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An absorbent for natural gas decarbonization

An absorbent, natural gas technology, applied in gas fuels, other chemical processes, separation methods, etc., can solve problems such as large consumption

Active Publication Date: 2019-02-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Alcohol amine method is the most widely used natural gas decarbonization method at present. The conventional amine method solvent represented by MDEA has stable absorption and regeneration effect, but the energy consumed in the regeneration process accounts for more than 90% of the energy consumption, which consumes a lot of energy.

Method used

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  • An absorbent for natural gas decarbonization
  • An absorbent for natural gas decarbonization

Examples

Experimental program
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Embodiment

[0017] Such as figure 1 As shown, the prepared raw material gas (20%CO 2 、80%CH 4 ) into the bottom of the absorption tower and countercurrent contact with the absorbent entering the top of the tower, the CO in the gas 2 After being absorbed, 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.

[0018] absorbed CO 2 The rich liquid is drawn from the bottom of the absorption tower to the top of the regeneration tower, where it contacts the rising steam countercurrently for regeneration. 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.

[0019] When the gas flow rate is constant and the solution circulation volume is constant, the operability of differ...

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Abstract

The invention belongs to the technical field of gas separation, and relates to an absorbent used for natural gas decarburization. An aqueous solution composed of a main absorbent composite amine and a proper amount of an activator is adopted to remove CO2 from CO2-containing mixed gas, and the adsorbent can be regenerated and recycled. The composite amine is composed of N-methyldiethanolamine (MDEA) and diethanolamine (DEA), and the activator comprises one or more of 1,5-diazabicyclo-undecane-5-ene (DBU), hydroxyethyl piperazine (HPZ), piperazine (PZ) and 2-amino-2-methyl-1-propanol (AMP). The absorbent has the advantages of very high CO2 removal rate, good regeneration performance, realization of regeneration at a low temperature, and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of gas separation, and in particular relates to an absorbent for decarbonizing natural gas. Background technique [0002] Natural gas is a mixture of hydrocarbon gases, often containing CO 2 , and other non-hydrocarbon component gases. CO in natural gas 2 The existence of , has brought many hazards to the transportation and deep processing of natural gas. First, CO 2 Corrosion is a long-standing problem and a serious problem that cannot be ignored, especially in the presence of aqueous solutions, CO in natural gas 2 It will cause more serious corrosion to equipment and pipelines. Second, CO in natural gas 2 Excessively high content of natural gas will reduce the calorific value and pipeline transportation capacity of natural gas. "Natural Gas" GB17820-1999 2 The content of the specified, 1m 3 CO in natural gas 2 The content should not be greater than 3.0×10 -2 m 3 . In addition, when the natural ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01D53/04C10L3/10
CPCY02C20/40
Inventor 毛松柏黄海峰朱道平
Owner CHINA PETROLEUM & CHEM CORP