METHOD OF PREPARATION OF A CO2 REMOVAL SORBENT WITH HIGH CHEMICAL STABILITY DURING MULTIPLE CYCLES
First Claim
1. A method of making a clay-alkali-amine CO2 sorbent comprising:
- supplying a clay substrate;
supplying a basic alkali salt, where the basic alkali salt is supplied at from about 1 part to about 50 parts per 100 parts of the clay substrate by weight;
supplying an amine liquid comprised of an amine, where the amine liquid is supplied at from about 1 part to about 10 parts per 10 parts of a clay-alkali combination by weight, where the clay-alkali combination is a combined proportion of the clay substrate and the basic alkali salt; and
integrating the clay substrate, the basic alkali salt, and the amine liquid, thereby producing the clay-alkali-amine CO2 sorbent.
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Abstract
Method for the production of a clay-alkali-amine CO2 sorbent prepared by integrating a clay substrate, basic alkali salt, and amine liquid. The basic alkali salt is present relative to the clay substrate in a weight ratio of from about 1 part to about 50 parts per 100 parts of the clay substrate. The amine liquid is present relative to a clay-alkali combination in a weight ratio of from about 1 part to about 10 parts per 10 parts of the clay-alkali combination. The clay substrate and basic alkali salt may be combined in a solid-solid heterogeneous mixture and followed by introduction of the amine liquid. Alternatively, an alkaline solution may be blended with the amine solution prior to contacting the clay substrate. The clay-alkali-amine CO2 sorbent is particularly advantageous for low temperature CO2 removal cycles in a gas stream having a CO2 concentration less than around 2000 ppm and an oxygen concentration around 21%, such as air. Results are presented illustrating the performance of the clay-alkali-amine CO2 sorbent compared to a clay-amine sorbent lacking the alkali inclusion.
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Citations
20 Claims
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1. A method of making a clay-alkali-amine CO2 sorbent comprising:
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supplying a clay substrate; supplying a basic alkali salt, where the basic alkali salt is supplied at from about 1 part to about 50 parts per 100 parts of the clay substrate by weight; supplying an amine liquid comprised of an amine, where the amine liquid is supplied at from about 1 part to about 10 parts per 10 parts of a clay-alkali combination by weight, where the clay-alkali combination is a combined proportion of the clay substrate and the basic alkali salt; and integrating the clay substrate, the basic alkali salt, and the amine liquid, thereby producing the clay-alkali-amine CO2 sorbent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of making a clay-alkali-amine CO2 sorbent comprising:
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supplying a clay substrate, where the clay substrate is a plurality of clay substrate granules; supplying a basic alkali salt, where the basic alkali salt is comprised of a metallic cation and an anion where the metallic cation is Na, K, Li, Rb, Cs, Ca, Ba, or Sr and where the anion is hydroxide ion, a carbonate ion, an acetate ion, a phosphate ion, or an oxide ion, and where the basic alkali salt is a plurality of basic alkali salt granules, and where the basic alkali salt is supplied at from about 1 part to about 50 parts per 100 parts of the clay substrate by weight; mixing the plurality of basic alkali salt granules and the plurality of clay substrate granules, thereby generating a solid-solid heterogeneous mixture; adding water to the solid-solid heterogeneous mixture and forming porous clay-alkali pellets, where a mass of the water is less than 50% of a mass of the solid-solid heterogeneous mixture; supplying an amine liquid comprised of an amine, where the amine liquid is supplied at from about 1 part to about 10 parts per 10 parts of a clay-alkali combination by weight, where the clay-alkali combination is a combined proportion of the clay substrate and the basic alkali salt; contacting the porous clay-alkali pellets and the amine liquid and allowing the amine liquid to penetrate some portion of the pores of the porous clay-alkali pellets, thereby producing the clay-alkali-amine CO2 sorbent. - View Dependent Claims (18, 19, 20)
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Specification