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Phase-change absorbent with anti-oxidative degradation and viscosity reduction for acid gas separation

A technology of acid gas and absorbent, which is applied in the field of phase change absorbent, can solve the problems of poor absorption effect of phase change absorbent, poor phase change ability, and insignificant regeneration energy consumption performance, so as to improve regeneration effect and improve Stability, the effect of maintaining absorption performance

Active Publication Date: 2020-11-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the oxidative degradation and thermal degradation of the absorbent are more significant, causing the system solution to change color shortly after acid gas removal, and the color becomes darker. At the same time, the absorption effect of the phase change absorbent becomes worse, and the solution absorbs acid The ability to undergo phase change after the gas is getting worse, resulting in insignificant performance in reducing regeneration energy consumption

Method used

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  • Phase-change absorbent with anti-oxidative degradation and viscosity reduction for acid gas separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The experiment was carried out under the same conditions as in Comparative Example 1, and the phase-change absorbent 2# formula adopted was 20 g of monoethanolamine, 70 g of polyethylene glycol dimethyl ether, and 10 g of ethanol. Record the initial degradation time and calculate the viscosity, the results are shown in Table 1.

Embodiment 2

[0025] The experiment was carried out under the same conditions as in Comparative Example 1, and the phase-change absorbent 3# formula adopted was 20 g of monoethanolamine, 70 g of polyethylene glycol dimethyl ether, and 10 g of water. Record the initial degradation time and calculate the viscosity, the results are shown in Table 1.

Embodiment 3

[0027] The experiment was carried out under the same conditions as in Comparative Example 1, and the phase-change absorbent 4# formula adopted was 20 g of monoethanolamine, 60 g of polyethylene glycol dimethyl ether, and 20 g of water. Record the initial degradation time and calculate the viscosity, the results are shown in Table 1.

[0028] Table 1 Results of enhanced oxidative degradation and viscosity experiments of phase change absorbents

[0029]

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Abstract

The invention belongs to a gas purifying technology, and relates to a new method capable of inhibiting the solution degradation and the high carrier phase viscosity of a phase change absorbent in an acid gas removing process. According to the present invention, alcohol or water is added to the main body absorbent (organic amine and polyether) according to a certain ratio to achieve effects of anti-oxidation and degradation; when the phase change absorbent is homogeneous, the additive can be well dissolved in the phase change absorbent so as to provide the protection effect; and after the phasechange absorbent removes the acid gas, the solution forms the carrier phase and the organic phase, and the additive can be respectively dissolved in the two phase solutions in a phase balance mannerso as to well protect the organic phase and the carrier.

Description

technical field [0001] The invention relates to a phase-change absorbent capable of resisting oxidation degradation and reducing viscosity for removing acid gas, and belongs to the field of gas separation or purification. The method will show good application prospects in chemical engineering, material modification, wastewater treatment, oil extraction, gas purification or separation and other chemical fields. Background technique [0002] The chemical absorption method is one of the most mature methods for acid gas removal at present, but a common problem it faces is high energy consumption. In response to this problem, work is currently being carried out from two aspects: new absorbent development and process improvement or new process research. The research idea of ​​new absorbents is mainly to develop new chemical absorbents. [0003] In recent years, some researchers have changed their way of thinking and began to study the use of polarized absorbents in the process o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/79B01D53/62B01D53/60B01D53/54B01D53/52B01D53/50B01D53/48
CPCB01D53/48B01D53/485B01D53/502B01D53/52B01D53/523B01D53/526B01D53/54B01D53/60B01D53/62B01D53/79Y02A50/20
Inventor 毛松柏陈曦汪东江洋洋黄汉根黄钟斌
Owner CHINA PETROLEUM & CHEM CORP
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