Preparation method of spherical CSNS-Amine nanostructure CO2 adsorbent

A nanostructure and adsorbent technology, which is applied in the field of amine grafting modified adsorbent preparation, can solve the problems of reduced adsorption capacity and poor cycle stability, and achieves the effect of high selectivity and improved cycle stability.

Inactive Publication Date: 2018-04-13
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] For CO prepared by impregnation 2 During the adsorption-desorption cycle of the adsorbent, a large amount of amine is lost, resulting in CO 2 In order to solve problems such as reduced adsorption capacity and poor cycle stability, the present invention uses conventional oxides, nitrates and other materials to develop a low-cost, simple-to-operate spherical structure carrier material of copper silicate nano-needle arrays, and obtain organic amine-modified CO 2 Adsorbent, increased CO 2 adsorption content, and make it have good cycle stability

Method used

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  • Preparation method of spherical CSNS-Amine nanostructure CO2 adsorbent
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  • Preparation method of spherical CSNS-Amine nanostructure CO2 adsorbent

Examples

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Embodiment 1

[0025] First, dissolve 5mL tetraethyl orthosilicate in a mixture of 20mL deionized water and 260mL absolute ethanol, then add 14mL ammonia water into the above mixture and mix evenly, and mechanically stir for 3 hours at room temperature; after the reaction is completed, put the milky white liquid in Centrifuge at 7000r / min for 2min; wash the obtained white gum with water and ethanol, and dry it at 60°C. Weigh 0.52g of colloidal sphere A and ultrasonically disperse it in 160mL of deionized water, and simultaneously add 2.8mmol of Cu(NO 3 ) 2 ・3H 2 O and 24 mL NH 3 ・H 2 O was dissolved in 240mL deionized water to form a blue cuproammonia solution; the colloidal ball emulsion and the cuproammonia solution uniformly dispersed by ultrasound were quickly poured into a round bottom flask with mechanical stirring, stirred for 10-20min, and then transferred to high pressure In the hydrothermal reaction kettle, the hydrothermal reaction was carried out at 140°C for 1.5h, and the bl...

Embodiment 2

[0027] This embodiment is to change the hydrothermal reaction time on the basis of embodiment 1.

[0028]First, dissolve 5mL tetraethyl orthosilicate in a mixture of 20mL deionized water and 260mL absolute ethanol, then add 14mL ammonia water into the above mixture and mix evenly, and mechanically stir for 3 hours at room temperature; after the reaction is completed, put the milky white liquid in Centrifuge at 7000r / min for 2min; wash the obtained white gum with water and ethanol, and dry it at 60°C. Weigh 0.52g of colloidal sphere A and ultrasonically disperse it in 160mL of deionized water, and simultaneously add 2.8mmol of Cu(NO 3 ) 2 ・3H 2 O and 24 mL NH 3 ・H 2 O was dissolved in 240mL deionized water to form a blue cuproammonia solution; the colloidal ball emulsion and the cuproammonia solution uniformly dispersed by ultrasound were quickly poured into a round bottom flask with mechanical stirring, stirred for 10-20min, and then transferred to high pressure In the hy...

Embodiment 3

[0030] In this example, on the basis of Example 1, the type of organic amine to be loaded is changed.

[0031] First, dissolve 5mL tetraethyl orthosilicate in a mixture of 20mL deionized water and 260mL absolute ethanol, then add 14mL ammonia water into the above mixture and mix evenly, and mechanically stir for 3 hours at room temperature; after the reaction is completed, put the milky white liquid in Centrifuge at 7000r / min for 2min; wash the obtained white gum with water and ethanol, and dry it at 60°C. Weigh 0.52g of colloidal spheres and ultrasonically disperse them in 160mL of deionized water, while 2.8mmol of Cu(NO 3 ) 2 ・3H 2 O and 24 mL NH 3 ・H 2 O was dissolved in 240mL deionized water to form a blue cuproammonia solution; the colloidal ball emulsion and the cuproammonia solution uniformly dispersed by ultrasound were quickly poured into a round bottom flask with mechanical stirring, stirred for 10-20min, and then transferred to high pressure In the hydrothermal...

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Abstract

The invention discloses a CO2 solid amine adsorbent and a preparation method thereof. The adsorbent comprises a mesoporous copper silicate nano-microsphere carrier (core-shell microspheres and hollowspheres); 3-aminopropyltriethoxysilane (APTES), N-(beta-aminoethyl)-gama-aminopropyltrimethoxysilane (AEAPS) and diethylenetriamine trimethoxysilane (TA) are bonded to the surfaces of copper silicatenanospheres by a grafting method to obtain the solid amine adsorbent which is applied to CO2 adsorption. The preparation method comprises the following specific steps: (1), synthesizing SiO2 nanospheres (200 nanometers) by an improved Stober method; (2), with the SiO2 microspheres as moulds, synthesizing copper silicate nanospheres by a hydrothermal method, and preparing CuSiO3@SiO2 core-shell nanosphere materials and CuSiO3 hollow nanosphere materials through different hydrothermal reaction times; (3), aminating the surface of copper silicate nanosphere carrier by using the APTES, the AEAPS and the TA. The adsorbent has the significant advantages of good heat stability, relatively low adsorption and desorption temperature, good adsorption and desorption cycle stability, relatively large adsorption capacity and the like, and can capture CO2 relatively efficiently.

Description

technical field [0001] The present invention relates to CO 2 The field of preparation of adsorbents, specifically related to the preparation methods of three kinds of matrix materials and nine kinds of amine grafted modified adsorbents and their preparation methods in CO 2 applications in the field of adsorption. Background technique [0002] Global warming has aroused widespread concern, and CO 2 As the most important greenhouse gas, its main source is the combustion of fossil fuels, and the flue gas of coal-fired power plants is the main source of CO 2 source, so CO in power plant flue gas 2 Advanced capture and storage (CCS) will be the key to stabilizing atmospheric CO 2 important means of concentration. With the rapid development of social economy, my country's demand for electricity is increasing year by year, and my country's energy structure is still difficult to change, so CO 2 Emissions will continue to increase, on the other hand, CO 2 It can be widely used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01D53/02B01J20/30C01B32/50
CPCB01D53/02B01D2257/504B01J20/0237B01J20/103B01J20/22Y02C20/40Y02P20/151
Inventor 岳海荣丁明月唐思扬刘长军梁斌
Owner SICHUAN UNIV
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