TY - JOUR
T1 - Nanoparticle filtration through microporous ECTFE membrane in an alcoholic solution
AU - Yao, Na
AU - Khusid, Boris
AU - Sirkar, Kamalesh K.
AU - Dehn, Derek J.
N1 - Funding Information:
The authors gratefully acknowledge support for this research from the NSF Industry/University Cooperative Research Center for Membrane Science, Engineering and Technology that has been supported via NSF Award IIP1034710 . We are grateful to Prof. Wen Zhang (NJIT) for sharing the instrument for particles size distribution measurement. Special thanks are due to Prof. Costas G. Gogos (NJIT) for constructive feedbacks. Na Yao was supported by NJIT during Fall 2016 - Fall 2017.
Funding Information:
The authors gratefully acknowledge support for this research from the NSF Industry/University Cooperative Research Center for Membrane Science, Engineering and Technology that has been supported via NSF Award IIP1034710. We are grateful to Prof. Wen Zhang (NJIT) for sharing the instrument for particles size distribution measurement. Special thanks are due to Prof. Costas G. Gogos (NJIT) for constructive feedbacks. Na Yao was supported by NJIT during Fall 2016 - Fall 2017.
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/2/8
Y1 - 2019/2/8
N2 - Organic solvent filtration is an important industrial process. It is widely used in pharmaceutical manufacturing, chemical processing industry, semiconductor industry, auto assembly etc. Most of the particle filtration studies reported in open literature dealt with aqueous suspension medium. The current work has initiated a study of cross-flow solvent filtration behavior of microporous ethylene chlorotrifluoroethylene (ECTFE) membranes using 12 nm silica nanoparticles suspended in an aqueous solution containing 25% ethanol. In the constant pressure mode of operation of cross-flow microfiltration (MF), permeate samples were collected at different time intervals. The permeate particle size distribution (PSD) results for different experiments were identical. Particle agglomerates having less than 100 nm size can pass through the membrane; some fouling was observed. The governing fouling mechanisms for tests operated using 3.8 × 10−3 kg/m3 (3.8 ppm) at 6.9 × 103 Pag and 1.4 × 104 Pag were pore blocking. For tests conducted using 3.8 × 10−3 kg/m3 (3.8 ppm) at 27.6 × 103 Pag (4 psig) and 1.9 × 10−3 kg/m3 (1.9 ppm) at 6.9 × 103, 13.8 × 103 and 27.6 × 103 Pag (1, 2 and 4 psig), the mechanism was membrane resistance control. Less particles got embedded in membrane pores in experiments operated using suspensions with lower or higher particle concentrations with a higher transmembrane pressure. This is in good agreement with the values of the shear rate in the pore flow and scanning electron microscope images of the membrane after MF. In the dead-end mode of operation of solvent filtration using methanol, ethanol and 2-propanol, the permeate flux behavior follows Jmethanol > Jethanol > J2-propanol at all testing pressures. The values of permeance (kg/m2-s-Pa) determined from the slope of the linear plot of filtration flux vs. the applied pressure difference across the membrane, were 3.9 × 10−4, 2.3 × 10−4 and 3.0 × 10−5 for methanol, ethanol and 2-propanol, respectively. Further exploration was made on solvent sorption results reported earlier. The critical temperature of selected solvents shows a better correlation with solvent sorption rather than the solubility parameter.
AB - Organic solvent filtration is an important industrial process. It is widely used in pharmaceutical manufacturing, chemical processing industry, semiconductor industry, auto assembly etc. Most of the particle filtration studies reported in open literature dealt with aqueous suspension medium. The current work has initiated a study of cross-flow solvent filtration behavior of microporous ethylene chlorotrifluoroethylene (ECTFE) membranes using 12 nm silica nanoparticles suspended in an aqueous solution containing 25% ethanol. In the constant pressure mode of operation of cross-flow microfiltration (MF), permeate samples were collected at different time intervals. The permeate particle size distribution (PSD) results for different experiments were identical. Particle agglomerates having less than 100 nm size can pass through the membrane; some fouling was observed. The governing fouling mechanisms for tests operated using 3.8 × 10−3 kg/m3 (3.8 ppm) at 6.9 × 103 Pag and 1.4 × 104 Pag were pore blocking. For tests conducted using 3.8 × 10−3 kg/m3 (3.8 ppm) at 27.6 × 103 Pag (4 psig) and 1.9 × 10−3 kg/m3 (1.9 ppm) at 6.9 × 103, 13.8 × 103 and 27.6 × 103 Pag (1, 2 and 4 psig), the mechanism was membrane resistance control. Less particles got embedded in membrane pores in experiments operated using suspensions with lower or higher particle concentrations with a higher transmembrane pressure. This is in good agreement with the values of the shear rate in the pore flow and scanning electron microscope images of the membrane after MF. In the dead-end mode of operation of solvent filtration using methanol, ethanol and 2-propanol, the permeate flux behavior follows Jmethanol > Jethanol > J2-propanol at all testing pressures. The values of permeance (kg/m2-s-Pa) determined from the slope of the linear plot of filtration flux vs. the applied pressure difference across the membrane, were 3.9 × 10−4, 2.3 × 10−4 and 3.0 × 10−5 for methanol, ethanol and 2-propanol, respectively. Further exploration was made on solvent sorption results reported earlier. The critical temperature of selected solvents shows a better correlation with solvent sorption rather than the solubility parameter.
KW - Alcoholic solution
KW - Cross-flow microfiltration of silica nanoparticles
KW - ECTFE membrane
KW - Fouling mechanisms
KW - Solvent resistant membrane
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U2 - 10.1016/j.seppur.2018.08.022
DO - 10.1016/j.seppur.2018.08.022
M3 - Article
AN - SCOPUS:85052849186
SN - 1383-5866
VL - 210
SP - 754
EP - 763
JO - Separation and Purification Technology
JF - Separation and Purification Technology
ER -