Application of tri-(2-aminoethyl) amine as carbon dioxide absorbent

A carbon dioxide, aminoethyl technology, applied in the direction of absorption, chemical instruments and methods, separation methods, etc., can solve the problem of not being able to meet the requirements of high-speed, high-capacity, low-cost absorption solvent, slow reaction rate, and relatively expensive price, etc. problems, to achieve the effects of low desorption energy consumption, large absorption capacity, and high recycling rate

Active Publication Date: 2012-11-28
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]The chemical formula of tris(2-aminoethyl)amine is: , the molecular formula is C6H18N4, currently mainly used in pharmaceutical intermediates, other uses are unknown

Method used

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  • Application of tri-(2-aminoethyl) amine as carbon dioxide absorbent
  • Application of tri-(2-aminoethyl) amine as carbon dioxide absorbent
  • Application of tri-(2-aminoethyl) amine as carbon dioxide absorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 :experiment procedure

[0023] Devices used such as figure 1 shown. The saturation device and the reaction device are both placed in a constant temperature water tank. Tris(2-aminoethyl)amine is prepared into an aqueous solution of a certain concentration (0.5mol / L-4mol / L) as a carbon dioxide absorbing liquid.

[0024] Specific experimental process: N 2 , CO 2 The gas is mixed by the cylinder through the pressure reducing valve and the mass flow meter in turn, and then enters the saturation device for saturation (the gas is moistened to a certain extent to achieve a certain saturated vapor pressure). The saturated gas enters the reaction device filled with absorption liquid, and then condenses through the condenser and then vents. The temperature of the absorption process is controlled by a temperature controller (20°C-90°C), while the mass flow meter is used to control CO 2 with N 2 The proportion of (that is, to simulate the CO in the absorbed gas ...

Embodiment 2

[0025] Example 2: Absorbent Temperature Investigation

[0026] Using the method described in Example 1, tris(2-aminoethyl)amine is formulated into an aqueous solution with a concentration of 2mol / L as a carbon dioxide absorbing liquid, and under the condition of normal pressure 0.1MPa, the control of CO 2 The volume fraction is 15% (i.e. CO 2 The partial pressure is 15kPa), measure the relationship between the absorption capacity of TAEA and temperature, 8-10 hours to reach absorption equilibrium, and the comparison with the absorption capacity of MEA under the same conditions, such as image 3 shown.

[0027] image 3 is the CO of the aqueous solution of TAEA at different temperatures 2 Absorption capacity and CO of MEA aqueous solution 2 Absorption capacity comparison, ● is MEA, ◆ is TAEA. Depend on image 3 Visible, TAEA as CO 2 As an absorbent, it is feasible at 20°C-90°C, and at different temperatures, it has a larger absorption capacity than MEA. And under...

Embodiment 3

[0028] Example 3: Absorbent Concentration Investigation

[0029] With the method described in Example 1, under the condition of normal pressure 0.1MPa, control CO 2 The volume fraction is 15% (i.e. CO 2 The partial pressure is 15kPa), the temperature of the absorbent is 40°C, and tris(2-aminoethyl)amine aqueous solutions with different molar concentrations are prepared as the carbon dioxide absorption liquid: 0.5 mol / L, 1 mol / L, 2 mol / L, 3 mol / L , 4mol / L to measure the absorption capacity of TAEA. The final results show that the greater the concentration of TAEA in the carbon dioxide absorbing liquid, the CO per unit volume of the absorbing liquid 2 The absorption capacity is increased. Considering economic factors, 1mol / L-3mol / L is more suitable, and 2mol / L is more suitable under the other conditions mentioned above.

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Abstract

The invention belongs to the field of carbon dioxide capture and separation, and in particular provides application of tri-(2-aminoethyl) amine as a carbon dioxide absorbent. Compared with the traditional absorption solvent, the performance of absorbing CO2 of the tri-(2-aminoethyl) amine provided by the invention is superior to that of the traditional absorption solvent (such as mono ethanol amine), and the tri-(2-aminoethyl) amine has the advantages of larger absorption capacity and quicker absorption speed.

Description

technical field [0001] The invention belongs to the field of carbon dioxide capture and separation, and specifically provides the application of tris(2-aminoethyl)amine as a carbon dioxide absorbent. Background technique [0002] In recent years, global environmental problems such as the depletion of the ozone layer, the intensification of the greenhouse effect, and acid rain have become increasingly serious, posing severe challenges to the sustainable development of the human environment and economy. In particular, CO emissions resulting from the combustion of large amounts of fossil fuels 2 The intensification of the greenhouse effect caused by the increase is a hot topic of global environmental pollution that has caused international controversy, so the issue of emission reduction has attracted widespread attention worldwide; at the same time, CO 2 It is also a potential chemical resource and has very important applications in industrial production. How to recover CO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/62
CPCB01D53/1493B01D53/14C10L1/2222Y02C10/06B01D2252/20415C10L3/103C10L2290/541B01D53/1475B01D53/62Y02C10/04Y02C20/40
Inventor 梁志武刘贺磊那艳清童柏栋
Owner HUNAN UNIV
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