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Method for preparing solid amine CO2 adsorption material based on nano-silica dipping

A nano-silica, adsorption material technology, applied in chemical instruments and methods, through adsorption, separation methods and other directions, can solve problems such as the inability to use carbon dioxide capture, and achieve strong competitiveness, easy desorption, and low energy consumption for desorption. Effect

Inactive Publication Date: 2014-08-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, for low-temperature separation and membrane separation to capture carbon dioxide, it can only be applied to certain specific technical requirements, and it cannot be applied to large-scale capture of carbon dioxide in flue gas

Method used

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  • Method for preparing solid amine CO2 adsorption material based on nano-silica dipping
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  • Method for preparing solid amine CO2 adsorption material based on nano-silica dipping

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Experimental program
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Effect test

Embodiment 1

[0022] A preparation of solid-state amine CO based on nano-silica impregnation 2 The method of adsorption material, first weigh 0.86g branched PEI with a molecular weight of 600Da with a 150ml beaker, then add 25ml of methanol to the beaker, stir at room temperature for 30 minutes, and completely dissolve the PEI in methanol. Then weigh 2g of nano-silica (the nano-silica used has been vacuum-dried (≤1mmHg) at 105°C for 3 hours), add it into a beaker, and then add 5ml of methanol. Afterwards, stir at room temperature for 5 hours. After the liquid in the beaker becomes very viscous, dry it in an oven at 50°C for 2 hours, and then place it in a vacuum (≤1mmHg) drying oven. Dry at 50°C for 2 hours. Through elemental analysis, it can be determined that the PEI loading of the prepared material is 30%. Name the sample: 30% BPEI / 600-silica.

Embodiment 2

[0024] A preparation of solid-state amine CO based on nano-silica impregnation 2 The method of adsorption material, at first weighs the branched PEI that the molecular weight of 2.26g is 600Da with the beaker of 150ml, then adds the methanol of 25ml in the beaker, stirs 30 minutes at room temperature, PEI is dissolved in the methanol completely. Then weigh 2g of nano-silica (the nano-silica used has been vacuum-dried (≤1mmHg) at 105°C for 3 hours), add it into a beaker, and then add 5ml of methanol. Afterwards, stir at room temperature for 5 hours. After the liquid in the beaker becomes very viscous, dry it in an oven at 50°C for 2 hours, and then place it in a vacuum (≤1mmHg) drying oven. Dry at 50°C for 2 hours. Through elemental analysis, it can be determined that the PEI loading of the prepared material is 50%. Name the sample: 50% BPEI / 600-silica.

Embodiment 3

[0026] A preparation of solid-state amine CO based on nano-silica impregnation 2 The method of adsorption material, first weigh 3.88g branched PEI with a molecular weight of 600Da with a 150ml beaker, then add 25ml of methanol to the beaker, stir at room temperature for 30 minutes, and completely dissolve the PEI in methanol. Then weigh 2g of nano-silica (the nano-silica used has been vacuum-dried (≤1mmHg) at 105°C for 3 hours), add it into a beaker, and then add 5ml of methanol. Afterwards, stir at room temperature for 5 hours. After the liquid in the beaker becomes very viscous, dry it in an oven at 50°C for 2 hours, and then place it in a vacuum (≤1mmHg) drying oven. Dry at 50°C for 2 hours. Through elemental analysis, it can be determined that the PEI loading of the prepared material is 60%. Name the sample: 60% BPEI / 600-silica.

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Abstract

The invention provides a method for preparing a solid amine CO2 adsorption material based on nano-silica dipping. According to the method, precipitation-process nano-silica which is cheap and has a large-scale industrial supply source is used as a substrate, polyethyleneimine with high thermal stability and high content of amido groups is loaded on the substrate through wet dipping, so the solid amine CO2 adsorption material with high thermal stability and cyclic adsorption stability is prepared. The material is applicable in a temperature range of 25 to 150 DEG C which well covers the temperature range of typical flue gas, so the material can be stably applied to capture of CO2 in flue gas; the material also has the characteristic of low energy consumption in desorption and can realize desorption of CO2 under the condition of 1.8 * 10<6> kJ (wherein delta T is equal to 15 DEG C), and energy consumption of the material is 40% of the energy consumption of a 30% MEA aqueous solution CO2 absorption system (wherein delta T is equal to 40.56 DEG C).

Description

technical field [0001] The invention relates to the wet impregnation loading of organic amines and the preparation of carbon dioxide adsorption materials, in particular to a preparation of solid amine CO2 based on impregnation of nanometer silica 2 methods of adsorbing materials. Background technique [0002] The capture, utilization and storage (CCUS) of carbon dioxide directly from the source of carbon dioxide emissions is considered to be the most effective way to reduce greenhouse gas emissions and curb global warming. Faced with the need to reduce carbon dioxide emissions, countries around the world, including China, are actively developing research on carbon dioxide capture technologies and materials. At present, a variety of technologies have been used for carbon dioxide capture, including alkanolamine aqueous solution to absorb carbon dioxide, activated carbon, zeolite, MOFs, solid amine materials, alkaline earth metal oxides to absorb carbon dioxide, and low-temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/32B01D53/02
CPCY02C10/08Y02C20/40
Inventor 蒋建国李凯敏颜枫陈雪景田思聪
Owner TSINGHUA UNIV
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