Preparation method of efficient sodium-based solid decarburization adsorbent

Abstract

The invention discloses a preparation method of an efficient sodium-based solid decarburization adsorbent. Pre-treatment including washing, roasting and grinding is conducted on a gamma aluminium oxide carrier; an incipient-wetness impregnation method is adopted, wherein the carrier is impregnated in dopant impregnation liquid with the electrolyte cation concentration of 0.1-2.0 mol/L for 6-8 hours, and then the carrier is subjected to drying, roasting and grinding for standby use; a modified carrier obtained in the last step is impregnated in an isovolumetric sodium carbonate solution with the concentration of 0.8-3.8 mol/L for 6-8 hours and subjected to drying, roasting and grinding for standby use; furthermore, a modified adsorbent is impregnated in another sodium-based amino secondaryactive component solution for 6-8 hours and subjected to drying, roasting and grinding, and finally, the target adsorbent is obtained. The adsorbent is mainly applied to thermal power plant tail smokecarbon dioxide purification, and the adsorption/desorption conditions are mild; meanwhile,the adsorbent has the advantages that the preparation method is simple, raw materials are cheap and easy to obtain, large-scale production is feasible, the adsorbent is stable in structure, all components are evenly dispersed, and the decarburization performance is efficient and stable and the like.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide emission reduction, and relates to a preparation method of a high-efficiency sodium-based solid decarbonization adsorbent. Background technique [0002] In recent years, the greenhouse effect and a series of environmental problems derived from it have increasingly become the focus of the international community. As the most important greenhouse gas, CO 2 The large amount of emissions is an important reason for the continuous aggravation of the greenhouse effect. To this end, the "Paris Agreement" pointed out that by 2030, global carbon emissions should drop from 50 billion tons in 2010 to 40 billion tons. In order to achieve this goal, all countries have a long way to go to reduce carbon emissions. [0003] my country's economy is still in the stage of rapid and stable development, and there is a great demand for energy, of which coal still accounts for more than 60%. In order to achieve...

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Problems solved by technology

[0007] However, the main bottleneck in the development of sodium-based solid adsorbent decarburization technology is that the carbonation reaction activity of sodium carbonate itself is not high, the reaction rate is low, and the reaction conversion rate is not high. The consumption is high, the combination of active components, dopants and the surface of the carrier is not tight enough, and the dispersion is not uniform enough

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