Carbon dioxide trapping agent and preparation method thereof

A carbon dioxide and capture agent technology, applied in chemical instruments and methods, separation methods, reagents, etc., can solve the problems of volatile toxic and harmful substances, poor regeneration ability of capture agents, and long capture cycle, so as to avoid the process of mining ore and transportation , lower capture cost, and shorter capture time

Inactive Publication Date: 2020-11-24
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Organic amine capture agents, although the capture temperature is low, but the capture period is long, the regeneration ability of the capture agent is poor, the capture process is easy to volatilize toxic and harmful substances, and the process is cumbersome

Method used

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  • Carbon dioxide trapping agent and preparation method thereof

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preparation example Construction

[0023] On the other hand, the embodiment of the present application provides a preparation method of the aforementioned carbon dioxide capture agent, comprising the following steps: pulverizing calcium orthosilicate to obtain calcium orthosilicate powder; pulverizing alkali metal carbonate to obtain alkali metal carbonate powder , mixing the calcium orthosilicate powder and the alkali metal carbonate powder evenly to obtain a carbon dioxide capture agent.

[0024] In some embodiments of the present invention, in the preparation method of the above-mentioned carbon dioxide capture agent, the alkali metal carbonate is melted at 600° C. for 2 hours before pulverization.

Embodiment 1

[0027] The purpose of this embodiment is to provide a carbon dioxide capture agent in which calcium orthosilicate and alkali metal carbonate cooperate to capture carbon dioxide and use the carbon dioxide capture agent to capture carbon dioxide.

[0028] (1) Ca 2 SiO 4 , Li 2 CO 3 and Na 2 CO 3 Mixed to prepare the capture agent system Ca-LiNa, where Li 2 CO 3 and Na 2 CO 3 The molar amount of Ca 2 SiO 4 , Li 2 CO 3 and Na 2 CO 3 50% of the sum of the molar quantities of Li 2 CO 3 and Na 2 CO 3 The molar ratio of Ca is 51:49, the Ca 2 SiO 4 , Li 2 CO 3 and Na 2 CO 3 Grind homogeneously in a mortar, Ca 2 SiO 4 , Li 2 CO 3 and Na 2 CO 3 The particle size is 200-300 mesh, take 20mg sample and place it in a platinum crucible with a diameter of 2mm;

[0029] (2) The heating program and the atmosphere composition of the thermogravimetric analyzer are set, the platinum crucible with 20mg sample is housed in the thermogravimetric analyzer, and the test is ...

Embodiment 2

[0036] The purpose of this embodiment is to provide a carbon dioxide capture agent in which calcium orthosilicate and alkali metal carbonate cooperate to capture carbon dioxide and use the carbon dioxide capture agent to capture carbon dioxide.

[0037] (1) Ca 2 SiO 4 , Li 2 CO 3 and Na 2 CO 3 Mixed to prepare the capture agent system Ca-LiNa, where Li 2 CO 3 and Na 2 CO 3 The molar amount of Ca 2 SiO 4 , Li 2 CO 3 and Na 2 CO 3 50% of the sum of the molar quantities of Li 2 CO 3 and Na 2 CO 3 The molar ratio of Ca is 52:48, the Ca 2SiO 4 , Li 2 CO 3 and Na 2 CO 3 Grind homogeneously in a mortar, Ca 2 SiO 4 , Li 2 CO 3 and Na 2 CO 3 The particle size is 200-300 mesh, take 20mg sample and place it in a platinum crucible with a diameter of 2mm;

[0038] (2) The heating program and the atmosphere composition of the thermogravimetric analyzer are set, the platinum crucible with 20mg sample is housed in the thermogravimetric analyzer, and the test is c...

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Abstract

The invention provides a carbon dioxide trapping agent and a preparation method thereof, and relates to the technical field of energy conservation and emission reduction. The carbon dioxide trapping agent comprises the following raw materials: calcium orthosilicate and an alkali metal carbonate, wherein the molar quantity of the alkali metal carbonate accounts for 60% or more of the total molar quantity of the calcium orthosilicate and the alkali metal carbonate. The method has the advantages that the carbon dioxide trapping agent is wide in raw material source, low in preparation cost, low intrapping temperature and capable of achieving rapid regeneration, and no pollutant is generated in the whole process.

Description

technical field [0001] The invention relates to the technical field of energy saving and emission reduction, in particular to a carbon dioxide capture agent and a preparation method thereof. Background technique [0002] Greenhouse gases have increased significantly since the industrial age, causing a serious greenhouse effect. For these excessive emissions of industrial sources of CO 2 , emission reduction has become the focus of tackling the greenhouse effect. Capture of CO from flue gases from fossil fuel combustion using capture agents 2 , and then exploiting it, is a technical choice. Common capture agents include alkali metal oxides, silicates, zirconates, and organic amines. Research on the behavior of capture agents to capture carbon dioxide is of great significance for emission reduction. [0003] Common capture agents, such as calcium oxide and lithium silicate, capture carbon dioxide at a temperature of about 600°C, and release carbon dioxide at 900°C and 720°C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30B01D53/02C01B32/55
CPCB01D53/02B01D2257/504B01J20/043B01J20/10C01B2210/0015C01B32/55Y02P20/151Y02C20/40
Inventor 宋金万王振王子睿许茜
Owner SHANGHAI UNIV
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