Compound solvent for removing carbonyl sulfide in gas and method for removing carbonyl sulfide

A technology for removing gas and carbonyl sulfide, applied in the field of gas purification, can solve the problems of low desulfurization efficiency, production of by-products, secondary pollution, etc., and achieve the effect of reducing loss and waste of resources, mild reaction conditions and full contact.

Pending Publication Date: 2021-02-09
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is that the desulfurization efficiency of the method for removing carbonyl sulfide by inorganic alkaline solution is low, and by-products will be produced, and the high-salt organic wastewater produced will cause secondary pollution

Method used

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  • Compound solvent for removing carbonyl sulfide in gas and method for removing carbonyl sulfide
  • Compound solvent for removing carbonyl sulfide in gas and method for removing carbonyl sulfide
  • Compound solvent for removing carbonyl sulfide in gas and method for removing carbonyl sulfide

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Effect test

Embodiment 1

[0038]A compound solvent for removing carbonyl sulfide in gas, the compound solvent is mainly made of the following parts by weight of raw materials: 500-700 parts of physical absorbent, 200-350 parts of organic catalyst, 0.017- of metal complex 0.05 parts, 100-200 parts of water.

[0039]Further, the physical absorbent is polyethylene glycol dimethyl ether.

[0040]Further, the organic catalyst is N-methyldiethanolamine.

[0041]Further, the metal complex is binuclear sulfonated cobalt phthalocyanine.

[0042]Further, the saturated solubility of the binuclear sulfonated cobalt phthalocyanine in the compound solvent is 0.06 mg / mL.

[0043]Using organic catalysts and metal complexes instead of inorganic lye as carbonyl sulfide hydrolysis catalysts, using the physical absorption of organic catalysts and chemical adsorption of metal complexes, the synergistic effect of the dual catalysts has a good catalytic effect, which is beneficial to catalyze carbonyl groups. Hydrolytic conversion of sulfur.

[004...

Embodiment 2

[0059]A compound solvent for removing carbonyl sulfide from gas, mainly made of the following parts by weight of raw materials: polyethylene glycol dimethyl ether 600 parts, water 150 parts, dinuclear sulfonated cobalt phthalocyanine 0.033 parts, N-methyl 250 parts of diethanolamine;

[0060]The specific steps for removing carbonyl sulfide from the gas are as follows:

[0061](1) Preparation of compound solvent: Mix the above weight parts of polyethylene glycol dimethyl ether, dinuclear sulfonated cobalt phthalocyanine, N-methyldiethanolamine and water to obtain a compound for removing carbonyl sulfide from the gas With solvent

[0062](2) Take the above-mentioned compound solvent and place it in the absorption device. Under normal temperature and pressure conditions, the concentration of 308.28mg / Nm3The gas flow rate is 30mL / min, and the continuous reaction is 3h.

[0063]A sampler is used to take the desulfurized carbonyl sulfide gas at a sampling interval of 30 minutes. The carbonyl sulfide ...

Embodiment 3

[0066]A compound solvent for removing carbonyl sulfide in gas, mainly made of the following parts by weight of raw materials: polyethylene glycol dimethyl ether 600 parts, water 150 parts, dinuclear sulfonated cobalt phthalocyanine 0.017 parts, N-methyl 250 parts of diethanolamine;

[0067]The specific steps for removing carbonyl sulfide from the gas are as follows:

[0068](1) Preparation of compound solvent: Mix the above weight parts of polyethylene glycol dimethyl ether, dinuclear sulfonated cobalt phthalocyanine, N-methyldiethanolamine and water to obtain a compound for removing carbonyl sulfide from the gas With solvent

[0069](2) Take the above-mentioned compound solvent and place it in the absorption device. Under normal temperature and pressure conditions, the concentration of 308.28mg / Nm3The gas flow rate is 30mL / min, and the continuous reaction is 3h.

[0070]A sampler is used to take the desulfurized carbonyl sulfide gas at a sampling interval of 30 minutes. The carbonyl sulfide co...

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Abstract

The invention discloses a compound solvent for removing carbonyl sulfide in gas, relates to the technical field of gas purification, and aims to solve the problems that an inorganic alkali liquor treatment method is low in desulfurization efficiency, and secondary pollution is caused by generated byproducts and high-salinity wastewater. The compound solvent disclosed by the invention is prepared from the following chemical components: polyethylene glycol dimethyl ether, N-methyldiethanolamine, binuclear sulfonated cobalt phthalocyanine and water. The invention also discloses a method for removing carbonyl sulfide in gas, which comprises the following steps: after gaseous carbonyl sulfide is absorbed into a desulfurization solution, hydrolysis reaction on the gaseous carbonyl sulfide and water under the dual catalytic actions of N-methyldiethanolamine and binuclear sulfonated cobalt phthalocyanine is carried out to generate hydrogen sulfide and carbon dioxide which are absorbed by the desulfurization solution; and then the desulfurized solution can be desorbed in manners of heating, gas stripping and the like, so that the regeneration of the desulfurization solution is realized. Themethod has the beneficial effects that the carbonyl sulfide gas can be effectively removed, the reaction condition is mild, the desulfurization efficiency of carbonyl sulfide under the action of dualcatalysts reaches 80% or above, and no by-product is generated.

Description

Technical field[0001]The invention relates to the technical field of gas purification, in particular to a compound solvent for removing carbonyl sulfide in gas and a method for removing carbonyl sulfide.Background technique[0002]Carbonyl sulfide is a colorless, odorless, toxic gas, mainly from the atmospheric environment and industrial gases such as natural gas, blast furnace gas, coke oven gas, and refinery gas. Carbonyl sulfide has stable physical and chemical properties and is corrosive. A small amount of carbonyl sulfide will cause serious equipment corrosion and catalyst poisoning and deactivation in the industrial production process; carbonyl sulfide in the atmospheric environment is easily combined with oxygen, ozone, and HO·radicals It reacts to produce sulfur dioxide, causing acid rain, ozone depletion and other problems. At the same time, carbonyl sulfide can invade the nervous system of organisms and endanger human health. At present, many industries have increasingly str...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/78B01D53/48
CPCB01D53/78B01D53/8606B01D2257/306B01D2258/02
Inventor 余江刘雪珂杨茜张丽丁青松施王军
Owner BEIJING UNIV OF CHEM TECH
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