Carbon dioxide adsorbent and preparation method thereof

Abstract

According to the carbon dioxide adsorbent and the preparation method thereof disclosed by the invention, a calcium oxide / calcium aluminate compound is prepared by carrying out heat treatment on secondary aluminum ash and carbide slag, the calcium oxide / calcium aluminate compound is used as the carbon dioxide adsorbent and has relatively high adsorption capacity and stability, and the adsorbent can be regenerated or used for other purposes. According to the method, detoxification and resource conversion of dangerous / solid waste can be achieved, the obtained calcium-based compound can be applied to carbon dioxide capture and solidification, and great environmental protection benefits and application prospects are shown.

Description

Technical field: [0001] The invention relates to the technical field of carbon capture and solid waste resource utilization, in particular to a carbon dioxide adsorbent and a preparation method thereof. Background technique: [0002] With the development of society, the carbon dioxide content in the environment has gradually increased, resulting in a serious threat to the climate. With the proposal of the strategic goal of "carbon peaking and carbon neutrality" in my country, how to save energy and reduce emissions and realize the efficient capture, utilization and storage of carbon dioxide is very important. Currently, calcium-based adsorbents for carbon dioxide capture show obvious advantages, such as their wide sources, low cost, non-toxicity to the environment, and the ability to cyclically capture carbon dioxide through carbonation / calcination adsorption-desorption processes. However, calcium-based adsorbents also show certain deficiencies. During the cyclic adsorption...

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Problems solved by technology

[0005] It can be seen that the current calcium-based carbon dioxide adsorbent obtained from calcium carbide slag has the disadvantages of low adsorption capacity and poor cycle stability. By modifying the calcium oxide-based adsorbent, its performance can be improved to a certain extent, but the current The modification method has cumbersome steps, complicated procedures, and large additional investment