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Preparation method for grafted and modified silicon-based solid-state-amine carbon dioxide adsorption material

An amine carbon dioxide and adsorption material technology is applied in the field of preparation of silicon-based solid amine carbon dioxide adsorption materials, which can solve the problems of high energy consumption and affecting use.

Inactive Publication Date: 2014-07-16
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The aqueous solution of organic amines has the problems of oxidative decomposition of organic amines and corrosion of adsorption equipment during use. Especially in the process of desorption of carbon dioxide, a large amount of water needs to be heated, which makes the use of aqueous solutions of organic amines to absorb carbon dioxide. The energy consumption is very high, which affects the use of this technology to a certain extent

Method used

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  • Preparation method for grafted and modified silicon-based solid-state-amine carbon dioxide adsorption material
  • Preparation method for grafted and modified silicon-based solid-state-amine carbon dioxide adsorption material
  • Preparation method for grafted and modified silicon-based solid-state-amine carbon dioxide adsorption material

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Embodiment 1

[0022] A method for preparing a grafted modified silicon-based solid amine carbon dioxide adsorption material, comprising drying the precipitated silica at 110°C for 2-3 hours, weighing 10g of the dried precipitated silica and adding it to 250ml three-neck flask, then add 200ml of dry toluene to the flask, put the flask into an oil bath and fix it, connect the reflux condenser to the flask, and put the magnetic stirrer rotor into the flask at the same time, and then pour the Nitrogen was introduced into the flask to discharge the air in the flask, and then the flask was sealed, stirred at a constant speed and heated to 90°C. After the temperature was stabilized at 90°C, 4ml of divinyltriaminopropyltrimethoxysilane was added to the Keep stirring at a constant speed in the flask, and let the above reaction proceed at 90°C for 6 hours. After the reaction is complete, filter the synthesized material and rinse it twice with 100ml of absolute ethanol, and then dry it in a vacuum oven...

Embodiment 2

[0024] A preparation method of a grafted modified silicon-based solid amine carbon dioxide adsorption material, drying fumed silicon dioxide at 110°C for 2-3 hours, weighing 5g of the dried fumed silicon dioxide and adding it to 250ml three-neck flask, then add 100ml dry toluene to the flask, put the flask into an oil bath and fix it, connect the reflux condenser to the flask, and put the magnetic stirrer rotor into the flask at the same time, and then put it into the flask Nitrogen was introduced into the flask to discharge the air in the flask, and then the flask was sealed, stirred at a constant speed and heated to 90°C. After the temperature was stabilized at 90°C, 2ml of divinyltriaminopropyltrimethoxysilane was added to the Keep stirring at a constant speed in the flask, and let the above reaction proceed at 90°C for 6 hours. After the reaction is complete, filter the synthesized material and rinse it twice with 100ml of absolute ethanol, and then dry it in a vacuum oven ...

Embodiment 3

[0026] A preparation method of a grafted modified silicon-based solid amine carbon dioxide adsorption material, drying MCM-41 at 110°C for 2-3 hours, weighing 10g of dried MCM-41 and adding it to a 250ml three-neck flask Then add 200ml of dry toluene to the flask, put the flask into an oil bath and fix it, connect the reflux condenser to the flask, put the magnetic stirrer rotor into the flask, and then feed nitrogen into the flask To discharge the air in the flask, then seal the flask, stir it at a constant speed and heat it to 90°C, after the temperature is stabilized at 90°C, add 4ml of divinyltriaminopropyltrimethoxysilane into the flask, and Keep stirring at a constant speed, and let the above reaction proceed at 90°C for 6 hours. After the reaction is completed, filter the synthesized material and wash it twice with 100ml of absolute ethanol, and then dry it in a vacuum oven at 80°C for 12 hours. Yes, the air pressure in the oven is <1mm Hg. The sample was named as DETA...

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Abstract

The invention provides a preparation method for a grafted and modified silicon-based solid-state-amine carbon dioxide adsorption material. The preparation method comprises the following steps: respectively grafting a silane coupling agent-diethylenetriamino propyl trimethoxy silane with a high content of amine to four types of silicon dioxide base bodies in a post-period grafting and modifying manner to synthesize a solid adsorption material; adsorbing carbon dioxide by utilizing the solid adsorption material; and forming a stable silica silicon bond between the silane coupling agent and each silicon dioxide base body by chemical reaction between methoxy in the silane coupling agent and hydroxyl on each silicon dioxide base body, so as to firmly graft the silane coupling agent to the surface of silicon dioxide and synthesize the stable carbon dioxide adsorption material; the adsorption material prepared in the manner has the good heat stability and the high mass transfer efficiency; the carbon dioxide can be efficiently captured.

Description

technical field [0001] The invention relates to the technical field of surface chemical modification of silicon dioxide, in particular to a method for preparing a graft-modified silicon-based solid-state amine carbon dioxide adsorption material. Background technique [0002] A large number of scientific studies have shown that the increase in the concentration of carbon dioxide in the atmosphere is the main cause of global warming. By 2012, the concentration of carbon dioxide in the atmosphere had reached 393ppm, an increase of 41% compared to the level before industrialization (before 1750). In order to ensure that the global equilibrium temperature rise is controlled within 2-2.4°C, human beings must accelerate the pace of carbon dioxide emission reduction. However, with the development of economy, human's demand for energy will further increase, and fossil energy will still be the most important energy source for human beings in the next few decades, which means that the ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J2/30B01D53/81B01D53/62
CPCY02A50/20Y02C20/40
Inventor 蒋建国李凯敏田思聪
Owner TSINGHUA UNIV
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