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Desulfurizing agent for purifying natural gas and petrochemical gas

A petrochemical and gas purification technology, which is applied in the field of desulfurization agent and polymer amine to remove H2S solvent, to achieve the effect of convenient solvent regeneration, good economy, and not easy to chemical degradation

Inactive Publication Date: 2012-07-18
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the specific reaction mechanism is not yet clear, but it is certain that oxidation does play a part

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0011] Prepare a polymeric amine-ethylene glycol solution with a mass percent of polymeric amine of 5%. Add 95 grams of ethylene glycol and 5 grams of polymeric amine into an open container, stir with a stirrer to make a uniform solution, and serve as a desulfurizer. A natural gas feedstock, H 2 S content is 324.5mg / m 3 , at an airspeed of 160h -1 , Under the conditions of absorption pressure 0.1MPa and temperature 25°C, desulfurization is carried out with a prepared desulfurizer, and the sulfur content of the purified gas is 0.2mg / m 3 , Desulfurization rate>99.9%.

example 2

[0013] Prepare a polymeric amine-water solution with a mass percentage of polymeric amine of 95%. Add 95 grams of water and 5 grams of polyamine respectively into an open container, stir with a stirrer to make a uniform solution, and serve as a desulfurizer. A natural gas feedstock, H 2 S content is 324.5mg / m 3 . at airspeed 160h -1 , Under the conditions of absorption pressure 0.1MPa and temperature 25°C, desulfurization is carried out with the prepared desulfurizer, and the sulfur content of the purified gas is 0 mg / m 3 , the desulfurization rate is 100%.

example 3

[0015] Prepare a polymeric amine-ethylene glycol solution with a polymeric amine percentage of 18%. Add 82 grams of water and 18 grams of polyamine into an open container, and stir with a stirrer to make a uniform solution, which is a desulfurizer. use N 2 Simulated sulfur-containing feed gas, H 2 S content is 11065.4mg / m 3 , desulfurize with a prepared desulfurizer at a space velocity of 160h -1 , absorption pressure 0.1MPa and temperature 35°C, the sulfur content of the purified gas is 4.2mg / m 3 , Desulfurization rate>99.9%.

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PUM

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Abstract

The invention provides a desulfurizing agent for purifying the natural gas and the petrochemical gas, which is used for purifying the natural gas, the refinery gas, the synthesis gas and the other sulfur-containing waste gas in a desulfurizing way. The invention provides the desulfurizing agent which is economical, environment-friendly and reusable. The desulfurizing agent has the technical scheme that the desulfurizing agent consists of 'polymeric amine and water or glycol' or 'polymeric amine, sulfolane and water', according to the condition whether feed gas contains organic sulfur or not, a prescription is divided into two kinds, aiming at the feed gas which does not contain the organic sulfur or contains less organic sulfur, one kind of the prescription comprises 5-25% of polymeric amine and 75-95% of water or glycol; and aiming at the feed gas which has higher sulfur content, another kind of the prescription comprises 0-15% of polymeric amine, 30-40% of sulfolane and 50-65% of water. The preparation method of the desulfurizing agent comprises the following steps of: firstly adding water or glycol into a container with an opened mouth, and adding the polymeric amine, or firstly adding water and sulfolane, and then adding polymeric amine, and evenly stirring, so that the desulfurizing agent is formed. The desulfurizing agent can be operated under normal pressure or low pressure, and the desulfurizing agent is convenient in solvent regeneration, simple and convenient in device, simple in technological process, and better in economical efficiency.

Description

technical field [0001] The invention relates to a desulfurizer used for desulfurization and purification of natural gas, liquefied petroleum gas, refinery gas, coal bed methane, synthesis gas and other sulfur-containing waste gases, which is a kind of polymer amine desulfurization agent 2 The S solvent belongs to the field of natural gas and petrochemical gas purification. Background technique [0002] Generally, industrial gases such as natural gas, liquefied petroleum gas and refinery gas contain a certain amount of H 2 S component, in order to ensure clean and safe production and meet subsequent product processing requirements, H must be added 2 S removed. Current gas deH 2 S is mainly a solvent absorption method, among which N-methyldiethanolamine (MDEA) compound solvent is the most widely used and the technology is the most mature. MDEA passed with H 2 S forms a stable acid-base complex to desulfurize feed gas, while pure MDEA solution absorbs H 2 The S rate is lo...

Claims

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Application Information

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IPC IPC(8): B01D53/14
Inventor 唐晓东李晶晶许玮玮卿大咏李小红谯勤
Owner SOUTHWEST PETROLEUM UNIV
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