Geometric Optimization of an Electrochemical Purification Cell to Prevent Corrosion in CSP Plants During Operation: Preprint

Kerry Rippy, Liam Witteman, Abigail Monestarial, Patrick Taylor, Judith Vidal

Research output: Contribution to conferencePaper

Abstract

When exposed to moisture or oxygen, molten chloride salts produce corrosive impurities which degrade containment alloys. This can significantly decrease the lifetime and increase costs of molten-salt-based systems. To overcome this barrier, we designed and modeled an electrochemical purification cell to remove the corrosive impurity MgOH+. Various reactor architectures, including constant stirred tank reactors (CSTRs) and plug flow reactors (PFRs) were investigated. Steady-state thermoelectric properties were evaluated, allowing assessment of the effects of structure and design parameters such as flow rate, cell length, and cross-sectional area of molten salt. The results suggest that our design could most effectively increase reliability and decrease costs of molten-chloride-salt-based systems by protecting them during continuous operation using an annular plug flow reactor.
Original languageAmerican English
Number of pages11
StatePublished - 2022
EventSolarPACES 2021 -
Duration: 27 Sep 20211 Oct 2021

Conference

ConferenceSolarPACES 2021
Period27/09/211/10/21

NREL Publication Number

  • NREL/CP-5500-80088

Keywords

  • analytical modeling
  • corrosion
  • CSP
  • electrochemical purification
  • molten chloride salts

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