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Preparation method of full-process industrialization globular calcium-based CO2 adsorbent

A calcium-based adsorbent and the technology of the adsorbent are applied in the field of preparation of the full-process industrialized spherical calcium-based CO2 adsorbent, which can solve the production methods that do not pay attention to the industrial scale of adsorbent pellets, are not suitable for industrial production preparation, and are precursors It can improve the CO2 adsorption capacity, improve the cycle stability, and reduce the capture cost.

Inactive Publication Date: 2019-04-16
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the prepared powdered adsorbent is not suitable for use in the calcium circulation system. It is easily carried by the air flow and elutriated from the system, resulting in a large waste of adsorbent; on the other hand, some studies have focused on the formation of the adsorbent. However, the synthesis path of the precursor used is low in efficiency and consumes a lot of energy, which is not suitable for industrial production.
None of the above studies paid attention to the industrial scale production method of adsorbent pellets suitable for calcium circulation system

Method used

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  • Preparation method of full-process industrialization globular calcium-based CO2 adsorbent

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preparation example Construction

[0033] A full-process industrialized spherical calcium-based CO 2 The preparation method of adsorbent comprises the following steps:

[0034] (1) wet mixing the calcium-based adsorbent and the inert carrier precursor material to obtain a uniformly dispersed solution, wherein the wet mixing is used to make the two mixed more uniformly,

[0035] Taking the mass of the calcined powder as 1, the loading of the inert carrier is between 5% and 35%. During the calcination process, the calcium salt and the inert carrier precursor material will be dehydrated or other components to varying degrees, and finally become stable Oxide, so the proportion of each atom can be determined according to the proportion of the final oxide, the amount of calcium salt and inert carrier precursor added can be calculated from the mass loss in the calcination process, the amount of water added can be determined by the solubility of the precursor material, stirred and dissolved, at room temperature Or hea...

Embodiment 1

[0047] (1) Add 274.030g of calcium acetate monohydrate and 94.720g of aluminum nitrate nonahydrate into 1000mL of water, heat and stir in a 60°C water bath to form a completely clear precursor solution;

[0048] (2) Use a YC-015 spray dryer, set the air inlet temperature to 220°C, and pump the formed precursor solution into the drying chamber through a peristaltic pump at a rate of 1mL / min. After the spray drying is completed, the precursor solution is obtained in the collection tube. body powder;

[0049] (3) Calcinate the precursor powder in an air atmosphere at 900°C for 1 hour. After cooling, add 30ml of water to ensure that the calcium oxide component is completely reacted to form calcium hydroxide. After the calcium hydroxide wet material is dried, grind and sieve to below 200μm.

[0050] (4) Weigh 40 g of the calcium hydroxide powder obtained in step (3), add 10 mL of deionized water, and mix uniformly to obtain a wet material. Use the extrusion spheronizer of Shenzhe...

Embodiment 2

[0052] (1) Add 290.287g of calcium acetate monohydrate and 56.832g of aluminum nitrate nonahydrate into 1200mL of water, heat and stir in a 60°C water bath to form a completely clear precursor solution;

[0053] (2) Use a YC-015 spray dryer, set the air inlet temperature to 160°C, pump the formed precursor solution into the drying chamber through a peristaltic pump at a speed of 10mL / min, and obtain the precursor solution in the collection tube after the spray drying is completed. body powder;

[0054] (3) Calcinate the precursor powder in an air atmosphere at 950°C for 30 minutes. After it cools down, add 30ml of water to ensure that the calcium oxide component is completely reacted to form calcium hydroxide. After the calcium hydroxide wet material is dried, grind and sieve to below 200μm.

[0055] (4) Weigh 40 g of the calcium hydroxide powder obtained in step (3), add 10 mL of deionized water, and mix to obtain a wet material. Use the extrusion spheronizer of Shenzhen Xi...

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Abstract

The invention belongs to the technical field of preparation and improvement of adsorbents and discloses a preparation method of a full-process industrialization globular calcium-based CO2 adsorbent. The method comprises the following steps that (a) the calcium-based adsorbent and inert carrier powder are selected and subjected to wet-method mixing, and an evenly-mixed solution is obtained and subjected to spraying drying to obtain the calcium-based adsorbent-inert carrier powder, namely precursor powder; (b) the precursor powder is calcined to obtain calcium oxide powder, the calcium oxide powder is hydrated to obtain a calcium hydroxide wet material, and after drying, calcium hydroxide powder is obtained; (c) the calcium hydroxide powder is extruded and rounded, and the required globularcalcium-based CO2 adsorbent is obtained. According to the method, the complete preparation process of the industrialization high-performance globular calcium-based CO2 adsorbent is designed, and the demands for industrial large-scale preparation and industrial circulation fluidized bed application are met at the same time.

Description

technical field [0001] The invention belongs to the technical field of preparation and improvement of adsorbents, and more specifically relates to a full-process industrialized spherical calcium-based CO 2 Sorbent preparation method. Background technique [0002] In recent years, the extensive use of fossil fuels has caused a sharp increase in the concentration of carbon dioxide in the atmosphere. As of 2017, the global average annual carbon dioxide concentration has reached 405ppm, which has attracted widespread attention from the international community. In order to reduce global CO 2 For emissions, the Intergovernmental Panel on Climate Change (IPCC) of the United Nations has recommended carbon capture and storage technology (CCS) to the world, among which carbon capture is a key link. [0003] High-temperature capture of CO by calcium-based sorbent after combustion 2 It has the following advantages: the adsorption rate of the adsorbent is fast; the CaO adsorption capa...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30B01D53/02B01D53/62B01D53/81
CPCB01D53/02B01D53/62B01D53/81B01D2251/404B01D2251/604B01D2257/504B01J20/041B01J20/103B01J20/28019Y02C20/40
Inventor 童贤靓刘文强徐明厚杨远东李秋婉张帅
Owner HUAZHONG UNIV OF SCI & TECH
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