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Carbon dioxide absorbent for exhaust gas, and preparation method thereof

  • US 9,138,682 B2
  • Filed: 10/30/2009
  • Issued: 09/22/2015
  • Est. Priority Date: 10/30/2009
  • Status: Active Grant
First Claim
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1. A method of preparing a CO2 absorbent for exhaust gas, comprising:

  • preparing a slurry using solid materials comprising an active component at 5 to 70 wt %, a support at 5 to 70 wt %, an inorganic binder at 5 to 70 wt % and a recycling improver at 5 to 70 wt %, based on the total weight of the slurry;

    primarily preparing an absorbent by drying the prepared slurry in a spray drier; and

    preparing a final absorbent by drying and calcinating the primarily prepared absorbent,wherein the active component is potassium carbonate or potassium bicarbonate,wherein the support is alumina,wherein the inorganic binder is cement, clay, or ceramic,wherein the recycling improver is hydrotalcite, andwherein the absorbent material molded in the preparation of the final absorbent has a recycling capability of 70 to 100%.

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