a calcium-based co 2 Adsorbent preparation method and product thereof
An adsorbent and calcium-based technology, which is applied in the preparation of calcium-based CO2 adsorbent and its products, can solve problems such as excessive particle size and irregular microscopic appearance, and achieve high adsorption capacity, good cycle stability, and fast The effect of carbonation reaction rate
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[0059] In one aspect of the present invention, there is provided a calcium-based CO 2 The preparation method of adsorbent comprises the following steps:
[0060] Preparation of calcium oxide nanoparticles, magnesium oxide nanoparticles and aluminum oxide nanoparticles;
[0061] The calcium oxide nanoparticles, the magnesium oxide nanoparticles and the aluminum oxide nanoparticles are mixed and then ground to obtain the calcium-based CO 2 Adsorbent;
[0062] Wherein, the mixing of the calcium oxide nanoparticles, the magnesium oxide nanoparticles and the aluminum oxide nanoparticles includes: mixing the calcium oxide nanoparticles, the magnesium oxide nanoparticles and The aluminum oxide nanoparticles are mixed with a mass ratio of (75~85):10:10;
[0063] The calcium-based CO 2 The particle size of the adsorbent is 30-100nm.
[0064] Calcium-based CO provided by the present invention 2 In the preparation method of the adsorbent, calcium oxide nanoparticles, magnesium oxid...
Embodiment 1
[0101] In this embodiment, according to the calcium-based CO described in the present invention 2 The preparation method of adsorbent comprises the following steps:
[0102] (1) The preparation method of calcium oxide nanoparticles comprises the following steps:
[0103] Calcium nitrate tetrahydrate (precursor), citric acid monohydrate and deionized water are mixed in a molar ratio of 1:1:32 to obtain the first mixed solution;
[0104] Stir the first mixed solution at a temperature of 75° C. (constant temperature) for 3 hours until the first gel-like substance is formed;
[0105] The first gel-like substance was left to stand (aged) at a temperature of 18-31°C for 18 hours, then dried at a temperature of 75°C for 4 hours, and then dried at a temperature of 105°C for 11 hours to obtain the first Dry goods;
[0106] The first dried product was placed in a muffle furnace and ignited, and calcined at a temperature of 450°C for 1.5h (until it was burnt out), and the first dried ...
Embodiment 2
[0124] In this embodiment, according to the calcium-based CO described in the present invention 2 The preparation method of adsorbent comprises the following steps:
[0125] (1) The preparation method of calcium oxide nanoparticles comprises the following steps:
[0126] Calcium nitrate tetrahydrate (precursor), citric acid monohydrate and deionized water are mixed in a molar ratio of 1:1:36 to obtain the first mixed solution;
[0127] The first mixed solution was stirred at a temperature of 85°C (constant temperature) for 6 hours until the first gel-like substance was formed;
[0128] The first gel-like substance was left to stand (aged) at a temperature of 18-31°C for 20 hours, then dried at a temperature of 85°C for 6 hours, and then dried at a temperature of 115°C for 13 hours to obtain the first Dry goods;
[0129]The first dried product was placed in a muffle furnace and ignited, and calcined at a temperature of 550°C for 2 hours (until it was burnt out), and the firs...
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Abstract
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