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Preparation method and application of calcium oxide based absorbing material using diatomite as carrier

An absorption material, diatomite technology, applied in chemical instruments and methods, through adsorption, other chemical processes, etc., can solve problems that have not been seen yet, achieve improved cycle absorption stability, reduce environmental treatment costs, and reduce CO2 emissions Effect

Inactive Publication Date: 2012-07-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, it has not been seen to use the cheap natural mineral diatomaceous earth as a carrier to prepare high-temperature CO 2 Reports on invention patents and research literature of calcium oxide-based absorbent materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: The preparation method and application of the calcium oxide-based absorbent material with diatomaceous earth as the carrier, the specific content is as follows:

[0024] (1) The Yunnan Pioneer diatomite was roasted at 200°C for 4 h;

[0025] (2) Add 15ml of Na 2 CO 3 The solution is impregnated with 1.5g of diatomaceous earth for 2h, and then 15ml of CaCl 2 The solution was added to the impregnation mixture, stirred for 1 hour, filtered with suction, dried at 100°C, and then calcined at 750°C for 2 hours to obtain a calcium oxide-based absorbent material with a loading capacity of 30%, in which Na 2 CO 3 The concentration of the solution is 0.5mol / L, CaCl 2 The concentration of the solution is 1mol / L.

[0026] (3) Put the prepared calcium oxide-based absorbent material into a thermogravimetric analyzer, 2 :N 2 =1 (molar ratio) in the atmosphere, the temperature was raised from 40°C to 820°C at a heating rate of 10K / min, and the CO was kept at a cons...

Embodiment 2

[0028] Embodiment 2: The preparation method and application of the calcium oxide-based absorbent material with diatomaceous earth as the carrier, the specific content is as follows:

[0029] (1) The Yunnan Pioneer diatomite was roasted at 350°C for 3 h;

[0030] (2) Add 15ml of Na 2 CO 3 The solution is impregnated with 1.5g of diatomaceous earth for 2h, and then 15ml of CaCl 2 The solution was added to the impregnation mixture, stirred for 1 hour, filtered with suction, dried at 100°C, and then calcined at 700°C for 4 hours to obtain a calcium oxide-based absorbent material with a loading capacity of 30%, in which Na 2 CO 3 The concentration of the solution is 1.5mol / L, CaCl 2 The concentration of the solution is 2mol / L.

[0031] (3) Put the prepared calcium oxide-based absorbent material into a thermogravimetric analyzer, 2 :N2 =1 (molar ratio) in the atmosphere, the temperature was raised from 40°C to 820°C at a heating rate of 10K / min, and the CO was kept at a consta...

Embodiment 3

[0033] Embodiment 3: The preparation method and application of the calcium oxide-based absorbent material with diatomaceous earth as the carrier, the specific content is as follows:

[0034] (1) The Yunnan Pioneer diatomite was roasted at 500°C for 2 h;

[0035] (2) Add 12ml of Na 2 CO 3 The solution was impregnated with 1.5g of diatomaceous earth for 4h, and then 24ml of CaCl 2 The solution was added to the impregnation mixture, stirred for 2 hours, suction filtered, dried at 100°C, and then calcined at 650°C for 8 hours to obtain a calcium oxide-based absorbent material with a loading capacity of 30%, in which Na 2 CO 3 The concentration of the solution is 2.5mol / L, CaCl 2 The concentration of the solution is 0.5mol / L.

[0036] (3) Put the prepared calcium oxide-based absorbent material into a thermogravimetric analyzer, 2 :N 2 =5 (molar ratio) in the atmosphere, the temperature was raised from 40°C to 700°C at a heating rate of 10K / min, and the CO was kept at a const...

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Abstract

The invention discloses a preparation method of calcium oxide based absorbing materials using diatomite as carriers. The preparation method uses natural minerals diatomite as the carriers and supported calcium oxide based materials are synthesized through impregnation and precipitation methods. Under high-temperature conditions, the calcium oxide based materials prepared by adopting the method can absorb CO2 in mixed gas of CO2 and N2. Compared with the prior art, the carrier material, i.e. the diatomite used in the method is cheap and is easy to obtain, the prepared adsorbents have the advantages of high CO2 absorbing capacity and high adsorbing stability in the multi-time circulation process, the greenhouse effect is relieved, the CO2 emission is reduced and the environmental improvement cost is reduced.

Description

technical field [0001] The invention relates to a preparation method and application of a calcium oxide-based absorbent material with diatomite as a carrier, which belongs to the absorption and separation of high-temperature CO emitted from power plants and flue gases. 2 field. Background technique [0002] In recent years, with the rapid economic development of various countries, CO 2 Emissions are increasing by CO 2 The resulting greenhouse gas effect has attracted worldwide attention. CO emissions from fossil fuel thermal power plants 2 The amount of CO caused by various human activities accounts for about 2 More than 30% of the total emissions are CO 2 The largest stationary source of emissions, so control and recovery of CO emitted by thermal power plants 2 It is of great significance to solve the problem of greenhouse effect. Due to the high temperature of the gas discharged from high-temperature furnaces such as thermal power plants, the CO in the flue gas 2 T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/32B01J20/14
CPCY02C10/08Y02C20/40
Inventor 陕绍云贾庆明蒋丽红王亚明彭金辉
Owner KUNMING UNIV OF SCI & TECH
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