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Compound type carbon dioxide adsorbent

A carbon dioxide and adsorbent technology, which is applied in the field of composite carbon dioxide adsorbents, can solve the problems of reduced adsorption stability of organic matter and silicon dioxide, influence on adsorption effect, and decreased adsorption performance, and achieve simple preparation methods, high adsorption selectivity, The effect of easy desorption

Inactive Publication Date: 2014-12-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of surfactant will affect the adsorption effect
If the surfactant is removed by calcination, in principle, the adsorption performance can be improved; however, in actual operation, while the surfactant is removed by calcination, it will also cause a large reduction of the silanol on the surface of the silica, so that organic matter and The adsorption stability of silica is reduced, which in turn reduces the adsorption performance

Method used

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  • Compound type carbon dioxide adsorbent
  • Compound type carbon dioxide adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The composite carbon dioxide adsorbent of this embodiment includes silica mesoporous particles, water, and polyethylene polyamine adsorbed in the pores and surfaces of the mesoporous particles. The molecular structure of the polyethylene polyamine is as follows: ) Shows:

[0033] (I), where x=1 and y=9.

[0034] The preparation method is as follows:

[0035] Step 1: Hydrolyze the silica precursor (methyl orthosilicate) to form silica gel;

[0036] Step 2: Add phosphoric acid with a concentration of 60% by mass to the silica gel, quickly stir for 2 minutes and perform high-temperature gelation for 16 hours at a gel temperature of 75°C to obtain a mixture of silica mesoporous particles and phosphoric acid ; Among them, the molar ratio of phosphoric acid to methyl orthosilicate is 1;

[0037] Step 3: Wash off the phosphoric acid in the mixture of mesoporous silica particles and phosphoric acid with water, and dry the mesoporous silica particles to obtain the silica mesoporous par...

Embodiment 2

[0041] The composite carbon dioxide adsorbent of this embodiment includes silica mesoporous particles, water, and polyethylene polyamine adsorbed in the pores and surfaces of the mesoporous particles. The molecular structure of the polyethylene polyamine is as follows: ) Shows:

[0042] (I), where x=9091 and y=909.

[0043] The preparation method is as follows:

[0044] Step one: hydrolyze the silica precursor (ethyl orthosilicate) to form silica gel;

[0045] Step 2: Add phosphoric acid with a concentration of 30% by mass to the silica gel, quickly stir for 2 minutes and then perform high-temperature gelation for 24 hours at a gel temperature of 90°C to obtain a mixture of mesoporous silica particles and phosphoric acid ; Among them, the molar ratio of phosphoric acid to ethyl orthosilicate is 2;

[0046] Step three, washing off the phosphoric acid in the mixture of mesoporous silica particles and phosphoric acid with water, and drying to obtain mesoporous silica particles;

[0047] ...

Embodiment 3

[0050] The composite carbon dioxide adsorbent of this embodiment includes silica mesoporous particles, water, and polyethylene polyamine adsorbed in the pores and surfaces of the mesoporous particles. The molecular structure of the polyethylene polyamine is as follows: ) Shows:

[0051] (I), where x=500 and y=500.

[0052] The preparation method is as follows:

[0053] Step one: hydrolyze the silica precursor (methyltrimethoxysilane) to form a silica gel;

[0054] Step 2: Add phosphoric acid with a concentration of 90% by mass to the silica gel, quickly stir for 2 minutes and then perform high-temperature gelation for 8 hours at a gel temperature of 50°C to obtain a mixture of mesoporous silica particles and phosphoric acid ; Wherein, the molar ratio of phosphoric acid to methyl trimethoxysilane is 0.1;

[0055] Step three, washing off the phosphoric acid in the mixture of mesoporous silica particles and phosphoric acid with water, and drying to obtain mesoporous silica particles;

[...

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Abstract

The invention discloses a compound type carbon dioxide adsorbent. The compound type carbon dioxide adsorbent comprises carbon dioxide mesoporous particles, water and an organic matter adsorbed on pore canals and the surfaces of the mesoporous particles, wherein the organic matter is polyethylene polyamine, a molecular structural formula of the organic matter is shown in a formula (I) (described in the specification), the sum of x and y is any integral number in the range from 10 to 10000, and the ratio of x to y is 0.1-10. Compared with the prior art, the compound type carbon dioxide adsorbent is simple in preparation process, low in cost and low in volatility and has great adsorbing capacity and high adsorption selectivity on carbon dioxide; and the defects of the traditional adsorbent that the traditional adsorbent is volatile, equipment can be corroded easily and cost is high are overcome, and the compound type carbon dioxide adsorbent can be applied to industrial waste gas treatment and natural gas purification treatment.

Description

Technical field [0001] The invention belongs to the field of gas adsorption, and specifically relates to a composite carbon dioxide adsorbent. Background technique [0002] In recent years, climate change caused by the “greenhouse effect” has become a global environmental problem. The greenhouse gas CO 2 The capture and separation of serotonin has attracted more and more attention. [0003] One of the main sources of carbon dioxide is the burning of fossil fuels. Flue gas is one of the main ways to emit carbon dioxide. CO 2 The methods of capture and separation mainly include solvent absorption method, solid adsorption method, membrane separation method, and cryogenic split flow method. So far, the absorption method is still the most widely used CO 2 Separation method. Small molecule organic amine solution and inorganic salt 2 High absorption selectivity, but high energy consumption, high cost, serious corrosion to equipment; conventionally used ammonia, monoethanolamine, ethylene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01D53/02C01B31/20C01B32/50
CPCY02C10/08Y02A50/20Y02C20/40Y02P20/151
Inventor 蒋峰景章俊良于立强宋星宇刘启桐顾习之马鑫
Owner SHANGHAI JIAO TONG UNIV
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