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A composite decarbonization absorbent

An absorbent and decarbonization technology, which is applied in the direction of absorption, separation of dispersed particles, air quality improvement, etc., can solve the problems of high regeneration energy consumption, small capacity, and low absorption rate of absorbents, and achieve large absorption capacity and inhibit degradation , The effect of solving the loss problem

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the above-mentioned mixed absorbent has partially improved the absorption performance, there are still problems of low absorption rate, small capacity and high regeneration energy consumption of the absorbent.

Method used

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  • A composite decarbonization absorbent
  • A composite decarbonization absorbent
  • A composite decarbonization absorbent

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0015] The composite decarbonization absorber provided by the present invention comprises monoethanolamine and activator, and described activator is the compound of formula 1, wherein, R 1 , R 2 , R 3 All are straight-chain or cyclic alkyl groups with H or C atoms of 1-5.

[0016]

[0017] In the absorbent provided by the present invention, the monoethanolamine and the activator can be completely miscible. The preferred solution is: based on the total weight of the absorbent, in terms of weight percentage, the composite decarburization absorbent contains 12-40wt% monoethanolamine, 0.1-30wt% compound of formula 1 and the balance of water. More preferably, it contains 12-35 wt% of monoethanolamine, 2-15 wt% of the compound of formula 1 and the balance of water.

[0018] In the absorbent provided by the present invention, the activator is a compound shown in formula 1, wherein R 1 , R 2 , R 3 All are straight-chain or cyclic alkyl groups with H or C atoms of 1-5. R 1 ,...

Embodiment 1

[0040] Example 1 illustrates that the composite decarburization absorbent provided by the present invention absorbs CO in gas 2 Effect.

[0041] The composite decarburization absorbent contains 12wt% MEA, 2wt% bicyclic amidine and 86wt% water. Put 100mL of composite decarburization absorbent into the absorption bottle and react at a temperature of 30°C. Determine the carbon dioxide saturated absorption capacity of the absorbent and the time required to reach the saturated absorption capacity. Put 100mL of composite decarburization absorbent saturated with carbon dioxide into the desorption bottle, control the temperature at 60°C, and measure the regeneration rate. The operating conditions and results are shown in Table 1.

Embodiment 2

[0046] Example 2 illustrates that the composite decarburization absorbent provided by the present invention absorbs CO in gas 2 Effect.

[0047] The composite decarburization absorbent contains 20wt% MEA, 6wt% bicyclic amidine and 74wt% water. Put 100mL of composite decarburization absorbent into an absorption bottle and react at a temperature of 35°C. Determine the carbon dioxide saturated absorption capacity of the absorbent and the time required to reach the saturated absorption capacity. Put 100mL of composite decarburization absorbent saturated with carbon dioxide into the desorption bottle, control the temperature at 70°C, and measure the regeneration rate. The operating conditions and results are shown in Table 2.

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Abstract

The invention relates to a composite decarburization absorbent, which comprises monoethanolamine and an activator, wherein the activator is a compound represented by a formula 1, and R1, R2 and R3 are H or C1-C5 C1-5 linear alkyl or cyclic alkyl. According to the composite decarburization absorbent, carbon dioxide with a partial pressure of 0.01-0.025 MPa in mixing gas can be removed, and characteristics of rapid absorption, large capacity and low regeneration energy consumption are provided.

Description

technical field [0001] The present invention relates to an adsorbent for gas separation, more specifically, to an absorbent for absorbing and removing carbon dioxide from mixed gas. technical background [0002] In recent years, as the global average temperature continues to rise, greenhouse gases, especially CO 2 The recycling problem has aroused great attention from the scientific community and the governments of various countries. According to the United Nations Intergovernmental Panel on Climate Change, the amount of CO in the atmosphere 2 The main greenhouse gas concentration has changed from 2.8×10 in the early stage of industrialization -4 (volume fraction) increased to the current 3.56×10 -4 , and continued the upward trend. The greenhouse effect will cause many hazards, one of which is the rise of sea level. It is conservatively estimated that the sea level will rise by 40-50cm in the next 100 years, and the safety of many coastal cities is threatened. At the C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
CPCY02C10/06Y02A50/20Y02C20/40
Inventor 刘建强罗一斌李明罡舒兴田
Owner CHINA PETROLEUM & CHEM CORP