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Low-temperature catalytic regeneration method for carbon dioxide trapping solvent

A carbon dioxide, low-temperature catalysis technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as device or process complexity, and achieve the effects of fast regeneration rate, high leanness, and reduced regeneration energy consumption

Inactive Publication Date: 2019-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] At present, limited by the pinch point, thermal coupling has a certain limit, and new solvents based on steric hindrance effects or activation effects have been developed relatively maturely, and new solvents based on phase transition effects are still in the stage of model test research, and each This enhanced regeneration process is limited by the device or process complexity of the enhanced means used, and is still in the stage of conceptual design or laboratory research

Method used

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  • Low-temperature catalytic regeneration method for carbon dioxide trapping solvent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The method of the present embodiment has the following steps:

[0034] (1) Prepare an MEA solution with a mass fraction of 30%, and absorb and saturate it with carbon dioxide to obtain a rich solution and place it in a rich solution tank;

[0035] (2) Use the rich liquid pump to heat the rich liquid to 60°C and then send it to the regeneration tower. Fill the regeneration tower with stainless steel θ ring packing in random piles, and use electric heating to control the temperature of the reboiler of the regeneration tower to 90°C;

[0036] (3) After the regenerated lean liquid is cooled, the lean liquid pump is used to send it to the lean liquid tank to keep the liquid level in the reboiler stable;

[0037] (4) The acid gas obtained from regeneration is condensed and separated from the moisture in the top condenser of the regeneration tower, and then discharged after being measured by a flow meter.

[0038] (5) The device was continuously and stably operated for 1 hour...

Embodiment 2

[0040] The method of the present embodiment has the following steps:

[0041] (1) Prepare an MEA solution with a mass fraction of 30%, and absorb and saturate it with carbon dioxide to obtain a rich solution and place it in a rich solution tank;

[0042] (2) Use the rich liquid pump to heat the rich liquid to 60°C and then send it to the regeneration tower. The stainless steel θ ring packing and solid acid catalyst γ-Al are randomly packed in the regeneration tower 2 o 3 , the reboiler of the regenerative column uses electric heating to control the temperature at 90°C, and the reboiler is filled with solid acid catalyst γ-Al 2 o 3 ;

[0043] (3) After the regenerated lean liquid is cooled, the lean liquid pump is used to send it to the lean liquid tank to keep the liquid level in the reboiler stable;

[0044] (4) The acid gas obtained from regeneration is condensed and separated from the moisture in the top condenser of the regeneration tower, and then discharged after bei...

Embodiment 3

[0047] The method of the present embodiment has the following steps:

[0048] (1) Prepare compound amine solution (mass fraction: MEA30%, MDEA10%), and use carbon dioxide to absorb and saturate to obtain a rich solution and place it in a rich solution tank;

[0049] (2) Use the rich liquid pump to heat the rich liquid to 60°C and send it to the regeneration tower. The stainless steel θ ring packing and solid acid catalyst HZSM-5 molecular sieve are packed in the regeneration tower in a bundled package, and the regeneration tower kettle reboiler Use electric heating to control the temperature at 90°C, and the reboiler is filled with solid acid catalyst HZSM-5 molecular sieve;

[0050] (3) After the regenerated lean liquid is cooled, the lean liquid pump is used to send it to the lean liquid tank to keep the liquid level in the reboiler stable;

[0051] (4) The acid gas obtained from regeneration is condensed and separated from the moisture in the top condenser of the regenerat...

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Abstract

The invention discloses a low-temperature catalytic regeneration method for a carbon dioxide trapping solvent. According to the method, a solid acid catalyst is added into a regeneration tower and / ora reboiler, the activation energy of regeneration reaction of carbon dioxide is reduced by virtue of a catalytic action of the catalyst, and the regeneration reaction rate of a carbon dioxide solventis increased. By utilizing the method disclosed by the invention, the regeneration energy consumption of carbon dioxide can be increased by over 30% than the regeneration energy consumption of a traditional MEA solvent, the regeneration temperature is 60-95 DEG C, and waste heat wastewater can be taken as a heat source, so that the use of steam is avoided, the deficiency degree of a deficiency absorbent is high, and the regeneration efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide capture, and specifically relates to a method for regenerating a carbon dioxide capture solvent. The method reduces the activation energy of the carbon dioxide regeneration reaction by adding a solid catalyst to the regeneration tower, improves the regeneration reaction rate, and reduces Regeneration reaction temperature, thereby reducing the energy required for regeneration. Background technique [0002] Carbon dioxide is one of the most important greenhouse gases. With the continuous increase of human demand for energy, a large amount of carbon dioxide is emitted into the atmosphere, causing serious damage to the balance of the earth's climate and ecosystem. Therefore, carbon dioxide emission reduction has attracted widespread attention. Carbon dioxide capture is an important way to reduce carbon dioxide emissions, and it is also the first step in resource utilization of carbon dioxide. ...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/1425B01D53/1475B01D2252/20478Y02A50/20Y02C20/40
Inventor 毛松柏郭本帅叶宁赵运生陈小花
Owner CHINA PETROLEUM & CHEM CORP