Preparation method and application of calcium oxide based absorbing material using diatomite as carrier
An absorption material, calcium oxide technology, applied in chemical instruments and methods, through adsorption, other chemical processes, etc., can solve problems that have not yet been seen, and achieve the improvement of cycle absorption stability, reduction of environmental treatment costs, and mitigation of the greenhouse effect. Effect
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Embodiment 1
[0023] Example 1: The preparation method and application of the calcium oxide-based absorbent material using diatomaceous earth as a carrier, the specific content is as follows:
[0024] (1) Roast Yunnan Xianfeng diatomite at 200℃ for 4 hours;
[0025] (2) Put 15ml of Na 2 CO 3 The solution is immersed in 1.5g diatomaceous earth for 2h, and then 15ml CaCl 2 The solution was added to the impregnation mixture, stirred and reacted for 1 hour, filtered with suction, dried at 100°C, and calcined at 750°C for 2 hours to obtain a calcium oxide-based absorbent material with a load 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 the thermogravimetric analyzer, and place it in the CO 2 :N 2 =1 (molar ratio) in an atmosphere with a temperature rise rate of 10K / min, the temperature is increased from 40°C to 820°C, and the temperature is kept const...
Embodiment 2
[0027] Embodiment 2: The preparation method and application of the calcium oxide-based absorbent material using diatomaceous earth as a carrier, the specific content is as follows:
[0028] (1) Roast Yunnan Xianfeng Diatomite at 350℃ for 3 h;
[0029] (2) Put 15ml of Na 2 CO 3 The solution is immersed in 1.5g diatomaceous earth for 2h, and then 15ml CaCl 2 The solution was added to the impregnation mixture, stirred and reacted for 1 hour, filtered with suction, dried at 100°C, and calcined at 700°C for 4 hours to obtain a calcium oxide-based absorbent material with a loading capacity of 30%. 2 CO 3 The concentration of the solution is 1.5mol / L, CaCl 2 The concentration of the solution is 2mol / L.
[0030] (3) Put the prepared calcium oxide-based absorbent material into the thermogravimetric analyzer, and place it in the CO 2 :N 2 =1 (molar ratio) in an atmosphere with a temperature rise rate of 10K / min, the temperature is increased from 40°C to 820°C, and the temperature is kept consta...
Embodiment 3
[0031] Embodiment 3: The preparation method and application of the calcium oxide-based absorbent material using diatomaceous earth as a carrier, the specific content is as follows:
[0032] (1) Roast Yunnan Xianfeng diatomite at 500℃ for 2 h;
[0033] (2) Put 12ml of Na 2 CO 3 The solution is immersed in 1.5g diatomaceous earth for 4h, then 24ml CaCl 2 The solution was added to the impregnation mixture, stirred for 2h, filtered with suction, dried at 100°C, and calcined at 650°C for 8h to obtain a calcium oxide-based absorbent material with a loading capacity of 30%. 2 CO 3 The concentration of the solution is 2.5mol / L, CaCl 2 The concentration of the solution is 0.5mol / L.
[0034] (3) Put the prepared calcium oxide-based absorbent material into the thermogravimetric analyzer, and place it in the CO 2 :N 2 =5 (molar ratio) in an atmosphere, raise the temperature from 40°C to 700°C at a heating rate of 10K / min, and keep it constant for 45min to perform CO 2 Absorption reaction, the res...
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