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Modified molecular sieve for CO2 adsorption separation and preparation method and device thereof

An adsorption separation and molecular sieve technology, which is applied in the field of carbon capture, can solve the problems of a large amount of waste liquid and the decrease of adsorption capacity, and achieve the effect of high efficiency load, increase adsorption capacity, and increase chemical adsorption force.

Active Publication Date: 2022-07-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This modification method can overcome the shortcomings of the traditional impregnation method, which is easy to cause pore blockage, resulting in a decrease in CO2 adsorption and a large amount of waste liquid.

Method used

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  • Modified molecular sieve for CO2 adsorption separation and preparation method and device thereof
  • Modified molecular sieve for CO2 adsorption separation and preparation method and device thereof
  • Modified molecular sieve for CO2 adsorption separation and preparation method and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] one for CO 2 The preparation method of the modified molecular sieve separated by adsorption comprises the following steps:

[0037] After weighing the MEL molecular sieve of 100kg and putting it into the double-cone vacuum heating tank 6, the feed port 7 is closed, the second valve 1 is opened, and the vacuum tightness is controlled to be-0.1MPa by the vacuum pump 4, and the product A is obtained at 200 ℃ of degassing and activation for 6 hours; The vacuum degree is controlled by the vacuum pump 4 to be -0.06MPa. After the equipment is stabilized, the first valve 1 is opened and 2kg of triethylamine is injected into the double-cone vacuum heating tank 6 through the nozzle 10. After entering the double-cone vacuum heating tank 6, the first valve 1 is closed, and the double cone vacuum heating tank 6 is closed. The cone vacuum heating tank 6 is kept at 200°C, and the rotational speed is 15RPM. After 20min, 10kg triethylamine is injected into the double cone vacuum heating...

Embodiment 2

[0039] one for CO 2 The preparation method of modified molecular sieve for adsorption separation comprises the following steps:

[0040] After weighing the MEL molecular sieve of 100kg and putting it into the double-cone vacuum heating tank 6, the feed port 7 is closed, the second valve 1 is opened, and the vacuum tightness is controlled to be-0.08MPa by the vacuum pump 4, and the product A is obtained at 200 ℃ of degassing and activation for 2 hours; The vacuum degree controlled by the vacuum pump 4 is -0.06MPa. After the equipment is stable, the first valve 1 is opened and 3kg of triisopropanolamine is injected into the double-cone vacuum heating tank 6 through the nozzle 10. After entering the double-cone vacuum heating tank 6, the first valve 1 is closed, Open the double-cone vacuum heating tank 6 to keep 150 ℃, and the rotation speed is 10RPM, after 20min, inject 9kg triisopropanolamine into the double-cone vacuum heating tank 6 again, the rotation speed is changed to 20R...

Embodiment 3

[0042] one for CO 2 The preparation method of modified molecular sieve for adsorption separation comprises the following steps:

[0043] After weighing the MEL molecular sieve of 100kg and putting it into the double-cone vacuum heating tank 6, the feed port 7 is closed, the second valve 1 is opened, and the vacuum degree is controlled to be-0.1MPa by the vacuum pump 4, and the product A is obtained at 180 ° C of degassing and activation for 4 hours; The vacuum degree is controlled to be -0.08MPa by the vacuum pump 4. After the equipment is stable, the first valve 1 is opened and 4kg of methyldiethanolamine is injected into the double-cone vacuum heating tank 6 through the nozzle 10. After entering the double-cone vacuum heating tank 6, the first valve 1 is closed, and the open The double-cone vacuum heating tank 6 is kept at 250°C, and the rotation speed is 20RPM. After 20min, 8kg methyldiethanolamine is injected into the double-cone vacuum heating tank 6 again, and the rotati...

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Abstract

The invention discloses a modified molecular sieve for CO2 adsorption separation and a preparation method and device thereof, and relates to the technical field of carbon capture. The method comprises the following steps: (1) carrying out vacuum degassing activation on a molecular sieve to obtain a product A; (2) depositing organic amine on the product A to obtain a product B; the deposition is step-by-step deposition; and (3) carrying out vacuum degassing on the product B to obtain the modified molecular sieve. According to the method, vacuum gas phase step-by-step dynamic deposition is adopted, the defects that a traditional organic amine impregnation method is uneven in loading and prone to causing pore channel blockage are overcome, waste liquid is not generated, and industrial batch production is easy to achieve. The molecular sieve provided by the invention has high CO2 adsorption capacity at low pressure, the maximum CO2 adsorption capacity is measured to be 3.35 mmol g <-1 > at 25 DEG C and 0.1 bar, the low-pressure adsorption capacity is improved by more than 50% compared with that of an original sample, and a device for preparing the modified molecular sieve provided by the invention has a very good industrial application prospect.

Description

technical field [0001] The present invention relates to the technical field of carbon capture, in particular to a carbon 2 Modified molecular sieve separated by adsorption and its preparation method and device. Background technique [0002] With the advancement of industrialization and modernization, humans use a large amount of CO generated from fossil fuels 2 The sharp increase in emissions has exacerbated the greenhouse effect, resulting in a series of environmental and climate problems, such as shrinking glaciers and permafrost, frequent occurrence of extreme weather and species extinction. Therefore, the search for efficient and feasible carbon capture technology has always been a hot research topic. [0003] Current carbon capture technologies mainly include absorption and adsorption. Among them, the adsorption method is widely used in CO due to its mature technology, high adsorption efficiency and easy industrialization. 2 Capture has been widely used in research....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01D53/02B01J20/30
CPCB01J20/186B01D53/02B01D2257/504Y02C20/40
Inventor 夏启斌黄嘉晋赵思尧汪羽苏涂是余良
Owner SOUTH CHINA UNIV OF TECH
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