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Absorption liquid for trapping hydrogen sulfide through phase change

A liquid absorption and phase change technology, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problems of difficulty in regeneration and recycling, high energy consumption for desorption of desulfurizers, and achieve low energy consumption for regeneration and stable use. Oxidation, the effect of increasing added value

Inactive Publication Date: 2018-06-12
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wet desulfurization is widely used because the desulfurization rate is much higher than that of dry desulfurization, it can be used for crude desulfurization of high hydrogen sulfide gas, and it can be recycled. It is difficult to solve the problem of wet desulfurization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Under normal temperature and pressure, mix a certain amount of organic amine and a certain amount of organic solvent in a 50mL beaker and transfer them to a 50mL absorber. The organic amine is 1,3,5-trimethylpyrazole , and its mass fraction is 20%; the organic solvent is sulfolane, and its mass fraction is 80%. h 2 S is controlled by a gas mass flow controller to pass into the absorber, and reacts for 15 minutes. In the formed liquid-liquid two-phase, H in the rich phase 2 The distribution ratio of S is 95.4%.

Embodiment 2

[0023] Under normal temperature and pressure, a certain amount of organic amine and a certain amount of organic solvent are thoroughly mixed in a 50mL beaker, and then transferred to a 50mL absorber, wherein the organic amine is 1,4-dimethylpiperazine, and its The mass fraction is 20%; the organic solvent is polyethylene glycol dimethyl ether, and its mass fraction is 80%. h 2 S is controlled by a gas mass flow controller to pass into the absorber, and reacts for 15 minutes. In the formed liquid-liquid two-phase, H in the rich phase 2 The distribution ratio of S is 95.7%.

Embodiment 3

[0025] Under normal temperature and pressure, a certain amount of organic amine and a certain amount of organic solvent are thoroughly mixed in a 50mL beaker, and then transferred to a 50mL absorber, wherein the organic amine is 1-methylimidazole, and its mass fraction is 25 %; Organic solvent is isoheptane, and its mass fraction is 75%. h 2 S is passed into the absorber controlled by a gas mass flow controller, reacted for 15 minutes, and centrifuged to form a liquid-solid two-phase, and H in the solid-phase product 2 The distribution ratio of S is 94.8%.

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Abstract

The invention discloses absorption liquid for trapping H2S through phase change for the problem that the existing H2S absorption liquid is high in energy consumption in desorption and low in sulfur resource utilization rate and the like. The absorption liquid is prepared from organic amine and organic solvent, and is used for absorbing H2S gas to achieve the liquid-liquid or liquid-solid split-phase effect. The H2S rich phase is sent into a regeneration tower to heat and desorb, the H2S lean phase can cyclically absorb H2S after being recycled without any processing treatment, the treatment quantity of the solution in the desorption is reduced, and the desorption energy consumption is lowered, wherein the distribution ratio of the H2S in the rich phase can achieve 93% or more, and the absorption liquid is appropriate to be used as a chemical absorbent for trapping H2S in the natural gas, the coal gas and refinery gas and the like, and belongs to the technical fields of the energy conservation and emission reduction and gas purification.

Description

technical field [0001] The invention relates to H in natural gas, coalification gas and refinery gas 2 The S trapping technology specifically relates to a new type of organic amine phase change absorption liquid, and belongs to the field of energy saving, emission reduction and gas purification. Background technique [0002] Atmospheric environmental pollution is one of the main environmental problems faced by human beings, among which CO 2 , SO 2 、H 2 S and other acid gas pollution is more prominent. With the continuous acceleration of our country's industrialization process, the environmental quality is also deteriorating, and environmental problems have gradually become the focus of people's attention. In recent years, regional air pollution problems such as acid rain, haze and photochemical smog have become increasingly prominent in some areas of my country, seriously threatening public health and affecting environmental safety. Therefore, in order to actively take ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/52B01D53/78B01D53/96
CPCB01D53/1425B01D53/1468B01D53/1493B01D53/52B01D53/78B01D53/96B01D2251/206B01D2252/20
Inventor 赵文波徐志勇汪洋赵倩柴牧原陈玲
Owner KUNMING UNIV OF SCI & TECH
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