Desulfurizing and decarbonizing absorbent

An absorbent and decarbonization technology, which is applied in the preparation/purification of reagents, sulfur, and the removal of gas pollutants. It can solve the problems of sulfur-containing gases that are difficult to meet emission standards, corrode equipment, and affect combustion performance. Effects of equipment cost, avoidance of degradation, and cost reduction

Inactive Publication Date: 2019-03-08
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, carbon dioxide in gaseous fuels can corrode equipment, affect combustion performance, and must also be treated before delivery to end users
[0003] Carbon dioxide (CO2) in prior art 2 ) purification mainly adopts alcohol amine absorption and direct discharge after analysis, H 2 S purification mainly adopts the process of alcohol amine absorption, analysis and concentration, and then enters the Claus device to catalytically convert it into sulfur. However, the sulfur-containing gas treated by the Claus method is difficult to meet the current emission standards.

Method used

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  • Desulfurizing and decarbonizing absorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The dimethyl sulfoxide absorbent of embodiment 1, Na[Fe(EDTA)]

[0032] 1. Dissolve 6230g of Na[Fe(EDTA)] in 80mL of dimethyl sulfoxide solution to make an absorbent. The iron concentration of the absorbent is 2.5607g / L and the acidity is 0.0350mmoL / mL.

[0033] 99.9% (v / v) O at 25 mL / min at room temperature 2 , 99.9% (v / v) H with a flow rate of 10mL / min 2 S, simultaneously passed into the above-mentioned 40mL absorption solution, catalyzed-oxidized for 4h, filtered to obtain sulfur solid, dried and weighed, and the sulfur yield per unit time was 13.8705 (mg / (mL·h).

[0034] The 4g absorbent absorbs 99.9% (v / v) CO with a pressure of 156.00Kpa and a flow rate of 25mL / min 2 After reaching equilibrium, blow off and regenerate with air at a flow rate of 95mL / min, and absorb CO in five cycles per gram of absorbent 2 The amount is 0.0106g, 0.010g, 0.0101g, 0.0101g, 0.0101g in turn.

Embodiment 2

[0035] The polyethylene glycol dimethyl ether absorbent of embodiment 2, Na [Fe (EDTA)]

[0036] 0.15g of Na[Fe(EDTA)] was dissolved in 100mL of polyethylene glycol dimethyl ether solution, the solid was filtered, and the supernatant was taken as an absorbent. The iron concentration of the absorbent was 0.3795g / L.

[0037] 99.9% (v / v) O at 25 mL / min at room temperature 2 , 99.9% (v / v) H with a flow rate of 10mL / min 2 S, simultaneously passed into the above-mentioned 40mL absorption solution, catalyzed-oxidized for 8h, filtered to obtain sulfur solid, dried and weighed, and the sulfur yield per unit time was 0.7058 (mg / (mL·h).

[0038] This 4g absorption liquid absorption pressure is 156.00Kpa, the flow rate is 99.9% (v / v) CO 2 After reaching equilibrium, use air with a flow rate of 95mL / min to blow off and regenerate. Absorption equilibrium is reached within 2.5 minutes, analytical equilibrium is reached within 2.5 minutes, and CO is absorbed in five cycles per gram of abso...

Embodiment 3

[0039] Example 3, [Bmim] [Fe (EDTA)] polyethylene glycol dimethyl ether absorbent

[0040] 0.32g [Bmim][Fe(EDTA)] was dissolved in 100mL polyethylene glycol dimethyl ether solution, the solid was filtered, and the supernatant was taken as an absorbent. The iron concentration of the absorbent was 1.0074g / L, and the acidity was 0.0120 mmoL / mL.

[0041] 99.9% (v / v) O at 25 mL / min at room temperature 2 , 99.9% (v / v) H with a flow rate of 10mL / min 2 S, simultaneously passed into the above-mentioned 40mL absorption solution, catalyzed-oxidized for 7h, filtered to obtain sulfur solid, dried and weighed, and the sulfur yield per unit time was 4.2980 (mg / (mL·h).

[0042] This 4g absorption liquid absorption pressure is 156.00Kpa, the flow rate is 99.9% (v / v) CO 2 After reaching equilibrium, use air with a flow rate of 95mL / min to blow off and regenerate. The absorption equilibrium is reached within 18 minutes, and the analytical equilibrium is reached within 12 minutes. Each gram of ...

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Abstract

The invention discloses a desulfurizing and decarbonizing absorbent which comprises complex iron, an organic solvent and organic alkali, wherein the mass content of the iron is 0.3-10 g/L, and the mass content of the organic alkali is 0-100 g/L; the complex ion comprises 1-butyl-3-methylimidazole EDTA-Fe, EDTA-Fe and EDTA ferric sodium salt, the organic solvent comprises dimethyl sulfoxide, polyethylene glycol dimethyl ether, or a mixture of dimethyl sulfoxide and polyethylene glycol dimethyl ether; the organic alkali can be dissolved into the organic solvent and specifically comprises 1-butyl-3-methylimidazole. According to the absorbent, the degradation of a complexing agent is avoided by adopting nonaqueous solution of the complex ion, and the cost of liquid phase catalytic oxidation islowered. Additionally, absorption liquid can be used for physically absorbing carbon dioxide while oxidation absorption of hydrogen sulfide, so that the cost of equipment for absorption is lowered.

Description

technical field [0001] The invention relates to the technical field of gas purification treatment, in particular to a desulfurization and decarbonization absorbent. Background technique [0002] Hydrogen sulfide (H 2 S) This poisonous acidic pollutant not only corrodes metal pipes during transportation but also forms acid rain to pollute the environment after burning, and its concentration in the air is (20-30)×10 -6 When there is a strong smell, increase to (100-150)×10 -6 , it paralyzes people's sense of smell, reaching 1000×10 -6 Therefore, no matter in terms of safety, environment or health, the H emitted from petroleum refining, natural gas, coal chemical industry and other industries 2 S must be purified. Additionally, CO2 in gaseous fuels can corrode equipment, affect combustion performance, and must also be treated before delivery to end users. [0003] Carbon dioxide (CO2) in prior art 2 ) purification mainly adopts alcohol amine absorption and direct discharg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/86B01D53/52B01D53/62C10G70/06C10K1/16C10K1/34C10L3/10C01B17/04
CPCB01D53/78B01D53/8612B01D2252/2026B01D2252/2053B01D2252/2056B01D2252/504B01D2257/304B01D2257/504C01B17/04C10G70/06C10K1/004C10K1/005C10K1/16C10K1/34C10L3/103C10L3/104C10L2290/541Y02P20/151
Inventor 王建宏万彦涛张宇峰
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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