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Carbon dioxide adsorbent and preparation method thereof

A carbon dioxide and adsorbent technology, applied in the field of carbon dioxide adsorbent and its preparation, can solve the problems of easy blockage of mesopores and decreased adsorption capacity, and achieve the effects of large absorption capacity, improved adsorption capacity and high stability

Inactive Publication Date: 2015-01-07
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The third way is to carry out in-situ polymerization of high molecular weight amine on porous silicon carrier. The disadvantage of this kind of adsorbent is that because the pores of silicon carrier are small, the branched chain type high molecular weight organic amine formed by polymerization is very easy to block the medium. Pores, resulting in a serious drop in adsorption capacity (Chem.Mater.2008,20,1126-1133)
[0004] Based on the above reasons, it is necessary to search for a new type of CO with large absorption capacity, fast absorption and desorption speed, and high stability. 2 Adsorbents have become an urgent problem in this field

Method used

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  • Carbon dioxide adsorbent and preparation method thereof
  • Carbon dioxide adsorbent and preparation method thereof
  • Carbon dioxide adsorbent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of silica hollow sphere carrier: Add 550 mg of tetraethyl orthosilicate and 6.96 ml of polystyrene emulsion suspension (diameter 526 nm, 2.62 wt %) into a 10 ml glass bottle, and the resulting mixture is continuously ultrasonicated for 2 hours , centrifuged at 7000rmp for 40min, dried at room temperature for 12h, and then the polystyrene emulsion template was calcined at 600°C for 8 hours to remove it. The as-prepared silica hollow spheres are denoted as SH.

[0041](2) Take 0.5g of silica hollow sphere carrier, heat and dry under vacuum at 100°C for 12h, then add 30ml of anhydrous toluene and 3-aminopropyltrimethoxysilane (0.398mmol), and stir the mixture at room temperature for 24h Hour. The resulting solid product was washed successively with toluene, methanol, methanol / water (1:1) and methanol, and dried under vacuum.

[0042] (3) Under the protection of nitrogen, add 13.2 g of benzyloxycarbonyl arginine and 50 ml of tetrahydrofuran (THF) to the th...

Embodiment 2

[0044] A carbon dioxide adsorbent, the inner and outer surfaces of which are aminated silicon dioxide hollow spheres as a carrier, linear poly-L-arginine (PLA) is fixed on the inner and outer surfaces of the carrier through chemical bonds in the form of in-situ polymerization.

[0045] A method for preparing a carbon dioxide adsorbent, using an amination agent to aminate the inner and outer surfaces of silica hollow spheres, and then polymerizing PLA on the inner and outer surfaces of the hollow spheres by in-situ polymerization to obtain the carbon dioxide adsorbent;

[0046] The amination reagent is selected from the group consisting of 3-aminopropyltrimethoxysilane;

[0047] The pore diameter of the silica hollow spheres is 50nm;

[0048] The PLA is a linear polymer;

[0049] Specific steps are as follows:

[0050] 1) Preparation of silica hollow sphere carrier: Add tetraethyl orthosilicate and polystyrene emulsion suspension into a glass bottle, and the resulting mixture...

Embodiment 3

[0061] (1) Preparation of silica hollow sphere carrier: Add 660 mg of tetraethyl orthosilicate and 8.35 ml of polystyrene emulsion suspension (diameter 526 nm, 2.62 wt %) into a 10 ml glass bottle, and the resulting mixture is continuously ultrasonicated for 2 hours , centrifuged at 7000rmp for 40min, dried overnight at room temperature, and then calcined the polystyrene emulsion template at 600°C for 6 hours to remove it.

[0062] (2) Take 0.6g of silica hollow sphere carrier, heat and dry under vacuum overnight at 100°C, then add 36ml of anhydrous toluene and 3-aminopropyltrimethoxysilane (0.478mmol), and place the mixture at room temperature Stir for 24 hours. The resulting solid product was washed successively with toluene, methanol, methanol / water (1:1) and methanol, and dried under vacuum.

[0063] (3) Under the protection of nitrogen, add 13.2 g of benzyloxycarbonyl arginine and 50 ml of tetrahydrofuran (THF) to the three-necked flask, keep stirring, and ice bath; add ...

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Abstract

The invention discloses a carbon dioxide solid amine adsorbent and a preparation method thereof. The adsorbent comprises a silicon dioxide hollow ball carrier with a large hole size (50nm-550nm) and linear poly-L-arginine (PLA) which is chemically bonded on the inner and outer surfaces of a hollow ball by an in situ polymerization manner. The specific preparation method comprises the following steps: (1) synthesizing the silicon dioxide hollow ball carrier by using tetraethoxysilane and polystyrene emulsion (PS); (2) carrying out amination on the surface of the hollow ball carrier with 3-aminopropyltrimethoxysilane; and (3) polymerizing PLA on the inner and outer surfaces of the hollow ball in situ by adopting the in situ polymerization manner. The adsorbent has the remarkable advantages of high adsorption-desorption speed, large adsorption capacity, good long-period stability and the like; the problems of corrosion and high energy consumption of a liquid ammonia adsorbent in current industry are solved; and the problems of the solid amine adsorbent that the long-period adsorptivity is poor and the adsorption capacity is low are also solved.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a carbon dioxide adsorbent and a preparation method thereof. Background technique [0002] In recent decades, due to the CO in the atmosphere 2 The concentration of greenhouse gases represented by the continuous increase, CO 2 Capture and storage technology has developed rapidly. The ammonia water absorption method is currently the most commonly used method for large-scale industrial gas absorption, but this method has many shortcomings, such as: high energy consumption, strong corrosion to equipment, and low absorption capacity. In order to better improve these problems, scientists began to turn to the research of solid adsorbents, embedding small molecular ammonia or high molecular ammonia directly into solid supports (such as mesoporous silicon, carbon, organic resins and other polymer materials). Compared with the traditional liquid ammonia adsorption, the rege...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/02C08G69/10
CPCB01D53/02C08G69/10B01J20/262Y02C20/40Y02P20/151
Inventor 刘法谦李荣勋丁乃秀苏娟刘莉李超芹李伟刘光烨
Owner QINGDAO UNIV OF SCI & TECH
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