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Purificant used for absorbing hydrogen sulfide and carbonyl sulfide in tail gas of natural gas and preparation method thereof

A technology for adsorbing natural gas and cleaning agents, applied in chemical instruments and methods, gas fuels, other chemical processes, etc., can solve the problems of low desulfurization accuracy and high desulfurization accuracy, and achieve the effect of simple composition, low use cost and good desulfurization effect.

Active Publication Date: 2014-01-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet method and the dry method have their own advantages and disadvantages: the wet method has a high sulfur capacity, but the desulfurization accuracy is low; while the dry method has a lower sulfur capacity than the wet method, but the desulfurization accuracy is higher
[0006] Domestic natural gas desulfurization patents, whether wet or dry, are mainly used in natural gas exploration and production processes, such as Chinese patents CN101082007A, CN1653164A, CN1431281A, etc., which have not been reported in the field of environmental purification

Method used

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  • Purificant used for absorbing hydrogen sulfide and carbonyl sulfide in tail gas of natural gas and preparation method thereof
  • Purificant used for absorbing hydrogen sulfide and carbonyl sulfide in tail gas of natural gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 2.1g of zinc acetate containing two crystal waters, 2.4g of copper sulfate containing five crystal waters, and prepare a mixed solution with 100mL of water, then immerse 40g of activated carbon particles in the prepared mixed solution, and stir at room temperature for 4 hours. Dry at 80° C. for 6 hours to obtain particles loaded with active metal carriers. Immerse the particles loaded with active metal carriers in a mixed solution of 68%-70% nitric acid and 50% hydrogen peroxide until no more gas is generated. After the particles were filtered out, they were washed with distilled water to detect that the pH value was 5. Under the condition of drying temperature of 115° C., dry for 10 hours to obtain the finished cleaning agent. The active components of the cleaning agent: the mass percentage of zinc acetate is 1.5%, the mass percentage of copper sulfate is 1.5%; the mass percentage of the carrier is 97%.

[0025] as attached figure 1 , put the cleaning agent 2 ...

Embodiment 2

[0027] Weigh 3.0g Zinc acetate Contains two crystal water, 4.6g copper nitrate It contains six crystal waters, and is mixed with 100mL water to make a mixed solution, then immerse 40g of activated carbon particles in the prepared mixed solution, and stir at room temperature for 6 hours. Dry at 70° C. for 8 hours to obtain particles loaded with active metal carriers. Immerse the particles loaded with active metal carriers in a mixed solution of 68%-70% nitric acid and 50% hydrogen peroxide until no more gas is generated. After the particles were filtered out, they were washed with distilled water to detect that the pH value was 5. Under the condition of drying temperature of 115° C., dry for 10 hours to obtain the finished cleaning agent. The active components of the cleaning agent: the mass percentage of zinc acetate is 2.2%, the mass percentage of copper nitrate is 2.5%; the mass percentage of the carrier is 95.3%.

[0028] as attached figure 1 , put the cleaning agent...

Embodiment 3

[0030] Weigh 3.7g of zinc nitrate containing six crystal waters, 3.8g of copper sulfate containing five crystal waters, and prepare a mixed solution with 100mL of water, then immerse 40g of activated carbon particles in the prepared mixed solution, and stir at room temperature for 4 hours. Dry at 80° C. for 6 hours to obtain particles loaded with active metal carriers. Immerse the particles loaded with active metal carriers in a mixed solution of 68%-70% nitric acid and 50% hydrogen peroxide until no more gas is generated. After the particles were filtered out, they were washed with distilled water to detect that the pH value was 5. Under the condition of drying temperature of 120° C., dry for 8 hours to obtain the finished cleaning agent. The active components of the cleaning agent: the mass percentage of zinc nitrate is 2.0%, the mass percentage of copper sulfate is 2.0%; the mass percentage of the carrier is 96.0%.

[0031] as attached figure 1 , put the cleaning agent 2...

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Abstract

The invention discloses a purificant for tail gas of natural gas and a preparation method thereof, especially to a purificant which removes hydrogen sulfide and carbonyl sulfide gas harmful to human beings in tail gas of natural gas produced in the process of industrial production or experiments through chemisorptions, belonging to the field of purification of atmospheric pollution. The purificant uses active carbon as a carrier and a soluble zinc salt and a soluble copper salt as active components. The preparation method for the purificant comprises the following steps: preparing an aqueous solution from the soluble zinc salt and the soluble copper salt; loading the aqueous solution on the active carbon carrier; and carrying out drying, oxidation treatment, washing with distilled water and drying. The normal temperature purificant provided by the invention is widely applicable to purification of ppm-grade hydrogen sulfide and carbonyl sulfide gas tail gas of natural gas used a factory or laboratory, and the content of hydrogen sulfide and carbonyl sulfide gas is less than 30 ppb after purification; and the purificant has the advantages of simple components, easy preparation, a low price, low usage cost and a good desulphurization effect and has a great popularization value.

Description

technical field [0001] The invention relates to a cleaning agent for natural gas tail gas and a preparation method thereof, in particular to a cleaning agent for removing harmful hydrogen sulfide and carbonyl sulfide gases in natural gas tail gas in industrial production or experimental processes through chemical adsorption. The invention belongs to the atmosphere The field of pollution purification. Background technique [0002] Natural gas is a clean, environmentally friendly and safe energy source, but natural gas contains sulfur compounds such as hydrogen sulfide and carbonyl sulfide that are harmful to human body. Sulfur purification is of more concern. [0003] Natural gas in my country generally contains hydrogen sulfide and carbonyl sulfide, and there are two forms of hydrogen sulfide and carbonyl sulfide: one is that organic matter is pyrolyzed underground into hydrocarbon gas, accompanied by hydrogen sulfide and carbonyl sulfide; the other is hydrocarbon gas Hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/32C10L3/10
Inventor 陈松张颖
Owner CHINA PETROLEUM & CHEM CORP
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