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Absorber for selectively removing H2S from CO2-containing mixing gas

An absorbent and selective technology, applied to the separation of dispersed particles, chemical instruments and methods, separation methods, etc., to achieve high removal selectivity

Inactive Publication Date: 2016-02-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to further improve the solvent to H 2 S selectivity, developed complex amine solvents formed by adding various organic alcohol amines to MDEA, and MDEA complex solvents added with various activators (such as piperazine, morpholine, sulfolane, etc.), and in MDEA complex solvents Adding an acid component to increase its response to H 2 S Selective not yet reported

Method used

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  • Absorber for selectively removing H2S from CO2-containing mixing gas
  • Absorber for selectively removing H2S from CO2-containing mixing gas
  • Absorber for selectively removing H2S from CO2-containing mixing gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the prepared raw material gas (containing 1%H 2 S, 15% CO 2 , 84%N 2 ) into the bottom of the absorption tower and countercurrent contact with the absorbent entering the top of the tower, the H in the gas 2 S is absorbed, and the purified gas comes out from the top of the tower and enters the gas-liquid separator to recover the entrained liquid droplets and then vents.

[0025] The rich liquid that has absorbed the acid gas is drawn from the bottom of the absorption tower to the top of the regeneration tower, where it is regenerated by countercurrent contact with rising steam. The regenerated lean liquid is sent to the top of the absorption tower for absorption after being cooled. The gas from the top of the regeneration tower enters the regeneration gas cooler to recover the water vapor in the gas, and the regeneration gas is separated and then emptied.

[0026] When the gas flow rate is constant and the solution circulation volume is co...

Embodiment 2

[0030] Implementation example 2: Contains 1%H 2 S, 35% CO 2 , 64%N 2 The feed gas passes through such as figure 1 The absorption device, adopts the absorbent of the present invention to selectively remove H 2 S.

[0031] When the gas flow rate is constant and the solution circulation volume is constant, the operability of different absorbents is shown in Table 2.

[0032] Table 2: Operating performance of different absorbents

[0033]

[0034] The results show that the absorbent with added acid component has higher H 2 S selective.

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PUM

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Abstract

The present invention belongs to the technical field of gas separation, and relates to an absorber for selectively removing H2S from CO2-containing mixing gas. According to the present invention, an aqueous solution adopting composite amine as a main absorber and further comprising a proper amount of an activator and a proper amount of an acid component is used to selectively remove H2S from CO2-containing mixing gas, the absorber can be regenerated and recycled, the composite amine comprises N-methyldiethanolamine (MDEA) and diisopropanolamine (DIPA), the activator comprises one or a plurality of materials selected from 1,5-diazabicyclo-undecane-5-ene (DBU), 1,4-diazabicyclo[4,3,0]-5-nonene (DBN), hydroxyethyl piperazine (HPZ), and 2-amino-2-methyl1-propanol (AMP), and the acid component comprises one or a plurality of materials selected from phosphoric acid, boric acid, formic acid and citric acid; and the absorber of the present invention has the high H2S removal selectivity.

Description

Technical field [0001] The present invention belongs to the field of gas separation technology, which involves a specific way to contain CO 2 Selective removal in the mixed gas 2 S's absorbent. Background technique [0002] Natural gas, refinery gas, synthetic gas and other industrial airflows often contain H 2 S and Co 2 Essence [0003] H 2 S and Co 2 Existing will cause equipment corrosion, environmental pollution, catalyst poisoning, and reducing the quality of the product, so strict control is needed.In industry, sometimes it needs to be removed by selective removal H 2 S to achieve the optimization of products and craftsmanship.like: [0004] 1 Selective removal H 2 S, you can enrich the poverty in H. 2 S to meet the requirements of Claus sulfur recovery device to improve the quality of the product. [0005] 2 Selective removal H 2 S, which can effectively purify the exhaust gas generated by certain processes and enable it to meet the standards.Such as Claus sulfur recovery...

Claims

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Application Information

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IPC IPC(8): B01D53/14
Inventor 毛松柏朱道平黄海峰
Owner CHINA PETROLEUM & CHEM CORP