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Method for capturing and enriching carbon dioxide by using active material or modified active material and application thereof

A carbon dioxide and active material technology, applied in chemical instruments and methods, applications, separation methods, etc., can solve the problems of high cost, high cost of carbon dioxide, and inability to apply large-scale applications, and achieve stable adsorption and desorption capabilities, high industrialization potential, The effect of good application prospects

Pending Publication Date: 2018-12-11
四川芯意成科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rapid increase in carbon dioxide concentration leads to severe greenhouse effect
At present, there are not many feasible methods and technologies, mainly including: 1. Alkaline solution, although the process cost of absorbing carbon dioxide is low, but the cost of regeneration is high to desorb carbon dioxide; 2. Amine-modified oxide, although its adsorption capacity and stability 3. Amine-modified metal-organic framework materials. There are many reports on such materials, but they are expensive and have not been used for large-scale applications. 4. Low-temperature separation, using two-stage compression and condensation to liquefy or solidify carbon dioxide into dry ice, and then use distillation to separate carbon dioxide from liquefied or solidified impurities. This technology consumes a lot of energy and Need special equipment, not suitable for home application; 5. Membrane separation technology, this technology is still in the research stage, the cost is high, and it cannot be applied on a large scale for the time being
[0004] Generally speaking, the traditional method of capturing and enriching carbon dioxide in the air under normal temperature and pressure has obvious shortcomings, while the research and development of new materials and new methods are still in the development stage, and large-scale applications cannot be achieved in the short term.

Method used

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  • Method for capturing and enriching carbon dioxide by using active material or modified active material and application thereof
  • Method for capturing and enriching carbon dioxide by using active material or modified active material and application thereof
  • Method for capturing and enriching carbon dioxide by using active material or modified active material and application thereof

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Experimental program
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preparation example Construction

[0066] In the present invention, the modified zeolite molecular sieve is to use metal salt (such as calcium chloride, lithium chloride, potassium chloride, calcium nitrate, potassium nitrate, potassium sulfate or potassium carbonate) to react with zeolite molecular sieve, and the cation in the metal salt Replace the cations in the zeolite molecular sieve to form a zeolite molecular sieve modified by metal ions, which changes the adsorption performance of the zeolite molecular sieve; it can be prepared by the following method: put the zeolite molecular sieve into the reaction vessel, and under the protection of an inert gas, the concentration of Add 0.1-2.0M metal salt solution into the reaction vessel, adjust the outflow rate of the metal salt solution to 0.5-15mL / s, stop adding the metal salt solution after 30-300min, wash and dry to obtain the modified zeolite molecular sieve.

[0067] In the present invention, modified activated alumina can be obtained by modifying activated...

Embodiment 15

[0088] Example 15 Figure 1-16 Among them, "*" means that the active material or modified active material is compared with air, p<0.05, and the difference is significant; "**" means that the active material or modified active material is compared with air, p<0.01, and the difference is extremely significant; "#" indicates that the modified active material is compared with the unmodified active material, p<0.05, the difference is significant; "##" indicates that the modified active material is compared with the unmodified active material, p<0.01, the difference is extremely significant.

Embodiment 1

[0089] Example 1: Ion exchange resin adsorption and desorption of carbon dioxide in the air under normal temperature and pressure

[0090] (1), 150g strong base type anion exchange resin (oxygen hydroxide type) and weak base type anion exchange resin (oxygen hydroxide type) are loaded in two desorption boxes A respectively;

[0091] (2) Under room temperature conditions with a relative humidity of 50%, feed air into the desorption box A for 10 minutes;

[0092] (3) Put the desorption box A into an airtight container with a volume of 1.5 L, pass water vapor into the container, raise the relative humidity in the desorption box A to 70%, maintain it for 50 minutes, and use a portable carbon dioxide detector to record the humidity in the airtight container. carbon dioxide concentration;

[0093] (4), repeat the above-mentioned adsorption-desorption operation, record the carbon dioxide concentration at the 100th and 500th time, the results are shown in Table 1.

[0094] Table 1 I...

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Abstract

The invention discloses a method for capturing and enriching carbon dioxide by using an active material or a modified active material and an application thereof and belongs to the technical field of environmental protection. In order to absorb carbon dioxide in air efficiently for a long time, the invention provides the method for capturing and enriching carbon dioxide by using the active materialor the modified active material. The active material is ion exchange resin, a zeolite molecular sieve, activated aluminium oxide or activated carbon, and the modified active material is a modified zeolite molecular sieve, modified activated aluminium oxide or modified activated carbon. The method can be used for adsorbing carbon dioxide in air efficiently at a constant temperature and a constantpressure and desorbs the adsorbed carbon dioxide. The carbon dioxide can be also taken as a carbon dioxide gas fertilizer for promoting growth of organisms, including growth of microalgae. Carbon dioxide is fully utilized, and the carbon dioxide content in air is reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for capturing and enriching carbon dioxide in the air and its application. Background technique [0002] With the development of human society, the concentration of carbon dioxide in the air gradually rose from 280ppm in 1750 before the industrial revolution to 367ppm in 1999, and then rose rapidly to 379ppm in 2005. The rapid increase in carbon dioxide concentration has led to a severe greenhouse effect. How to reduce the concentration of carbon dioxide in the air and make full use of carbon dioxide is a hot spot in academia and industry. [0003] Since the concentration of carbon dioxide in the air is very low compared to the carbon dioxide in industrial waste gas and natural gas, industrial waste gas and natural gas pretreatment methods are not suitable for capturing and enriching it at normal temperature and pressure. Capturing and enri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/02A01G33/00
CPCA01G33/00B01D53/02B01D2257/504B01J20/08B01J20/18B01J20/20B01J20/26Y02P60/20Y02C20/40
Inventor 唐成康
Owner 四川芯意成科技有限公司
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