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Preparation method of activated coke for flue gas desulfurization

A technology of activated coke and flue gas, applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of low sulfur capacity, easy oxidation, poor desulfurization effect, etc., and achieve improved sulfur capacity and desulfurization effect , the effect of broad application prospects

Inactive Publication Date: 2019-05-21
谭祖陆
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Problems solved by technology

[0008] The main technical problem to be solved by the present invention is to provide a preparation method of active coke for flue gas desulfurization in view of the defects of low sulfur capacity, easy oxidation and poor desulfurization effect when active coke is used in flue gas desulfurization.

Method used

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preparation example Construction

[0031] Preparation of activated coke powder: crush the lignite into lignite powder with a particle size of 2 mm, place it in a high-temperature airtight furnace, heat it up to 350°C under the protection of nitrogen, keep it warm until the lignite powder turns into a colloidal substance, and continue to heat up to 950°C, heat preservation treatment for 30 minutes, the resulting product was washed with petroleum ether and then dried naturally to obtain lignite semi-coke powder;

[0032] Concentration is 4.5mol / L ZnCl according to equal volume ratio 2 Solution and CuCl with a concentration of 0.5mol / L 2 The solution is mixed as a composite activator, and the lignite semi-coke powder is placed in the composite activator for immersion treatment for 10 minutes according to the mass ratio of 1:5, and then the impregnated lignite semi-coke powder is separated and placed in a high-temperature tube furnace. , activated at a temperature of 500°C for 2 hours to obtain activated coke powd...

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Abstract

The invention discloses a preparation method of activated coke for flue gas desulfurization, and belongs to the technical field of adsorbents. An electroless copper plating solution can generate reducing gases carbon monoxide and hydrogen under a heating condition, and the slowly released reducing gases make copper ions oxidized and precipitating on the surface of iron powder, so the activated coke does not react with sulfuric acid to avoid being penetrated and increase the sulfur capacity of the activated coke; the activated coke is doubly activated, parts of organic matters in the activatedcoke are hydrolyzed and degraded under the action of a zinc chloride and copper chloride composite activator in order to form an oligomer, reaction dehydration can promote the condensation and aromatization of an intermediate to form a graphite-like microcrystalline structure and produce a porous system in order to increase the sulfur capacity of the activated coke, and a prepared green powder isalso a catalytic oxidant, and can be combined with oxygen in the air to catalyze the oxidation of hydrogen sulfide, sulfur dioxide and the like into sulfur trioxide in order to improve the desulfurization effect of the activated coke, so the method has a broad application prospect.

Description

technical field [0001] The invention discloses a method for preparing active coke for flue gas desulfurization, which belongs to the technical field of adsorbents. Background technique [0002] Activated coke is a granular material with dual properties of adsorbent and catalyst. It has the characteristics of activated carbon, good adsorption and catalytic performance, stable chemical performance, regenerable and reusable. At the same time, it overcomes the shortcomings of activated carbon such as high price, low mechanical strength, and easy crushing. In the field of environmental water and air pollution control, it has more practical significance to replace activated carbon with activated coke. [0003] Activated coke is a special adsorbent with reasonable pore structure, moderate specific surface area and high compressive strength. It is mainly used for dry desulfurization and can be regenerated repeatedly during practical application. At present, there are not many type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/86B01D53/48B01J23/22
Inventor 谭祖陆
Owner 谭祖陆
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