Ultrapure water production is vital for sustainable green hydrogen production by electrolysis. The current industrial process to generate ultrapure water involves energy-intensive processes, such as reverse osmosis. This study demonstrates a facile method to produce ultrapure water from simulated seawater using a low capital cost and low-energy-consuming membrane distillation (MD) approach that is driven by the waste heat from photovoltaic (PV) panels. To optimize the PV-MD operation, modeling efforts to design a multilayered MD system were carried out. The results were used to guide the construction of several prototype devices using different materials. The best performing PV-MD device, containing evaporation and condensation regions made from steel sheets and polytetrafluoroethylene (PTFE) membranes, can produce high-purity water with conductivity less than 40 mS and flux higher than 100 g/m2 h, which is suitable for typical electrolyzer use.
Bibliographical noteKAUST Repository Item: Exported on 2023-08-07
Acknowledgements: This work was financially supported by the Office of Naval Research through a joint grant to Stony Brook University and University of Massachusetts at Lowell (SBU-UML-ONR: N00014-22-1-2001 and N00014-23-1-2124).
ASJC Scopus subject areas
- Computer Science(all)