METHODS AND SYSTEMS FOR CAPTURING AND STORING CARBON DIOXIDE
First Claim
1. A method of capturing and storing carbon dioxide, said method comprising:
- mixing materials including magnesium or calcium with at least one of one or more acids and chelating agents to form a magnesium or calcium-rich solvent;
generating carbonate ions by reacting a gas including carbon dioxide with a biocatalyst; and
reacting said solvent with said carbonate ions to form magnesium or calcium carbonates.
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Accused Products
Abstract
Methods and systems for capturing and storing carbon dioxide are disclosed. In some embodiments, the methods include the following: mixing materials including magnesium or calcium with one or more acids and chelating agents to form a magnesium or calcium-rich solvent; using the organic acids derived from biogenic wastes as acids or chelating agents; generating carbonate ions by reacting a gas including carbon dioxide with a carbonic anhydrase biocatalyst; reacting the solvent with the carbonate ions to form magnesium or calcium carbonates; recycling a solution containing the biocatalyst after forming magnesium or calcium carbonates for re-use in the generating step; using the magnesium and calcium carbonates as carbon neutral filler materials and using the silica product as green filler materials or inexpensive absorbents.
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20 Claims
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1. A method of capturing and storing carbon dioxide, said method comprising:
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mixing materials including magnesium or calcium with at least one of one or more acids and chelating agents to form a magnesium or calcium-rich solvent; generating carbonate ions by reacting a gas including carbon dioxide with a biocatalyst; and reacting said solvent with said carbonate ions to form magnesium or calcium carbonates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for capturing and storing carbon dioxide, said system comprising:
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a dissolution reactor for mixing materials including magnesium or calcium with at least one of one or more acids and one or more catalysts to form a magnesium or calcium-rich solvent; a first stream including magnesium or calcium in fluid communication with said dissolution reactor; a second stream including at least one of one or more acids and one or more catalysts in fluid communication with said dissolution reactor; a combined biocatalyst and carbonation reactor in fluid communication with said dissolution reactor for reacting a gas including carbon dioxide with a biocatalyst to form carbonate ions and for reacting said carbonate ions with said magnesium or calcium-rich solvent to form magnesium or calcium carbonates; a biocatalyst source stream in fluid communication with said combined biocatalyst and carbonation reactor; a gas source stream, said gas source stream including carbon dioxide, in fluid communication with said combined biocatalyst and carbonation reactor; a magnesium or calcium-rich solvent stream in fluid communication with said dissolution reactor and said combined biocatalyst and carbonation reactor; a magnesium or calcium carbonate product stream exiting said combined biocatalyst and carbonation reactor; a liquid-solid separator to produce silica product, said liquid-solid separator in fluid communication with said dissolution reactor; a heat source in communication with said dissolution reactor, said heat source being configured to heat said dissolution reactor thereby increasing a temperature inside said dissolution reactor; and a control module for controlling said heat source. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method of capturing and storing carbon dioxide, said method comprising:
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mixing materials including magnesium or calcium with one or more acids to form a magnesium or calcium-rich solvent; generating carbonate ions by reacting a gas including carbon dioxide with a carbonic anhydrase biocatalyst; reacting said solvent with said carbonate ions to form magnesium or calcium carbonates; and recycling a solution containing said biocatalyst after forming magnesium or calcium carbonates for re-use in said generating step; wherein said carbonic anhydrase biocatalyst is one of the enzymes Cam or Cab or a whole cell that expresses one of the enzymes Cam or Cab.
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Specification