Journal
CHEMICAL ENGINEERING JOURNAL
Volume 279, Issue -, Pages 1010-1022Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2015.05.040
Keywords
Supercritical water oxidation; Salt deposition; Solubility; Reactor plugging
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Funding
- National Natural Science Foundation of China [21206132]
- Specialized Research Fund for the Doctoral Program of Higher Education [20120201120069]
- Fundamental Research Funds for the Central Universities [xjj2012032]
- National Science Foundation for Post-doctoral Scientists of China [2013M540748]
- China Postdoctoral Science Foundation [2014T70922]
- Shaanxi Province Postdoctoral Science Foundation
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Supercritical water oxidation (SCWO) is a promising technology that has been utilized to deal with refractory wastewater and sewage sludge at laboratory or commercial scale. However, its commercial application is postponed by corrosion and salt deposition problems in harsh SCWO environment. This work systematically and objectively reviews its current research status concerning salt deposition mainly including research methods, solubilities, deposition and separation performances, etc. and the mechanisms of salt deposition are preliminarily analyzed and summarized. Besides, several operation techniques and reactor configuration designs of either laboratory scale or commercial level used in SCWO processes are introduced to avoid reactor plugging induced by salt deposition. Finally, some subsequently alternative research ideas are proposed to reveal salt deposition mechanisms. A wise SCWO system is supposed to possess an appropriate reactor configuration and more than one control techniques to work together for a given wastewater. (C) 2015 Elsevier B.V. All rights reserved.
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