Preparation method of spherical calcium-based CO2 adsorbent

A technology of CO2 and adsorbent, which is applied in the field of preparation of spherical calcium-based CO2 adsorbent, can solve the problems of increased cost and unfavorable industrial application, and achieve the effect of complete shape, simple method and stable performance

Active Publication Date: 2016-10-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

At the same time, the above-mentioned methods all require specific machinery and equipment, and the complicated preparation process will increase the cost, which does not make use of industrial applications.

Method used

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  • Preparation method of spherical calcium-based CO2 adsorbent
  • Preparation method of spherical calcium-based CO2 adsorbent
  • Preparation method of spherical calcium-based CO2 adsorbent

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preparation example Construction

[0037] The invention provides a spherical calcium-based CO 2 The preparation method of adsorbent comprises the following steps:

[0038] (1) Based on 1 part by weight of sodium alginate, add 1 part of sodium alginate, 0.05 to 0.2 parts of inert load, and 0.5 to 5 parts of pore-forming agent in 1 part to 1000 parts of water , heated at room temperature or 30°C to 100°C with water to make it evenly mixed to obtain a colloidal solution;

[0039] (2) Through a peristaltic pump or a syringe, drop the colloidal solution into a calcium salt solution with a mass fraction greater than or equal to 1% at a speed of 1ml / min to 15ml / min to obtain spherical calcium alginate; the particle size of the spherical calcium alginate It is mainly related to the concentration of the colloidal solution. The higher the concentration of the colloidal solution, the larger the droplet of the colloidal solution is due to the intermolecular force of the sodium alginate molecules, so the particle size of t...

Embodiment 1

[0044] (1) Add 2 g of sodium alginate to 100 g of deionized water, heat at 80° C. and stir to form a sodium alginate colloid;

[0045] (2) Drop the formed sodium alginate colloid into a calcium nitrate solution with a mass concentration of 20% at a rate of 8 ml / min through a peristaltic pump to form a spherical calcium alginate precipitate with a diameter of about 3 mm;

[0046] (3) Spherical calcium alginate was calcined at 850°C for 30 minutes in an air atmosphere to obtain the desired spherical calcium-based CO 2 Adsorbent.

Embodiment 2

[0048] (1) Mix 2 g of sodium alginate powder and 2 g of cellulose powder with a particle size of less than 300 μm, then add 100 g of deionized water, heat at 80° C. and stir to form a sodium alginate colloid containing cellulose;

[0049] (2) drop the formed sodium alginate colloid into a calcium nitrate solution with a mass concentration of 20% at a rate of 8ml / min through a peristaltic pump to form a spherical calcium alginate precipitate with a diameter of about 3mm;

[0050] (3) Spherical calcium alginate was calcined at 850°C for 30 minutes in an air atmosphere to obtain the required spherical calcium-based CO 2 Adsorbent.

[0051] In addition, the parameters of Example 3-Example 10 are specifically shown in Table 1, and the parameters not listed in the table are the same as those of Example 1.

[0052]

[0053]

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Abstract

The invention discloses a preparation method of a spherical calcium-based CO2 adsorbent. The preparation method comprises the following steps: adding 1 part by weight of sodium alginate to 1-1000 parts by weight of water, and uniformly mixing calcium alginate and water to obtain a colloidal solution; dripping the colloidal solution into a calcium salt solution to obtain spherical calcium alginate with the particle size of 1.5-4mm; and calcining the spherical calcium alginate at 600-1200DEG C in oxygen-containing atmosphere to realize complete thermal decomposition of the spherical calcium alginate in order to obtain the spherical calcium-based CO2 adsorbent. The preparation method is simple and is easy to operate, and the preparaed spherical calcium-based CO2 adsorbent has the advantages of good sphericity degree, smooth surface and outstanding CO2 cycle adsorption ability, so good prospect is provided for industrial application of calcium-based adsorbents.

Description

technical field [0001] The invention belongs to the technical field of preparation and improvement of adsorbent, more specifically, relates to a spherical calcium-based CO 2 Sorbent preparation method. Background technique [0002] As a global environmental problem, the greenhouse effect and global warming have attracted more and more attention from the international community. To reduce global CO 2 Carbon capture, utilization, storage (CCUS) technology has been proposed. [0003] In numerous CO 2 In emission reduction technology, the use of solid adsorbents for CO 2 Separation by adsorption is considered to be a promising technology. And calcium-based adsorbent as a high-temperature CO 2 Solid adsorbents have attracted extensive attention from scholars all over the world due to their advantages of cheap raw materials, strong adsorption capacity and fast adsorption rate. [0004] For the use of calcium cycling for CO 2 The most suitable technology currently recognize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01D53/02B01D2257/504B01J20/041B01J20/06B01J20/08B01J20/20B01J2220/42B01J2220/4825Y02C20/40
Inventor 胡迎超刘文强徐明厚孙健杨新伟王文煜陈洪强
Owner HUAZHONG UNIV OF SCI & TECH
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