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Wet-grinding modified lithium metasilicate, preparation method thereof and application of wet-grinding modified lithium metasilicate used as adsorbent

A technology of wet grinding and lithium silicate, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve problems such as poor cycle stability and low adsorption efficiency of carbon dioxide adsorbents, and achieve optimized surface morphology , enhance the effect, eliminate the effect of static electricity

Active Publication Date: 2019-10-01
HUAZHONG UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

[0006] The invention solves the technical problems of low adsorption efficiency and poor cycle stability of the carbon dioxide adsorbent in the prior art

Method used

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  • Wet-grinding modified lithium metasilicate, preparation method thereof and application of wet-grinding modified lithium metasilicate used as adsorbent
  • Wet-grinding modified lithium metasilicate, preparation method thereof and application of wet-grinding modified lithium metasilicate used as adsorbent
  • Wet-grinding modified lithium metasilicate, preparation method thereof and application of wet-grinding modified lithium metasilicate used as adsorbent

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Embodiment 1

[0046] The invention provides a modification method based on wet grinding that can obtain a high-performance lithium silicate adsorbent, comprising the following steps:

[0047] (1) Take a certain amount of lithium carbonate and silica sol (30% SiO 2 Aqueous solution) after wet mixing, put it into a constant temperature water bath and continue to stir until it is completely evaporated to dryness. Put the obtained solid into a corundum boat and calcinate it in a muffle furnace at 900°C for 4 hours. After taking it out, it is ground and sieved to obtain Li 4 SiO 4 The original powder of the adsorbent is ready for use;

[0048] (2) if figure 1 As shown, weigh 4g and add it into the ball mill tank as it is, and add quantitative deionized water to the tank according to the solid-liquid ratio of 1:1, and finally add grinding balls according to the ball-to-material ratio of 12:1; Grinding modification method for comparison, at the same time weigh the same amount of the original an...

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Abstract

The invention relates to wet-grinding modified lithium metasilicate, a preparation method thereof and application of the wet-grinding modified lithium metasilicate used as an adsorbent and belongs tothe technical field of preparation and improvement of the adsorbent. The preparation method comprises the steps that a silicon source and a lithium source are calcined to obtain lithium metasilicate,the lithium metasilicate is placed in a grinding tank, deionized water is added, the lithium metasilicate is subjected to wet-grinding, and the surface of the lithium metasilicate is subjected to a water activity reaction to generate lithium hydroxide; after wet-grinding is ended, a ground product is dried, so that the lithium hydroxide is separated out in a nano sheet shape and attached and stacked to the surfaces of lithium metasilicate particles, and the wet-grinding modified lithium metasilicate is obtained. According to the modification method, the cost and feasibility are guaranteed, thegrinding modification effect is greatly improved, when applied to adsorption for carbon dioxide, the wet-grinding modified lithium metasilicate has the adsorption performance superior than that of atraditional dry-method grinding modified adsorbent, and a good prospect and basis are provided for industrial application in modification of the lithium-based adsorbent.

Description

technical field [0001] The invention belongs to the technical field of preparation and improvement of adsorbents, and more specifically relates to a wet grinding modified lithium silicate, a preparation method thereof and an application as an adsorbent. Background technique [0002] Since the industrial revolution, due to the large amount of CO emitted by the burning of fossil fuels 2 lead to atmospheric CO 2 The concentration has risen to 411ppm, and the greenhouse effect and global warming caused by it have become one of the most serious global environmental problems faced by human beings, and have attracted more and more attention from the international community. To address this crisis, reducing industrial sources of CO 2 emissions, carbon capture and storage (CCS) has been proposed. [0003] Among the many carbon capture technologies, the use of solid adsorbents for CO 2 The post-combustion capture process with cyclic adsorption-desorption is considered to be a prom...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2257/504B01J20/04B01J20/041B01J20/28054B01J20/3021B01J20/3078Y02C20/40
Inventor 杨远东刘文强徐明厚童贤靓操吉学李秋婉
Owner HUAZHONG UNIV OF SCI & TECH
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