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CO 2 -sequestering formed building materials

  • US 8,431,100 B2
  • Filed: 07/26/2011
  • Issued: 04/30/2013
  • Est. Priority Date: 09/30/2008
  • Status: Active Grant
First Claim
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1. A method for producing a formed building material comprising:

  • a) contacting a gaseous waste stream comprising a CO2 with water comprising proton removing agent to form a CO2 charged water;

    b) producing a CO2-sequestering component from a saltwater solution of divalent cations and the CO2 charged water under one or more of precipitation conditions favoring precipitation of the CO2-sequestering component comprising a metastable carbonate comprising amorphous calcium carbonate, vaterite, aragonite, or combinations thereof; and

    c) forming the formed building material from the CO2-sequestering component in a process comprising contacting the CO2-sequestering component with water, wherein the formed building material is selected from the group consisting ofa) a brick having a compressive strength ranging from 5 to 100 MPa;

    b) a block having a compressive strength ranging from 5 to 100 MPa;

    c) a tile having a compressive strength ranging from 5 to 75 MPa;

    d) a cement board having a compressive strength ranging from 5 to 50 MPa;

    e) a drywall having a compressive strength ranging from 1 to 20 MPa;

    f) a conduit having a compressive strength ranging from 5 to 75 MPa;

    g) a beams having a compressive strength ranging from 35 to 150 MPa;

    h) a basin having a compressive strength ranging from 5 to 60 MPa;

    i) a column having a compressive strength ranging from 25 to 200 MPa;

    j) a fiber-cement siding having a compressive strength ranging from 2 to 25 MPa;

    k) a slab having a compressive strength ranging from 10 to 100 MPa;

    l) acoustic barrier of at least 0.5 m in length; and

    m) insulation material.

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