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Method and means for capture and long-term sequestration of carbon dioxide

  • US 20090081096A1
  • Filed: 11/24/2008
  • Published: 03/26/2009
  • Est. Priority Date: 03/28/2007
  • Status: Abandoned Application
First Claim
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1. A method of capturing and sequestering gaseous carbon dioxide (CO2) from a mixed gas stream, wherein a reaction chamber is utilized and a mesh panel assembly in said reaction chamber has a plurality of mesh openings, comprising the steps:

  • continuously saturating said mesh assembly, having a plurality of mesh panels, with a solution containing calcium ions (Ca++) and hydroxide ions (OH−

    ),passing said gas stream, having gaseous CO2, through said saturated mesh assembly to form an aqueous froth wherein the bubbles of said froth have their interior volumes filled with said mixed gasescausing at least some of said bubbles to burst and reform, said bursting bubbles forming numerous micro-droplets having various radii, wherein each reforming bubble encapsulates a discrete volume of said gas stream, a discrete number of said solution micro-droplets, and a discrete volume of solution vapor,limiting the size of said bubbles formed in said aqueous froth by limiting the size of the openings in said mesh panels, and thereby forming a myriad of uniformly small bubbles, thereby maximizing the contact between said CO2 molecules, said micro-droplets, and the inner and outer surfaces of said myriad of small bubbles,cooling said solution before it flows through said saturated mesh panels and cooling said gas inside said bubbles as the bubbles moves downwardly through said reaction chamber,causing said aqueous froth and said gas stream to move together downwardly through said reaction chamber to increase the reaction time between said gas stream and said myriad of bubbles, and to increase the pressure of said aqueous froth, thereby decreasing the size of said bubbles and increasing solubility of CO2 molecules into said solution,minimizing the mean free path of CO2 molecules inside said bubbles by decreasing the volume of said bubbles to reduce the distance between said inner surfaces of each bubble and said micro-droplets inside each bubble, thereby maximizing contact between said CO2 molecules and said solution used to form said bubbles and said micro-droplets,capturing CO2 molecules carried in said solution by the reaction of said CO2 molecules with said calcium ions (Ca++) and hydroxide ions (OH−

    ) in said solution to form calcium carbonate (CaCO3) molecules, andprecipitating said calcium carbonate out of said solution.

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