Method for preparing lithium silicate serving as high-temperature CO2 absorbing material
An absorbing material, lithium silicate technology, applied in silicates, alkali metal silicates, chemical instruments and methods, etc., can solve problems that have not yet been seen, achieve environmental protection, reduce CO2 emissions, and low preparation costs. Effect
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[0028] Example 1
[0029] Taking lithium nitrate powder with a molar ratio of 4.2 and pretreated artificial zeolite as raw materials, lithium silicate precursor powder was prepared by ion exchange and sol-gel method, and then the precursor powder was calcined at 680°C for 4.5 hours The obtained lithium silicate powder. Put the prepared lithium silicate powder into the thermogravimetric analyzer, in the CO 2 : N 2 =1 (molar ratio) in an atmosphere with a heating rate of 10K / min from 40°C to 635°C (absorption temperature), and constant temperature for 45min for CO 2 Absorption reaction to get CO 2 The absorption capacity is 21.89%.
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[0030] Example 2
[0031] Referring to Example 1, a lithium silicate material was prepared, and the lithium silicate material was placed in a thermogravimetric analyzer for CO 2 Absorption reaction, the different roasting temperature is 700℃, and CO is obtained 2 The absorption capacity is 16.53%.
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[0032] Example 3
[0033] Referring to Example 1, a lithium silicate material was prepared, and the lithium silicate material was placed in a thermogravimetric analyzer for CO 2 Absorption reaction, the difference is that the calcination temperature is 850℃ to obtain CO 2 The absorption capacity is 18.65%.
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