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Preparation method and application of carbon-based carbon dioxide adsorbent

A technology for carbon dioxide and carbon dioxide adsorption, applied in chemical instruments and methods, separation methods, other chemical processes, etc., to achieve excellent adsorption performance and performance improvement

Active Publication Date: 2017-03-15
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of preparation method of carbon-based carbon dioxide adsorbent, be used to solve the problem in the prior art that lacks the adsorption material that carbon dioxide has good adsorption performance under low pressure

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  • Preparation method and application of carbon-based carbon dioxide adsorbent
  • Preparation method and application of carbon-based carbon dioxide adsorbent
  • Preparation method and application of carbon-based carbon dioxide adsorbent

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Embodiment 1

[0037] like figure 1 As shown, the present embodiment provides a preparation method of a carbon-based carbon dioxide adsorbent, the preparation method comprising steps:

[0038] Step 1) S11, carrying out solvent-free grinding and polymerization of the raw material of the matrix carbon material and the inorganic salt, and obtaining the initial matrix carbon material after aging, and then performing molten salt carbonization, washing, filtering and drying on the initial matrix carbon material to obtain the matrix carbon materials;

[0039] Step 2) S12, using an oxidant to perform a surface oxidation reaction on the matrix carbon material to obtain an oxidation product;

[0040] Step 3) S13, washing, filtering and drying the oxidized product to obtain a carbon oxide material, and adding the carbon oxide material to a metal ion modifier for ion exchange;

[0041] Step 4) S14, washing, filtering and drying the ion-exchanged product or obtaining a metal ion-doped carbon material, ...

Embodiment 2

[0052] This embodiment provides a method for preparing a carbon-based carbon dioxide adsorbent, the preparation method comprising steps:

[0053] Step 1), weigh 0.88g resorcinol, 1.07g terephthalaldehyde and 9.75g zinc chloride and grind them fully in a mortar. The temperature is 5°C / min, and the holding time is 5h. The carbonized product was stirred in an excess of 1 mol / L dilute hydrochloric acid for 24 hours, then washed with deionized water to neutral filter and dried at 100° C. for 8 hours to obtain a matrix carbon material.

[0054] Step 2), add 120mL of concentrated nitric acid into a three-necked flask, then add 3g of matrix carbon material, oxidize vigorously at 90°C for 8 hours, then wash with deionized water until neutral, filter and dry at 100°C for 8 hours to obtain carbon dioxide material.

[0055] Step 3), weigh 1g of carbon oxide material and add it to 200mL NaOH aqueous solution with a concentration of 2mol / L and stir for 8 hours, then wash with deionized wa...

Embodiment 3

[0058] This embodiment provides a method for preparing a carbon-based carbon dioxide adsorbent, the preparation method comprising steps:

[0059] Step 1), take by weighing 0.48g urea, 1.07g terephthalaldehyde, 4g potassium nitrate and 6g sodium nitrate and carry out thorough grinding in mortar, the product obtained carries out molten salt carbonization, and the temperature of carbonization is 700 ℃, and heating rate is 5°C / min, holding time is 5h. The carbonized product was stirred in an excess of 1 mol / L dilute hydrochloric acid for 24 hours, then washed with deionized water to neutral filter and dried at 100° C. for 8 hours to obtain a matrix carbon material.

[0060] Step 2), add 120mL of hydrogen peroxide solution in a three-necked flask, then add 3g of matrix carbon material, oxidize at 25°C for 8 hours, then wash with deionized water until neutral, filter and dry at 100°C for 8 hours Obtain carbon dioxide material.

[0061] Step 3), weigh 1 g of carbon oxide material a...

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Abstract

The invention provides a preparation method and application of carbon-based carbon dioxide adsorption materials, and is used for solving the problems of lacking of adsorption materials with good adsorption properties for carbon dioxide under low pressure in the prior art. According to the invention, firstly, solvent-free grinding and polymerization and molten salt carbonization are comprehensively utilized to prepare a carbonaceous precursor, then surface oxidation is carried out on the carbonaceous precursor by an oxidant, finally an aqueous solution of strong metal cation salt or alkali is used to carry out ion exchange so as to obtain a carbon-based adsorbent of which the surface is uniformly introduced with strong metal ions, and a part of the strong metal ion doped carbon-based adsorbent is subjected to heat treatment so as to obtain a heat-treated metal ion doped carbon material. The adsorption capacity of the series of the carbon-based adsorbents for carbon dioxide reaches 4.58wt% maximally under the conditions that the temperature is 40 DEG C and the pressure is 0.15bar. The carbon-based carbon dioxide adsorption materials prepared by the method have originality on the preparation method, and excellent adsorption properties for carbon dioxide at low pressure (which is less than 1bar).

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a preparation method and application of a high-performance normal-temperature and low-pressure carbon-based carbon dioxide adsorbent. Background technique [0002] As the greenhouse effect becomes more and more serious and the global climate warms, the temperature of the earth's surface continues to rise, glaciers melt, sea levels rise, and extreme weather occurs from time to time. Carbon dioxide is the most important component of greenhouse gases, so the key to alleviating the pressure brought by greenhouse gases is to reduce the content of carbon dioxide in the atmosphere. [0003] Among the many carbon dioxide capture technologies that have been industrialized are organic amine leaching absorption, but this method has problems such as high desorption energy consumption and easy corrosion of equipment. The current research hotspot is to use solid adsorbent for abso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01D2257/504B01J20/223Y02C20/40
Inventor 赵红雨孙楠楠张莉娜张中正魏伟孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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