Preparation method of supported catalyst for regenerating amine solution rich in carbon dioxide

A supported catalyst and carbon dioxide-enriched technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, and separation methods, can solve the problems of high energy consumption and high cost of carbon capture, and achieve easy separation, simple process, and high impact small effect

Active Publication Date: 2017-07-28
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the biggest disadvantage of this method at present is that the traditional thermal desorption method is used to regenerate the rich CO 2 When the amine solution is used, a large amount of

Method used

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  • Preparation method of supported catalyst for regenerating amine solution rich in carbon dioxide
  • Preparation method of supported catalyst for regenerating amine solution rich in carbon dioxide
  • Preparation method of supported catalyst for regenerating amine solution rich in carbon dioxide

Examples

Experimental program
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Embodiment 1

[0034] (1) Supported catalyst SO 4 2- / ZrO 2 -γ-Al 2 o 3 preparation of

[0035] In the first step, 24g zirconium oxychloride ZrOCl 2 ·8H 2O was dissolved in deionized water to obtain a 0.5mol / L aqueous solution, and then 9.2g of γ-Al was added 2 o 3 Thoroughly mix to obtain mixed solution A; vigorously stir and disperse mixed solution A, and add ammonia water to mixed solution A drop by drop to make it hydrolyze and precipitate under alkaline conditions, and leave to stand at room temperature for 12 hours to obtain mixed solution B; The mixture B was filtered, washed, and then dried at 110°C for 6 hours to obtain substance C;

[0036] In the second step, substance C is ground into powder, and in 0.5mol / L H 2 SO 4 (The volume mass ratio of the liquid in milliliters to the solid in grams is 15:1) Stir and impregnate in the solution for 1 hour, then dry at 110°C for 6 hours, and finally place the sample in a horse-boiling furnace and calcinate at 650°C for 3 hours to o...

Embodiment 2

[0049] With embodiment 1, its difference is that in catalyst preparation process, ZrO 2 and γ-Al 2 o 3 The mass ratio of is 2:1, and the obtained catalyst is marked as SZA-2. Similarly, the desorption experiment of carbon dioxide-rich amine solvent was carried out, and the results showed that compared with the blank MEA, SZA-2 can reduce the desorption energy consumption by 24.8%.

Embodiment 3

[0051] With embodiment 1, its difference is that in catalyst preparation process, ZrO 2 and γ-Al 2 o 3 The mass ratio of is 1:2, and the obtained catalyst is marked as SZA-3. Similarly, the desorption experiment of carbon dioxide-rich amine solvent was carried out, and the results showed that compared with the blank MEA, SZA-3 could reduce the desorption energy consumption by 27.8%.

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Abstract

The invention discloses a preparation method of a supported catalyst for regenerating an amine solution rich in carbon dioxide. The supported catalyst is obtained by loading a catalyst to a carrier. The carrier is gamma-Al2O3. The catalyst is a metal oxide-carrying sulfate radical-type solid superacid catalyst. The preparation method comprises (1) dissolving a metal salt in water, adding gamma-Al2O3 powder into the solution and carrying out mixing to obtain a mixed solution A, (2) increasing pH of the mixed solution A so that the metal salt is hydrolyzed to form precipitates, and aging the precipitates to obtain a mixed solution B, (3) carrying out solid-liquid separation on the mixed solution B, washing the separated solids, and then drying the solids to obtain a substance C, and (4) grinding the substance C to obtain powder, adding the powder into a solution containing sulfate radical ions, carrying out stirring and impregnating, separating the solids and washing, drying and calcining the solids to obtain the supported catalyst. The supported catalyst has excellent catalysis and desorption performances. The supported catalyst has catalytic performance superior to that of traditional catalysts such as H-ZSM-5 and gamma-Al2O3.

Description

technical field [0001] The invention relates to a preparation method of a loaded catalyst used for regeneration of an amine solution rich in carbon dioxide. Background technique [0002] Extensive use of fossil energy produces a large amount of carbon dioxide (CO 2 ) lead to global warming and exacerbated the greenhouse effect, CO 2 The capture and utilization technology has great social and environmental significance and very broad application prospects. Existing carbon dioxide capture methods include oxygen-enriched combustion, pre-combustion capture, and post-combustion capture, among which post-combustion capture can be further divided into chemical absorption, physical adsorption, and membrane separation. The chemical absorption method using organic amines as the absorption solvent has attracted widespread attention due to its advantages of fast absorption rate, large absorption capacity and recyclable solvent, and has become the most mature and widely used CO2 absorp...

Claims

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Application Information

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IPC IPC(8): B01J27/02B01D53/14
CPCB01D53/1425B01D53/1475B01D53/1493B01D2252/204B01D2252/20415B01D2252/20484B01D2252/20489B01D2257/504B01J27/02
Inventor 梁志武张晓文刘贺磊
Owner HUNAN UNIV
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