Preparation method of lithium-based zirconate material for efficiently absorbing CO2 at high temperature
A technology based on zirconate and high temperature, which is applied in the field of preparation of lithium-based zirconate materials, can solve the problems of difficult control of solvent evaporation rate and poor repeatability of the preparation process of lithium zirconate materials, and achieves easy industrial production and excellent absorption performance. , the effect of simple operation process
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Embodiment 1
[0031] Weigh 26.73g of zirconium oxynitrate and 11.04g of lithium nitrate, add them to a beaker, and dissolve them with an appropriate amount of deionized water to obtain a solution; weigh 60.00g of soluble starch, add them to the prepared solution, heat and stir to dissolve, and obtain a mixed solution; Then add 30.03g of urea to the mixed solution, then add 1.39g of potassium carbonate, and stir at a constant temperature of 90°C for 6h to form a sol; the sol is aged at room temperature for one day, placed in a freeze dryer and freeze-dried to obtain a gel (the temperature of the cold trap -55~-65℃, drying pressure is 0~6.65×10 -2 mbar); the gel was calcined at 650° C. for 6 hours to obtain a lithium-based zirconate material with a particle size of 20-100 nm. The synthesized lithium-based zirconate material was heated at 550 °C and CO 2 The partial pressure is 0.25bar (the balance gas is N 2 ) to absorb CO 2 , the absorption equilibrium can be reached in about 14 minutes, ...
Embodiment 2
[0033]Weigh 26.73g of zirconium oxynitrate and 11.04g of lithium nitrate, add them into a beaker, and dissolve them with an appropriate amount of deionized water to obtain a solution; weigh 50.00g of soluble starch, add them to the prepared solution, heat and stir to dissolve, and obtain a mixed solution; Then add 30.03g of urea to the mixed solution, then add 1.39g of potassium carbonate, and stir at a constant temperature of 90°C for 6h to form a sol; the sol is aged at room temperature for one day, placed in a freeze dryer and freeze-dried to obtain a gel (the temperature of the cold trap -55~-65℃, drying pressure is 0~6.65×10 -2 mbar); the gel was roasted at 650°C for 6h to obtain a lithium-based zirconate material with a particle size of 20-100nm. 2 The partial pressure is 0.25bar (the balance gas is N 2 ) to absorb CO 2 , about 16 minutes to reach absorption equilibrium, CO 2 Equilibrium absorption up to 23.6wt.%, see the results figure 2 .
Embodiment 3
[0035] Weigh 26.73g of zirconium oxynitrate and 11.04g of lithium nitrate, add them into a beaker, and dissolve them with an appropriate amount of deionized water to obtain a solution; weigh 40.00g of soluble starch, add them to the prepared solution, heat and stir to dissolve, and obtain a mixed solution; Then add 30.03g of urea to the mixed solution, then add 1.39g of potassium carbonate, and stir at a constant temperature of 90°C for 6h to form a sol; the sol is aged at room temperature for one day, placed in a freeze dryer and freeze-dried to obtain a gel (the temperature of the cold trap -55~-65℃, drying pressure is 0~6.65×10 -2 mbar); the gel was calcined at 650° C. for 6 hours to obtain a lithium-based zirconate material with a particle size of 20-100 nm. The synthesized lithium-based zirconate material was heated at 550 °C and CO 2 The partial pressure is 0.25bar (the balance gas is N 2 ) to absorb CO 2 , about 16 minutes to reach absorption equilibrium, CO 2 Equil...
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