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New Guide for Water quality guidelines for makeup and recirculating waters used in electrolyzers for hydrogen production
1. Scope
The objective of this working group is to develop a water quality standard guide when operating various types of water electrolyzers to produce hydrogen gas. The guide is expected to provide (i) recommended maximum water impurity levels; (ii) typical methods and systems to purify water that enable conformance and (iii) standard analytical test methods that can be used to validate the conformance. The guide will provide recommendations for limits on both “exogenous” impurities coming from incoming water fed to electrolyzers, and “endogenous” impurities that may be extracted during electrolyzer operation from wetted cell components. Electrolyzer types will include proton exchange, anion exchange, bipolar exchange, solid oxide, and alkaline.
Keywords
recommended maximum water impurity levels; (ii) typical methods and systems to purify water that enable conformance and (iii) standard analytical test methods that can be used to validate the conformance. The guide will provide recommendations for limits on both “exogenous” impurities coming from incoming water fed to electrolyzers, and “endogenous” impurities that may be extracted during electrolyzer operation from wetted cell components. Electrolyzer types will include proton exchange, anion exchange, bipolar exchange, solid oxide, and alkaline.
Rationale
The objective of this working group is to develop a water quality standard guide when operating various types of water electrolyzers to produce hydrogen gas.
