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Preparation method of high-temperature calcium-based CO2 absorbing material

An absorption material, calcium-based technology, which is applied in the field of preparation of high-temperature calcium-based CO2 absorption materials, can solve problems that have not yet been seen, and achieve the effects of reducing emissions, simple preparation process and low cost

Inactive Publication Date: 2013-12-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, no CaO-based high-temperature CO 2 Reports on invention patents and research literature of absorbent materials

Method used

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  • Preparation method of high-temperature calcium-based CO2 absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, the red mud and egg shells were ball-milled in a ball mill for 2 hours, and then passed through a 40-mesh sieve, and then the ground red mud and citric acid with a mass concentration of 8wt% were mixed according to the liquid-solid ratio (mL / g) of 60:1. The solution was acid leached at 40°C for 4 hours. The red mud after acid leaching was washed with deionized water and mixed with egg shells calcined at 900°C. The mass of red mud accounted for 10wt%, and then the mixture was placed in a mortar and added with water. Grind until fully mixed, and then dry at 80°C for 2 hours to obtain high-temperature calcium-based CO 2 absorbent material.

[0025] For the above high temperature calcium-based CO 2 When the absorption material is tested for its adsorption capacity, it goes through the following steps: the high-temperature calcium-based CO 2The absorbing material was placed in a thermogravimetric analyzer, under N 2 In the atmosphere, the temperature was raised to ...

Embodiment 2

[0027] Referring to Example 1, the difference is that when red mud is mixed with egg shells, the mass of red mud accounts for 15wt%, and the measured CO 2 The absorption capacity is 26.24%.

Embodiment 3

[0029] With reference to example 1, difference is that the mass concentration of citric acid solution is 14wt%, measures CO 2 The absorption capacity is 27.07%.

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Abstract

The invention provides a preparation method of high-temperature calcium-based CO2 absorbing material. The method includes: milling red mud and egg shell in a ball mill, screening, acid-leaching ground red mud and citric acid solution at the same temperature of 20-60 DEG C, mixing the acid-leached red mud and egg shell, adding water to mill the mixture, mixing well, and drying to obtain the high-temperature calcium-based CO2 absorbing material. The preparation method has the advantages that the cost of raw materials is low, the preparation process is simple, the material can absorb CO2 at high temperature directly so that carbon resource is recovered, the preparation method is easy for industrial production and treating waste with waste is achieved.

Description

technical field [0001] The invention relates to a high-temperature calcium-based CO2 mixed with red mud with egg shell as calcium source 2 The invention relates to a preparation method of an absorbing material, which belongs to the technical field of carbon dioxide treatment. Background technique [0002] Red mud is the polluting waste slag discharged when the aluminum industry extracts alumina. Generally, 1 to 2 tons of red mud is produced for every ton of alumina produced. At present, the treatment of red mud is generally piled up in stockpiles or low-lying places. , Occupy a large amount of land and cause pollution to the surrounding environment. Its composition varies with the composition of the raw ore and the method of aluminum production, and the main component is Al 2 o 3 , CaCO 3 and SiO 2 , and a small amount of oxides of magnesium, iron, titanium, etc. In the industry, it is mainly used as refractory clay, construction, cement ingredients, ceramic tiles, etc...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30B01D53/02
Inventor 陕绍云胡易成贾庆明蒋丽红王亚明
Owner KUNMING UNIV OF SCI & TECH
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