TY - JOUR
T1 - Novel membrane modifications for pressure retarded osmosis as a new way for sustainable power generation from salinity gradients
AU - Malankowska, Magdalena
AU - Su, Ziran
AU - Karlsen, Klaus
AU - Flaskjær Buhl, Martin
AU - Guo, Haofei
AU - Pedersen, Lars Storm
AU - Pinelo, Manuel
PY - 2024
Y1 - 2024
N2 - Pressure retarded osmosis (PRO) is a novel technology that allows power
to be generated from high-salinity resources. To achieve a high power
density, a high-salinity solution should be used on the draw side
together with high hydraulic pressure, thus the PRO process requires a
membrane that has high salt rejection and high pressure resistance. The
reverse osmosis (RO) membranes can be potential candidates for the PRO
process. In this study, commercial RO membranes with different surface
modifications were examined: O2 plasma, polydopamine (PDA)
and tannic acid (TA). Improved water permeability and salt rejection
were obtained after modification. The membranes were also tested with a
high salinity solution (175 g/L NaCl) in a PRO mode. Due to the improved
water permeability and high salt rejection of the surface-modified
membrane, the commercial RO membrane showed enhanced power density
(3 W/m2) in comparison to the pristine membrane (2 W/m2).
AB - Pressure retarded osmosis (PRO) is a novel technology that allows power
to be generated from high-salinity resources. To achieve a high power
density, a high-salinity solution should be used on the draw side
together with high hydraulic pressure, thus the PRO process requires a
membrane that has high salt rejection and high pressure resistance. The
reverse osmosis (RO) membranes can be potential candidates for the PRO
process. In this study, commercial RO membranes with different surface
modifications were examined: O2 plasma, polydopamine (PDA)
and tannic acid (TA). Improved water permeability and salt rejection
were obtained after modification. The membranes were also tested with a
high salinity solution (175 g/L NaCl) in a PRO mode. Due to the improved
water permeability and high salt rejection of the surface-modified
membrane, the commercial RO membrane showed enhanced power density
(3 W/m2) in comparison to the pristine membrane (2 W/m2).
KW - Membrane modification
KW - O2 plasma
KW - Polydopamine
KW - Pressure retarded osmosis
KW - Tannic acid
U2 - 10.1016/j.ces.2024.120221
DO - 10.1016/j.ces.2024.120221
M3 - Journal article
SN - 0009-2509
VL - 297
JO - Chemical Engineering Science
JF - Chemical Engineering Science
M1 - 120221
ER -