivity for the same feed concentration. The highest water-H 2O 2 selectivity of ~12 was observed in CMS-3 membrane at an H 2O 2 concentration of 43wt% with a total flux of 6.15×10 -3g/hcm 2; for CMS-7, values of 9.2 and 9.6×10 -3g/hcm 2 were found for water-H 2O 2 selectivity and total flux, respectively, at the same H 2O 2 concentration. The total permeated flux increased with temperature at the cost of selectivity for both membranes. Extended-term behaviors of CMS-3 and CMS-7 membranes studied at 35wt% H 2O 2 concentration indicated that both are quite stable for tests carried out over periods of 162 and 145 days respectively.
KW - Hydrogen peroxide concentration
KW - Membrane selectivity
KW - PDD-TFE copolymer membranes
KW - Pervaporation
KW - Stability
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U2 - 10.1016/j.memsci.2011.09.046
DO - 10.1016/j.memsci.2011.09.046
M3 - Article
AN - SCOPUS:83855162780
SN - 0376-7388
VL - 389
SP - 17
EP - 24
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -