Carbon dioxide sequestration with magnesium hydroxide and regeneration of magnesium hydroxide
AssigneeCarbonfree Chemicals Holdings, LLC
InventorsJoe Jones, Al Yablonsky
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Abstract
Embodiments of the present disclosure are directed to systems and methods of removing carbon dioxide from a gaseous stream using magnesium hydroxide and then regenerating the magnesium hydroxide. In some embodiments, the systems and methods can further comprise using the waste heat from one or more gas streams to provide some or all of the heat needed to drive the reactions. In some embodiments, magnesium chloride is primarily in the form of magnesium chloride dihydrate and is fed to a decomposition reactor to generate magnesium hydroxychloride, which is in turn fed to a second decomposition reactor to generate magnesium hydroxide.
Claims11
A method for producing magnesium hydroxide from magnesium chloride-containing material comprising:
- a first stage comprising the steps of introducing said magnesium chloride-containing material into a first reactor, passing a steam mixture into the first reactor with the magnesium chloride-containing material at the approximate temperature of 250 to 400° C., to form magnesium hydroxychloride and HCl, and
- a second stage of conveying the magnesium hydroxychloride into a second reactor, introducing therewith steam to form magnesium hydroxide and HCl,
- where the magnesium chloride-containing material comprises a water to magnesium chloride ratio of about 2:1.
Dependencies are inferred from the claim text.