Electrochemical apparatus to generate hydrogen and sequester carbon dioxide
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United States of America Patent
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Jul 24, 2012
Grant Date -
Oct 9, 2008
app pub date -
Apr 3, 2008
filing date -
Apr 3, 2007
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Abstract
A carbon dioxide negative method of manufacturing renewable hydrogen and trapping carbon dioxide from the air or gas streams is described. Direct current renewable electricity is provided to a water electrolysis apparatus with sufficient voltage to generate hydrogen and hydroxide ions at the cathode, and protons and oxygen at the anode. These products are separated and sequestered and the base is used to trap carbon dioxide from the air or gas streams as bicarbonate or carbonate salts. These carbonate salts, hydrogen, and trapped carbon dioxide in turn can be combined in a variety of chemical and electrochemical processes to create valuable carbon-based materials made from atmospheric carbon dioxide. The net effect of all processes is the generation of renewable hydrogen from water and a reduction of carbon dioxide in the atmosphere or in gas destined to enter the atmosphere.
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