Carbon dioxide adsorbent based on hierarchical porous silicon dioxide block body and preparation method of carbon dioxide adsorbent

Abstract

The invention discloses a preparation method of a carbon dioxide adsorbent based on a hierarchical porous silicon dioxide block body. The preparation method comprises the following steps: dissolving a triblock copolymer P123 into a hydrochloric acid solution, and then adding 1,3,5-trimethylbenzene, tetramethyl orthosilicate and epoxypropane in sequence; gelating and drying obtained sol, heating to 400 to 800 DEG C, and preserving the heat for 5 + / - 0.5 hours to obtain the hierarchical porous silicon dioxide block body; putting the hierarchical porous silicon dioxide block body into an organic amine methanol solution to enable organic amine to be uniformly loaded in the hierarchical porous block body; and placing an obtained substance into an oven for drying to obtain the carbon dioxide adsorbent based on the hierarchical porous silicon dioxide block body. The invention further discloses the carbon dioxide adsorbent, which is prepared through the method, based on the hierarchical porous silicon dioxide block body.

Description

technical field

[0001] The invention relates to the field of material technology, in particular to a carbon dioxide adsorbent based on hierarchical porous silica blocks and a preparation method. Background technique

[0002] In recent years, the increase of greenhouse gases has exacerbated global warming, and brought a series of climate problems such as drought, flood, sea level rise, etc., which has seriously affected the ecological balance of the earth and the living environment of human beings in the future. Carbon dioxide is the main gas that causes the greenhouse effect, and it is also a potential carbon resource. Therefore, reducing the emission of greenhouse gas carbon dioxide and protecting the environment have become one of the core issues to be solved in the world. In carbon dioxide capture technology, the capture material directly affects the capture cost.

[0003] At present, the commonly used carbon dioxide capture materials mainly include absorption solvents, ...

Examples

Embodiment 1

[0039] Embodiment 1, a preparation method of hierarchical porous silica block:

[0040] Weigh 7g P123 and add to 0.01mol·L -1 In 28.8ml of hydrochloric acid solution, stir magnetically for 5 hours under ice bath conditions to completely dissolve P123; then slowly add 4ml of 1,3,5-trimethylbenzene dropwise (dropping time is 30 minutes), under ice bath conditions Fully stir for 3 hours; then add 12ml of methyl orthosilicate, fully stir for 3 hours under ice bath conditions; then slowly add dropwise (dropping time is 30 minutes) 5.5ml propylene oxide, fully stir for 5min under ice bath conditions, Obtain a sol (transparent sol); place the sol in an oven at 40±5°C for 36 hours, and dry the resulting gel (translucent gel) in an oven at 60±5°C for 4 days (the purpose is to completely evaporate the water) , put the obtained block (white block) into the muffle furnace in air at 2°C·min -1 The temperature was raised to 550°C at a high speed, and kept for 5 hours, and then cooled to r...

Embodiment 2

[0041] Example 2, a preparation method of a carbon dioxide adsorbent based on hierarchical porous silica blocks:

[0042]Weigh 5.72g of PEI (polyethyleneimine) and dissolve it in 15ml of methanol to prepare a PEI solution, add 8.58g of the hierarchical porous silica block obtained in Example 1, stir for 3 hours at 40±5°C in a water bath, and then place Dry in an oven (dry in an oven at 80±10° C. for 2 days) to obtain a hierarchical porous silica block with a PEI loading of 40%, which is a carbon dioxide adsorbent based on a hierarchical porous silica block as a product. After testing, the product has good carbon dioxide adsorption and cycle performance.

Embodiment 3

[0043] Example 3, a preparation method of a carbon dioxide adsorbent based on hierarchical porous silica blocks:

[0044] Weigh 6.54g of PEI and dissolve it in 15ml of methanol to prepare a PEI solution, add 6.54g of the hierarchical porous silica block obtained in Example 1, stir for 3 hours at 40±5°C in a water bath, and then place it in an oven to dry (80 ±10°C oven for 2 days) to obtain a hierarchical porous silica block with a PEI loading of 50%, which is a carbon dioxide adsorbent based on the hierarchical porous silica block as a product. After testing, the product has good carbon dioxide adsorption and cycle performance.

technical field

[0001] The invention relates to the field of material technology, in particular to a carbon dioxide adsorbent based on hierarchical porous silica blocks and a preparation method. Background technique

[0002] In recent years, the increase of greenhouse gases has exacerbated global warming, and brought a series of climate problems such as drought, flood, sea level rise, etc., which has seriously affected the ecological balance of the earth and the living environment of human beings in the future. Carbon dioxide is the main gas that causes the greenhouse effect, and it is also a potential carbon resource. Therefore, reducing the emission of greenhouse gas carbon dioxide and protecting the environment have become one of the core issues to be solved in the world. In carbon dioxide capture technology, the capture material directly affects the capture cost.

[0003] At present, the commonly used carbon dioxide capture materials mainly include absorption solvents, ...

Examples

Embodiment 1

[0039] Embodiment 1, a preparation method of hierarchical porous silica block:

[0040] Weigh 7g P123 and add to 0.01mol·L -1 In 28.8ml of hydrochloric acid solution, stir magnetically for 5 hours under ice bath conditions to completely dissolve P123; then slowly add 4ml of 1,3,5-trimethylbenzene dropwise (dropping time is 30 minutes), under ice bath conditions Fully stir for 3 hours; then add 12ml of methyl orthosilicate, fully stir for 3 hours under ice bath conditions; then slowly add dropwise (dropping time is 30 minutes) 5.5ml propylene oxide, fully stir for 5min under ice bath conditions, Obtain a sol (transparent sol); place the sol in an oven at 40±5°C for 36 hours, and dry the resulting gel (translucent gel) in an oven at 60±5°C for 4 days (the purpose is to completely evaporate the water) , put the obtained block (white block) into the muffle furnace in air at 2°C·min -1 The temperature was raised to 550°C at a high speed, and kept for 5 hours, and then cooled to r...

Embodiment 2

[0041] Example 2, a preparation method of a carbon dioxide adsorbent based on hierarchical porous silica blocks:

[0042]Weigh 5.72g of PEI (polyethyleneimine) and dissolve it in 15ml of methanol to prepare a PEI solution, add 8.58g of the hierarchical porous silica block obtained in Example 1, stir for 3 hours at 40±5°C in a water bath, and then place Dry in an oven (dry in an oven at 80±10° C. for 2 days) to obtain a hierarchical porous silica block with a PEI loading of 40%, which is a carbon dioxide adsorbent based on a hierarchical porous silica block as a product. After testing, the product has good carbon dioxide adsorption and cycle performance.

Embodiment 3

[0043] Example 3, a preparation method of a carbon dioxide adsorbent based on hierarchical porous silica blocks:

[0044] Weigh 6.54g of PEI and dissolve it in 15ml of methanol to prepare a PEI solution, add 6.54g of the hierarchical porous silica block obtained in Example 1, stir for 3 hours at 40±5°C in a water bath, and then place it in an oven to dry (80 ±10°C oven for 2 days) to obtain a hierarchical porous silica block with a PEI loading of 50%, which is a carbon dioxide adsorbent based on the hierarchical porous silica block as a product. After testing, the product has good carbon dioxide adsorption and cycle performance.

Images