journal article Nov 23, 2022

Current challenges in hydrate‐based desalination: Kinetic and thermodynamic perspective

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Abstract
Abstract
Water scarcity is becoming a severe problem worldwide due to inadequate freshwater resources and swift population growth. Seawater desalination is one of the vital approaches to meet the demand for freshwater. However, energy and associated costs with conventional seawater desalination techniques are incentivizing non‐conventional water desalination processes. Water desalination using gas hydrates formation is one of the emerging non‐conventional processes. In this perspective article, recent advances in hydrate‐based seawater desalination (HBSD) have been critically analyzed to outline a future path towards a clean and efficient hydrate‐based desalination process. It provides a detailed comparison of various processes developed over decades, and measured desalination efficiencies with their process details. Moreover, the current challenges, limitations, and future perspectives of hydrate‐based desalination are also discussed. The study also recapitulates the thermodynamics and kinetics aspects of the hydrate‐based desalination process. In addition, various factors controlling the desalination efficiencies, such as control of the separation of hydrate crystals, salt deposition on hydrate particles, and hydrate morphology, were thoroughly investigated with their proposed process designs. The kinetics of hydrate formation is also assessed, with the possibility of a zero‐induction regime and its consequent impact on hydrate morphology. The current capabilities of the thermodynamics models (Gibbs energy minimization + electrolyte equation of state) were discussed using various commercially available software. Additionally, the role of hydrate promotors is also discussed, which can reduce the higher cost associated with the hydrate‐based desalination process.
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Details
Published
Nov 23, 2022
Vol/Issue
101(2)
Pages
681-695
License
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Funding
U.S. Department of Energy Award: DE‐FOA‐0002414
Cite This Article
Muhammad Naveed Khan, Hongfei Xu, Cornelis J. Peters, et al. (2022). Current challenges in hydrate‐based desalination: Kinetic and thermodynamic perspective. The Canadian Journal of Chemical Engineering, 101(2), 681-695. https://doi.org/10.1002/cjce.24599