Method for preparing carbon dioxide capture material with coal gangue and polyethylene

Abstract

The invention relates to a method for preparing a carbon dioxide capture material by utilizing the technology that coal gangue is taken as a raw material to develop a new material, and loading polyethylene, which comprises the following steps that: the coal gangue is crushed and roasted at high temperature; acid is added and fully stirred; aluminum oxide in the coal gangue is reacted with hydrochloric acid to obtain a product solution containing aluminum chloride, silica is separated from aluminum ions by filtering to obtain an aluminum chloride filtrate, and the filtrate is further reacted to obtain polyaluminium chloride; residual solids obtained after filter contain the silica, and concentrated alkali is heated to prepare a silicate solution; and the polyethylene and the acid are used for deposition treatment, so that the polyethylene is deposited on silica particles to obtain mesoporous particles. The material has high cold compressive strength and room-temperature capture capability, and can be heated to 105 DEG C to release carbon dioxide; and then a composite material can continue to capture carbon dioxide to be repeatedly used.

Description

technical field [0001] The invention relates to a method for using coal gangue as a raw material to develop a new material technology and loading polyethyleneimine to prepare a carbon dioxide capture material. Background technique [0002] According to scientific observation and research, it is found that the increase of carbon dioxide can cause the temperature on the earth to become higher and higher, and this increase in temperature will bring many serious consequences, especially the impact on the earth's climate. Elevate etc. Industrial production is the main source of carbon dioxide emissions. Although people have realized the harm of carbon dioxide, it is difficult to control carbon emissions by inhibiting industrial development. In order to better eliminate carbon dioxide, scientists and technicians are working towards the development of carbon capture and storage technologies. . [0003] CO 2 At present, there are mainly two methods of capture technology, chemica...

AI Technical Summary

Problems solved by technology

However, thermal decomposition requires a lot of energy, and the economic benefit is low.

Both carbon fiber and activated carbon are limited in the establishment of large-scale industrialized devices due to the insufficient development of mesopore structure and insufficient strength.

The specific surface of perlite is relatively small, the adsorption effect is poor, and the feasibility is not high

Because zeolite is a crystal, the adsorption effect is not good, and because of the small pore size, it cannot be realized by loading polymers. It can only be realized by pressurization, and pressurized carbon dioxide can be directly liquefied, so the zeolite capture technology is limited.

Ammonia, ethanolamine and other amine compounds are widely used now, but due to the relative pollution, people are looking for a amine material that can be recycled

[0004] The industrial application of carbon dioxide capture technology is one of the possible ways to achieve energy saving and emission reduction. The biggest problem currently existing in carbon dioxide capture technology is that no suitable mesoporous materials can be found, so that carbon dioxide capture technology cannot be well developed. solve

Technicians have also adopted various technical means to develop and utilize coal gangue, but due to the complex composition of coal gangue, it is difficult to achieve effective separation, resulting in low added value of coal gangue, which cannot completely solve the problem of solid waste disposal of coal gangue

There are many studies on the development and utilization of coal gangue, such as the preparation of white carbon black from coal gangue, but there is no report on the use of coal gangue as a raw material to prepare carbon dioxide capture materials.

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