Ytterbium-doped CO2 adsorbent and preparation method thereof
An adsorbent, ytterbium oxide technology, applied in the field of improvement and preparation of CO2 adsorbent, can solve the problem of unsatisfactory cycle adsorption performance of adsorbent, and achieve the effect of outstanding cycle stability, good cycle stability and developed pore structure
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[0032] The above CO 2 The preparation method of adsorbent comprises the following steps:
[0033] (1) Using methods such as normal temperature stirring, heating stirring or magnetic stirring, organic calcium salts (such as calcium formate, calcium acetate, calcium propionate, calcium lactate, calcium oxalate, calcium citrate, calcium gluconate, calcium malate or tartaric acid Calcium, etc.) and organic ytterbium salt (such as ytterbium acetate or ytterbium oxalate) are uniformly dissolved in water to prepare a mixed solution with a mass fraction of solute of 10% to 15%, so that the molar ratio of calcium and ytterbium in the mixed solution is 10.5 :1~66.9:1;
[0034](2) In the method of water bath, oil bath or baking, heat the mixed solution prepared in the step (1) at 45°C to 120°C (preferably 85°C to 110°C) to obtain a mixed solid of organic salt, such that At the same time of water removal, the organic salt mixed solid will not be destroyed by excessive boiling. The speci...
Embodiment 1
[0038] (1) First, calcium acetate and ytterbium acetate were stirred and dissolved in water at room temperature to obtain a uniformly mixed clear solution with a total mass fraction of 14.4%, wherein the mass ratio of calcium acetate to ytterbium acetate was 4.4:1.
[0039] (2) 200 mL of the clear solution was dried in an oven at 110° C. for 12 h. Grind and sieve the dried solid to a size below 500 μm.
[0040] (3) Take 1g of the sieved powder and place it in a muffle furnace, raise the temperature from room temperature to 900 °C at a rate of 15 °C / min in an air atmosphere, and keep it for 0.5 h, then cool to room temperature to obtain doped ytterbium oxide (25wt.%) calcium-based adsorbent.
Embodiment 2
[0042] Repeat Example 1 with the same steps described above, the difference is that the mass ratio of calcium acetate to ytterbium acetate is 5.87:1, and a calcium-based adsorbent doped with ytterbium oxide (20wt.%) is prepared.
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