Preparation method for calcium-based CO2 sorbent

An adsorbent, calcium-based technology, applied in the direction of adsorption, chemical instruments and methods, other chemical processes, etc., can solve the problems of long time, high energy consumption, short time consumption, etc., to reduce energy consumption, good cycle adsorption/ The ability to desorb CO2, the effect of high energy consumption

Inactive Publication Date: 2012-11-21
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] The task of the present invention is to provide a calcium-based CO 2 The preparation method of the adsorbent, in order to overcome the problems of high energy consumption and long time consumption in the prior art, can quickly obtain the solid mixture, reduce the energy consumption of the preparation process, that is, it has the characteristics of low energy consumption and short time consumption, and makes the Calcium-based CO prepared by this method 2 The adsorbent has a good cycle adsorption / desorption of CO 2 ability, and has the ability to cyclically adsorb / desorb CO at high temperature 2 Stability, suitable for cyclic capture of CO at high temperature 2 specialty

Method used

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  • Preparation method for calcium-based CO2 sorbent
  • Preparation method for calcium-based CO2 sorbent
  • Preparation method for calcium-based CO2 sorbent

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Embodiment 1

[0029] according to figure 1 As shown in the process, first select 5 kinds of calcium precursors:

[0030] Calcium hydroxide (96%, Ajax Finechem),

[0031] Calcium D-gluconate (calcium D-gluconate monohydrate, 98%, Sigma),

[0032]Calcium L-lactate (calcium L-lactate hydrate, 98%, Fluka),

[0033] Calcium acetate hydrate (99%, Sigma-Aldrich), and

[0034] Nanosized calcium oxide (<160nm, 98%, Aldrich).

[0035] Choose 3 more inert carrier precursors:

[0036] cement,

[0037] Magnesium acetate (magnesium acetate tetrahydrate, >99%, Amresco)

[0038] Magnesium D-gluconate (magnesium D-gluconate hydrate, 98%, Sigma).

[0039] As shown in Table 1, at least one calcium precursor and at least one inert carrier precursor are selected and then mixed with water.

[0040] Among them, D-calcium gluconate, L-calcium lactate, calcium acetate, magnesium acetate, and D-magnesium gluconate are all water-soluble organic acid salts.

[0041] If only these precursors are used, a soluti...

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Abstract

The invention provides a preparation method for a calcium-based CO2 sorbent. The preparation method comprises the following steps: mixing calcium precursor and an inert carrier precursor with a solvent so as to obtain a mixed solution containing the calcium precursor and the inert carrier precursor; stirring the mixed solution so as to allow the calcium precursor and the inert carrier precursor to be evenly mixed; then drying the mixed solution with a spray dryer so as to obtain a solid; and finally calcining the solid to obtain the calcium-based sorbent used for capturing CO2. The calcium-based CO2 sorbent prepared by using the method has good cyclic CO2 adsorption/desorption capacity and stability in cyclic adsorption/desorption of CO2 at a high temperature, is suitable for cyclic capture of CO2 at a high temperature, and has the characteristics of low energy consumption and small consumption of time.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to calcium-based CO 2 Preparation method of adsorbent, in particular, it can be used for cyclic capture of CO at high temperature 2 calcium-based adsorbent. Background technique [0002] Calcium cycle to adsorb CO 2 The process mainly uses this reversible reaction. The positive reaction of this reaction is the carbonation reaction, which is divided into two stages: the early stage is the surface chemical reaction stage, and the later stage is the product layer diffusion control stage. The reverse of this reaction is the calcination of CaCO 3 process, that is, the CaO recycling process. Calcium cycle to adsorb CO 2 The range of applications is very wide, and its application areas include pre-combustion carbon capture, post-combustion carbon capture, and chemical heat pumps. For example, the calcium cycle adsorbs CO 2 for post-combustion CO capture 2 When, the CO in the flue g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/04
CPCY02C10/08Y02C20/40
Inventor 刘文强徐明厚
Owner HUAZHONG UNIV OF SCI & TECH
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