Compound including oxalate, carbon dioxide absorbent including the same, method of preparing carbon dioxide absorbent and method of removing carbon dioxide

Patent metadata

Field	Value
Publication number	US-2015056114-A1
Application number	US-201314140063-A
Country	US
Kind code	A1
Filing date	Dec 24, 2013
Priority date	Aug 21, 2013
Publication date	Feb 26, 2015
Grant date	—

Abstract

Disclosed are a compound including an oxalate, a carbon dioxide absorbent including the same, a method of preparing the carbon dioxide absorbent and a method of removing carbon dioxide, which may overcome issues of high recycling energy and low absorptivity of a conventional carbon dioxide absorbent to considerably reduce recycling energy and absorb a greater amount of carbon dioxide per unit absorbent, so that a size of a carbon dioxide absorption tower may be reduced and a less amount of recycling energy may be used, contributing to a substantial decrease in device manufacture costs and management costs.

First claim

What is claimed is:

1 . A compound comprising:
a divalent metal ion; an oxalate; and an amine ligand.

2 . The compound of claim 1 , wherein the compound is represented by Formula 1 or Formula 2:

where M 2+ is the divalent metal ion and R is independently H or CH 3 .

3 . The compound of claim 1 , wherein the divalent metal ion comprises at least one selected from the group consisting of magnesium, calcium, nickel, zinc, strontium, barium, iron, copper, cobalt, lead and manganese.

4 . The compound of claim 1 , wherein the amine ligand comprises at least one selected from the group consisting of monoethanolamine (MEA), diethanolamine (DEA), triethanolamine, methylmonoethanolamine, methyldiethanolamine, dimethylmonoethanolamine, diethylmonoethanolamine, monoisopropanolamine, diisopropanolamine, triethylenetetramine, N,N′-Bis(3-aminopropyl)ethylenediamine, piperazine, 1-methylpiperazine, 2-methylpiperazine, dimethylpiperazine, 1-ethylpiperazine, 1-(2-aminoethyl)piperazine, 1-(2-hydroxyethyl)piperazine, 2-piperidinemethanol, 2-piperidineethanol, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-butanol, 2-amino-2-ethyl-1-propanediol 3-aminopropanol, 2-ehtylaminoethanol, 2-methylaminoethanol and 2-diethylaminoethanol.

5 . The compound of claim 1 , wherein the divalent metal ion is present, in the compound, in an amount of 10% by weight (wt %) to 50 wt %.

6 . The compound of claim 1 , wherein the oxalate is present, in the compound, in an amount of 45 wt % to 70 wt %.

7 . The compound of claim 1 , wherein the amine ligand is present, in the compound, in an amount of 35 wt % to 60 wt %.

8 . A carbon dioxide absorbent comprising:
the compound of any one of claims 1 to 7 ; and an organic solvent.

9 . The carbon dioxide absorbent of claim 8 , wherein the organic solvent comprises at least one selected from the group consisting of ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, diethylene glycol, dipropylene glycol and triethylene glycol.

10 . A method of preparing a carbon dioxide absorbent, the method comprising:
preparing a compound comprising a divalent metal ion, an oxalate and an amine ligand; and mixing the compound and an organic solvent.

11 . The method of claim 10 , wherein the divalent metal ion comprises at least one selected from the group consisting of magnesium, calcium, nickel, zinc, strontium, barium, iron, copper, cobalt, lead and manganese.

12 . The method of claim 10 , wherein the amine ligand comprises at least one selected from the group consisting of monoethanolamine (MEA), diethanolamine (DEA), triethanolamine, methylmonoethanolamine, methyldiethanolamine, dimethylmonoethanolamine, diethylmonoethanolamine, monoisopropanolamine, diisopropanolamine, triethylenetetramine, N,N′-Bis(3-aminopropyl)ethylenediamine, piperazine, 1-methylpiperazine, 2-methylpiperazine, dimethylpiperazine, 1-ethylpiperazine, 1-(2-aminoethyl)piperazine, 1-(2-hydroxyethyl)piperazine, 2-piperidinemethanol, 2-piperidineethanol, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-butanol, 2-amino-2-ethyl-1-propanediol 3-aminopropanol, 2-ehtylaminoethanol, 2-methylaminoethanol and 2-diethylaminoethanol.

13 . A method of removing carbon dioxide, the method comprising:
bringing a gas comprising carbon dioxide into contact with a carbon dioxide absorbent comprising a compound comprising a divalent metal ion, an oxalate and an amine ligand and an organic solvent; absorbing carbon dioxide from the gas; and recycling the carbon dioxide absorbent.

14 . The method of claim 13 , wherein the absorbing of the carbon dioxide is carried out at a pressure in a range of atmospheric pressure to 10 atmospheres (atm), and at a temperature in a range of room temperature to 70° C.

15 . The method of claim 13 , wherein the recycling of the carbon dioxide absorbent is carried out at a pressure in a range of atmospheric pressure to 5 atm, and at a temperature in a range of 80° C. to 150° C.

Assignees

• Korea Energy Research Inst

Inventors

• Jeong Soon Kwan
• Yoon Yeo Ii
• Nam Sung Chan
• Choi Soo Hyun
• Yoon Sung Ho
• Kim Nam Seok
• Joo Bon Sik

Classifications

• B01D53/62 Primary

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• Y02A50/20

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• B01D2258/0283

  Flue gases · CPC title

• B01D53/1475

  Removing carbon dioxide · CPC title