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a carbon dioxide absorber

A carbon dioxide and absorbent technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of low absorption efficiency, serious energy consumption, low success rate of physical absorption methods, etc., to achieve strong absorption capacity, recycling The effect of low energy consumption and simple preparation method

Active Publication Date: 2021-12-31
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three absorption methods have their own advantages and disadvantages. For example, the physical-chemical method consumes more energy, while the chemical absorption method will generate toxic substances and cause environmental pollution, and the physical absorption method has a lower efficiency.
However, due to the existence of mass transfer resistance, it is difficult for carbon dioxide to enter the interior of the solid, so the absorption efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: 5%wt polyethyleneimine (Mw=600)-ethylene glycol deep eutectic solvent absorbs CO at 303.15K, 313.15K, 323.15K, 333.15K and 343.15K 2

[0023] Weigh a certain amount of medicine according to the mass ratio of polyethyleneimine-ethylene glycol as 1:19 and add them into 100mL screw-top bottles respectively, and place the screw-top bottles in an oven at 373.15K until a uniform, clear and transparent The liquid is the deep eutectic solvent; after cooling, use the device to measure the effect of the deep eutectic solvent on CO at different temperatures. 2 Solubility, test steps ① Turn on the weighing device, weigh the empty beaker, pour the liquid to be tested into the empty beaker, and pour about four-fifths of it. ②Stir bar, thermocouple, CO 2 The ventilation tube is fixed, and the original weight is recorded. ③ Turn on the stirrer and the temperature control system, keep the stirrer speed constant, and set the temperature to be measured. ④ Turn off the stirri...

Embodiment 2

[0024] Example 2: 5%wt polyethyleneimine (Mw=1800)-ethylene glycol deep eutectic solvent absorbs CO at 303.15K, 313.15K, 323.15K, 333.15K and 343.15K 2

[0025] Weigh a certain amount of medicine according to the mass ratio of polyethyleneimine-ethylene glycol as 1:19 and add them into 100mL screw-top bottles respectively, and place the screw-top bottles in an oven at 373.15K until a uniform, clear and transparent The liquid is the deep eutectic solvent; after cooling, use the device to measure the effect of the deep eutectic solvent on CO at different temperatures. 2 The solubility of polyethyleneimine-ethylene glycol (1:19) at 303.15K CO 2 Solubility is 3.6887g / 100g, CO at 313.15K 2 Solubility is 2.9062g / 100g, CO at 323.15K 2 Solubility is 2.4162g / 100g, CO at 333.15K 2 The solubility is 0.5999g / 100g, CO at 343.15K 2 The solubility is 0.5135g / 100g.

Embodiment 3

[0026] Example 3: 5%wt polyethyleneimine (Mw=10000)-ethylene glycol deep eutectic solvent absorbs CO at 303.15K, 313.15K, 323.15K, 333.15K and 343.15K 2

[0027] Weigh a certain amount of medicine according to the mass ratio of polyethyleneimine-ethylene glycol as 1:19 and add them into 100mL screw-top bottles respectively, and place the screw-top bottles in an oven at 373.15K until a uniform, clear and transparent The liquid is the deep eutectic solvent; after cooling, use the device to measure the effect of the deep eutectic solvent on CO at different temperatures. 2 The solubility of polyethyleneimine-ethylene glycol (1:19) at 303.15K CO 2 Solubility is 5.7649g / 100g, CO at 313.15K 2 The solubility is 3.5401g / 100g, CO at 323.15K 2 Solubility is 2.2492g / 100g, CO at 333.15K 2 Solubility is 2.0746g / 100g, CO at 343.15K 2 The solubility is 1.7354g / 100g.

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Abstract

The invention discloses a carbon dioxide absorbent, which is a deep eutectic solvent using polyethyleneimine (PEI) as a hydrogen bond acceptor and ethylene glycol (EG) as a hydrogen bond donor. The deep eutectic solvent of the present invention can absorb carbon dioxide with relatively high solubility under air conditions. The low eutectic solvent raw material of the present invention is non-toxic, harmless, cheap and easy to obtain, and the carbon dioxide absorption method is simple, efficient, and environmentally friendly.

Description

technical field [0001] The invention relates to a safe and environment-friendly green absorbent, in particular to a carbon dioxide absorbent. Background technique [0002] Coal, oil, and natural gas are the three pillars of human energy, and the use of these energy sources will produce a large amount of carbon dioxide (CO 2 ) emissions, up to 30 billion tons / year. As we all know, carbon dioxide is a "greenhouse" gas, and the annual increase of carbon dioxide content in the atmosphere will cause the greenhouse effect and lead to global warming. This is a serious environmental problem facing the whole world. Therefore, it is of great significance to reduce the emission of carbon dioxide in the atmosphere. Moreover, carbon dioxide is a resource with abundant reserves. If it can be turned into a resource scientifically and rationally, it will turn waste into treasure. Therefore, the capture of carbon dioxide is particularly important. [0003] At present, carbon dioxide cap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
CPCB01D53/1475B01D53/1493B01D2252/504Y02A50/20Y02C20/40
Inventor 刘昆孙浩波刘训伟姚苌
Owner HEFEI UNIV OF TECH