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Title: Method to prevent sulfur accumulation in membrane electrode assembly

Patent ·
OSTI ID:1130082
; ;

A method of operating a hybrid sulfur electrolyzer to generate hydrogen is provided that includes the steps of providing an anolyte with a concentration of sulfur dioxide, and applying a current. During steady state generation of hydrogen a plot of applied current density versus concentration of sulfur dioxide is below a boundary line. The boundary line may be linear and extend through the origin of the graph with a slope of 0.001 in which the current density is measured in mA/cm2 and the concentration of sulfur dioxide is measured in moles of sulfur dioxide per liter of anolyte.

Research Organization:
Savannah River Site (SRS), Aiken, SC (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC09-08SR22470
Assignee:
Savannah River Nuclear Solutions, LLC (Aiken, SC)
Patent Number(s):
8,709,229
Application Number:
12/930,486
OSTI ID:
1130082
Resource Relation:
Patent File Date: 2011 Jan 07
Country of Publication:
United States
Language:
English

References (7)

Method for electrolytic production of hydrogen patent July 1983
Gas phase electrolyzer process for producing hydrogen patent August 2007
Multiple phase SO3/SO2/H2O/H2SO4 electrolyzer patent-application January 2007
Production of Low Temperature Electrolytic Hydrogen patent-application January 2009
Hydrogen Generation Process with Dual Pressure Multi Stage Electrolysis patent-application January 2009
Sulfur dioxide depolarized electrolysis for hydrogen production: Development status journal January 1982
Effect of Water on the Electrochemical Oxidation of Gas-Phase SO[sub 2] in a PEM Electrolyzer for H[sub 2] Production journal January 2007

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY