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Carbon dioxide collection method

A technology of carbon dioxide and carbon number, applied in the field of carbon dioxide collection for capturing carbon dioxide, it can solve the problems of non-regeneration and continuous use, molecular sieve stuck, etc., to achieve the effect of being environmentally friendly and avoiding procedures and costs

Inactive Publication Date: 2019-12-06
陈志勇
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The said Chinese patent publication is because the molecular sieve is a porous material, and the above-mentioned basic cations need to be transferred into the pores of the molecular sieve, and it takes a lot of time for the carbon dioxide gas to diffuse into the molecular sieve to react with the basic cations when absorbing carbon dioxide. It will also produce solid precipitation, which will block the molecular sieve and make it impossible to regenerate and continue to use

Method used

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Examples

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Effect test

Embodiment 1

[0028] [Example 1] Carbon dioxide collection method

[0029] In an environment of atmospheric pressure and 29°C, pass carbon dioxide gas into the aqueous solution of the capture agent [composed of 39.26 grams (0.4 mol) of potassium acetate and 20 grams of water, with a mass molar concentration of 20 mol / kg (equivalent to a volume molar concentration of 8.81 M), the pH value is 10.41], and reacted for 80 minutes to obtain an aqueous capture agent solution (pH value is 7.55) that has captured carbon dioxide. In the aqueous capture agent solution, the carbon dioxide capture amount per mole of potassium acetate is 0.273 moles, which is equal to 2.396 moles of carbon dioxide capture amount per liter of the aqueous capture agent solution. The conversion process is as follows:

[0030] (1) 0.273mol CO 2 / 1mol potassium acetate, after converting the molar mass of potassium acetate 98.15g / mol = 0.273mol CO 2 / 98.15g potassium acetate;

[0031] (2) 98.15g of potassium acetate is 2.5 ...

Embodiment 2

[0035] [Example 2] Carbon dioxide collection method

[0036] At atmospheric pressure and an environment of 29°C, pass carbon dioxide gas into the aqueous solution of the capture agent [composed of 39.26 grams (0.4 mol) of potassium acetate and 26.6 grams of water, with a mass molar concentration of 15 mol / kg (equal to a volume molar concentration of 7.28 M), the pH value is 10.03], and reacted for 80 minutes to obtain an aqueous capture agent solution (pH value is 7.58) that has captured carbon dioxide. In the aqueous capture agent solution, the carbon dioxide capture amount per mole of potassium acetate is 0.142 moles, which is equal to 1.03 moles of carbon dioxide capture amount per liter of the aqueous capture agent solution. The conversion process is as follows:

[0037] (1) 0.142mol CO 2 / 1mol of potassium acetate, after converting the molar mass of potassium acetate of 98.15g / mol = 0.142mol CO 2 / 98.15g potassium acetate;

[0038] (2) 98.15 g of potassium acetate is 2.5...

Embodiment 3

[0040] [Example 3] Carbon dioxide collection method

[0041] In an environment of atmospheric pressure and 29°C, pass carbon dioxide gas into the aqueous solution of the capture agent [composed of 39.26 grams (0.4 mol) of potassium acetate and 40 grams of water, with a mass molar concentration of 10 mol / kg (equal to a volume molar concentration of 5.61 M), the pH value is 9.53], reacted for 80 minutes, and obtained the capture agent aqueous solution (pH value is 7.45) that has captured carbon dioxide. In the aqueous capture agent solution, the carbon dioxide capture amount per mole of potassium acetate is 0.089 moles, which is equal to 0.49 moles of carbon dioxide capture amount per liter of the aqueous capture agent solution. The conversion process is as follows:

[0042] (1) 0.089mol CO 2 / 1mol potassium acetate, after converting the molar mass of potassium acetate 98.15g / mol=0.089mol CO 2 / 98.15g potassium acetate;

[0043] (2) 98.15g of potassium acetate is 2.5 times th...

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Abstract

The invention relates to a carbon dioxide collection method. The method comprises steps that trapping agent aqueous solution is made to contact with a to-be-treated object containing carbon dioxide toobtain the trapping agent aqueous solution with the captured carbon dioxide, the trapping agent aqueous solution is composed of the water and at least one trapping agent used for trapping the carbondioxide, the trapping agent is selected from tetrapotassium ethylenediamine tetraacetate, potassium salt of monoprotic carboxylic acid having a total carbon number of 12 or less, or any combination thereof, and the mass molar concentration of the trapping agent aqueous solution is in the range of 2-30 mol / kg. The carbon dioxide collection method is advantaged in that the carbon dioxide can be conveniently and effectively trapped from the to-be-treated object by utilizing the trapping agent aqueous solution.

Description

technical field [0001] The invention relates to a method for capturing acid gas, in particular to a carbon dioxide collection method for capturing carbon dioxide. Background technique [0002] Chinese patent publication CN 103301805A discloses a carbon dioxide adsorbent comprising basic cations and molecular sieves mixed with two or three basic cations. Wherein, the alkaline cation is two or three combinations of sodium ion, potassium ion and calcium ion, and the salts containing sodium ion include: sodium chloride, sodium nitrate, sodium sulfate, sodium hydroxide, sodium carbonate, bicarbonate Sodium, sodium acetate or sodium phosphate; salts containing potassium ions include: potassium chloride, potassium nitrate, potassium sulfate, potassium hydroxide, potassium carbonate, potassium bicarbonate, potassium acetate or potassium phosphate, salts containing calcium ions include Calcium chloride or calcium nitrate. The Chinese patent publication mentioned above is that molec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22
CPCG01N1/22
Inventor 陈志勇王振乾沈健生
Owner 陈志勇
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