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Title: Superior membrane distillation by induction heating of 3D rGO/Nafion/Ni foam for water treatment
Authors: Pan, Meilan
Tan, Yong Zen
Chew, Jia Wei
Keywords: Engineering::Chemical engineering
Issue Date: 2020
Source: Pan, M., Tan, Y. Z. & Chew, J. W. (2020). Superior membrane distillation by induction heating of 3D rGO/Nafion/Ni foam for water treatment. Journal of Membrane Science, 616, 118609-.
Project: 2019-T1-002-065
Journal: Journal of Membrane Science
Abstract: Membrane distillation (MD) is a promising green technology that can harness waste or solar heat to treat water. Since such heat sources suffer from temporal variations, a complementary, efficient means is necessary. Induction heating is attractive in providing localized heating at the feed-membrane interface where the heat matters, but the typical conductive materials (e.g., metal, alloy) corrode readily in the high-salinity, high-temperature environment. In this work, a superior induction material was proposed, namely, reduced graphene oxides (rGO) coated onto a porous Nickel foam by Nafion (rGO/Nafion/Ni), which exhibited superior and sustained performance for membrane distillation. Results indicate that rGO/Nafion/Ni achieved up to 28.1% higher water flux (6.42 ± 0.36 Lm−2h−1) and 37.5% lower energy consumption (3.13 kWhL−1) compared to other carbon materials coated on Ni or the bare Ni foam. The mechanism underlying the enhanced MD performance was the higher absorption of the electromagnetic waves via multiple internal reflections and larger eddy currents generated by rGO, leading to higher temperatures at the feed-membrane interface that increased the driving force for distillation and thereby the energy efficiency of MD. Our work demonstrated that the induction heating of rGO has high potential for augmenting MD performance in water treatment.
ISSN: 0376-7388
DOI: 10.1016/j.memsci.2020.118609
Schools: School of Chemical and Biomedical Engineering 
Research Centres: Nanyang Environment and Water Research Institute 
Singapore Membrane Technology Centre 
Rights: © 2020 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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