High-performance honeycomb activated carbon and preparation method thereof

Abstract

The invention belongs to the technical field of materials and discloses high-performance honeycomb activated carbon and a preparation method thereof. The preparation method comprises the following steps: weighing a carbon precursor polymer and a pore forming agent, mixing, adding a solvent and dissolving; weighing a plant-based biomass, weighing a chemical activator and a nitrogenous and phosphorous compound and adding the chemical activator and the nitrogenous and phosphorous compound into the prepared solution and immersing, and drying; forming carbon; immersing carbon in a chemical activator, drying for 2-48 h, and charing in the nitrogen atmosphere in a microwave high-temperature sintering furnace so as to obtain the high-performance honeycomb activated carbon. The invention has the following characteristics: yield of activated carbon is high; the preparation process is simple; cost of raw materials is low; and pore structure and surface functional groups are easy to control. The prepared activated carbon has excellent adsorption and can be widely applied in food engineering, chemical engineering, environmental protection and home.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a high-performance honeycomb activated carbon and a preparation method thereof. Background technique [0002] Adsorption is a unit operation that uses the microporous characteristics of solid media to selectively adsorb components. It is a relatively mature separation and purification method and is widely used in chemical, environmental protection, pharmaceutical and military fields. Among many adsorbent materials, activated carbon is widely used because of its strong adsorption capacity and low cost. [0003] Activated carbon is a kind of porous carbon material, which has the advantages of large specific surface area, wide source of raw materials, high mechanical strength, easy regeneration and good stability. Activated carbon is usually obtained by carbonizing and activating raw materials under certain conditions. The main purpose of carbonization is to obtain a...

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Problems solved by technology

[0004] The chemical activation method is to add chemicals to the raw materials, and then heat them in an inert gas medium to activate them; the most representative chemical activation methods are zinc chloride method, phosphate method, calcium chloride method and alkali method; but due to The use of chemicals will bring the following problems: highly corrosive to equipment; pollute the environment; chemicals remain in the activated carbon; a large amount of chemicals are consumed and the cost is high; an external heat source is required and the activation temperature is strictly controlled

The activated carbon prepared by this method has low wear resistance

[0009] There are many activated carbon products in the prior art, and they are used when absorbing moisture and odor at home; these products are generally made of wood; since wood raw materials have been restricted now, it is relatively difficult to obtain raw materials; in addition, the current activated carbon The product has no fragrance, so the function is relatively single, and it is difficult to meet the requirements of home use; the current wood flooring enterprises produce a large amount of sawn wood surface every day, which is generally waste; some enterprises burn it as fuel, which is actually It is wasted; there are also some enterprises that form and process it into fuel carbon rods after carbonization; but its added value is not very high; tea is a relatively common drink in my country, especially green tea, which has a large production and consumption

But the problem is: the shelf life of green tea is generally 18 months, and after the green tea is drunk, the tea dregs are thrown away and discarded; it is a pity

[0010] To sum up, the problems existing in the prior art are: during the preparation process, there are certain potential safety hazards, and the temperature control method is complicated; the degree of intelligence is low, and the entire preparation cycle is long;

[0013] The existing waste plant-based biomass activated carbon preparation methods are complex and inefficient, high cost, difficult to control pore structure and surface functional groups, and poor adsorption performance; waste cannot be rationally utilized

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