Carbon dioxide absorbent for exhaust gas, and preparation method thereof
First Claim
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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Abstract
A CO2 absorbent for exhaust gas capable of being repeatedly used in capturing and recycling of CO2 is provided. The CO2 absorbent for exhaust gas capturing CO2 included in exhaust gas is composed of solid materials including 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 %. The CO2 absorbent for exhaust gas having such a composition meets the requirements for processes, including physical properties such as a spherical shape, an average particle size and size distribution, a tap density and attrition resistance, and has excellent CO2 absorbing capability and recycling capability.
The carbon dioxide absorbent for exhaust gas satisfies physical characteristics such as spherical shape, average particle size and size distribution, tap density, attrition resistance and the like required for processes, and has excellent CO2 absorption and recycling capabilities.
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Citations
13 Claims
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1. A method of preparing a CO2 absorbent for exhaust gas, comprising:
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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, and wherein the absorbent material molded in the preparation of the final absorbent has a recycling capability of 70 to 100%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification