Lithium silicate ceramic material absorbing high-temperature carbon dioxide and preparation method thereof

A technology of carbon dioxide and ceramic materials, which is applied in the field of preparation of lithium silicate ceramic materials, can solve the problems of high sintering temperature and low carbon dioxide adsorption rate, and achieve the effects of low sintering temperature, easy industrial production, and simple process

Inactive Publication Date: 2012-10-17
(CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defects of high sintering temperature and low adsorption rate of carbon dioxide in existing lithium silicate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Use an electronic balance to weigh SiO 2 20.25g, Li 2 CO 3 48.75g, K 2 CO 3 It is 0.917g, put it into a mortar, grind it to make it powdery and reach the micron level, and then put it into a high-temperature resistance furnace for sintering at 750 ° C, and keep it warm for 2 hours and 6 hours respectively to obtain a silicic acid that absorbs high-temperature carbon dioxide lithium ceramic material.

[0014] Fully grind the prepared K-doped lithium silicate ceramic material, put it into a thermogravimetric analyzer in the range of room temperature to 900°C, and keep the temperature at 750°C for 20 minutes to test its adsorption capacity for carbon dioxide. At equilibrium, the adsorption rates are 14.31wt% and 22.62wt%, respectively.

Embodiment 2

[0016] Referring to Example 1, the sample was weighed and ground, and sintered in a high-temperature furnace at 850°C, kept for 2 hours and 6 hours respectively, and then the obtained sample was also ground and tested under the same conditions. When the absorption equilibrium was reached, the adsorption The ratios are 20.73wt% and 27.88wt% respectively.

Embodiment 3

[0018] Referring to Example 1, the sample was weighed and ground, and sintered in a high-temperature furnace at 900°C, kept for 2 hours and 6 hours respectively, and then the obtained sample was also ground and tested under the same conditions. When the absorption equilibrium was reached, the adsorption The ratios are 36.28wt% and 49.69wt% respectively.

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Abstract

The invention relates to a lithium silicate ceramic material absorbing high-temperature carbon dioxide and a preparation method of the lithium silicate ceramic material absorbing high-temperature carbon dioxide. The lithium silicate ceramic material absorbing high-temperature carbon dioxide is characterized by comprising the raw materials by weight percent: 12.41-28.9% of SiO2, 30.52%-71.1% of Li2CO3 and 0-57.07% of K2CO3. The preparation method of the lithium silicate ceramic material absorbing high-temperature carbon dioxide comprises the following steps of: mixing the raw materials according to the proportion, putting in a mortar and grinding, putting the ground raw materials into a high-temperature resistor furnace, and calcining under high temperature of 600DEG C to 1000DEG C for 0.5h-8h to obtain the lithium silicate ceramic material absorbing high-temperature carbon dioxide, so that the potassium-doped lithium silicate ceramic material can be synthesized. The material provided by the invention can directly absorb a mass of high-temperature carbon dioxide discharged out by a tail gas fuel in the cement kiln, the glass factory and the like. Compared with the prior art, the potassium-doped lithium silicate ceramic prepared by the preparation method is higher in the carbon dioxide absorbing efficiency, and higher in the carbon dioxide use ratio.

Description

Technical field [0001] The invention relates to a preparation method of a lithium silicate ceramic material for absorbing high-temperature carbon dioxide. Carbon dioxide gas is directly absorbed. Background technique [0002] At present, fossil fuels such as petroleum, natural gas, and coal are still the main energy materials in many industrial enterprises such as cement kilns, glass factories, and power plants, and a large amount of high-temperature carbon dioxide will be generated during the combustion of fossil fuels, which will intensify the greenhouse effect. There are many materials that can absorb carbon dioxide at room temperature, and the adsorption rate is also high. However, cooling high-temperature carbon dioxide to room temperature will inevitably greatly increase the cost of processing carbon dioxide. [0003] In 2001, Nakagawa and others from Japan's Toshiba Corporation successfully developed a lithium silicate ceramic material that absorbs carbon dioxide, b...

Claims

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Application Information

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IPC IPC(8): C04B35/16C04B35/622
Inventor 彭寿王芸彭程沈洪雪
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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