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Process for preparing active reed carbon

A preparation process and active technology, applied in the field of preparation of activated carbon, to achieve the effect of strong adsorption capacity, large specific surface area, and many pores

Inactive Publication Date: 2007-10-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no preparation process for making activated carbon from grass

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0014] Process flow of the present invention is as shown in the accompanying drawing. The production process of activated carbon is as follows: crushing and screening - carbonization - activation by gas activation method or chemical activation method - washing, dehydration, drying - making products. The specific steps are:

[0015] (1) intercepting the stem of grass grass and carrying out highly crushing and screening to obtain a fine powder of 0.5--1.10cm;

[0016] (2) Carbonization, the powder is heated and dry-distilled under the condition of isolating the air to reduce the non-carbon components in it, firstly controlled at 270-290 ° C, dehydration, deacidification and other decomposition reactions occur, and then heated to 320-380 ° C, the raw materials The -O- bond in is broken to generate H 2 O, CO, CO 2 Wait for the gas to be discharged, and form a bond between the aromatic nuclei, followed by dehydrogenation, a large number of direct bonds between the aromatic nucle...

Embodiment 2

[0021] The difference between this example and Example 1 is that the chemical activation method is used for activation, and zinc chloride or phosphoric acid is used as an activator. The raw materials are first crushed, screened to remove impurities, dried until the water content is lower than 30%, and then uniformly mixed with zinc chloride concentrated solution or phosphoric acid (the ratio is determined by the required pore size distribution), heated and carbonized at 300-370°C, Then heat to 600-700°C (lower than water vapor activation). Due to the strong water absorption of zinc chloride and phosphoric acid, the hydrogen and oxygen in the raw materials can be released mainly in the form of water vapor (rather than hydrocarbons), and less tar-like organic matter (the latter will cover the surface of the charcoal) and reduce its quality). After cooling, after washing (recovering zinc chloride or phosphoric acid), dehydration, drying, grinding and screening, it becomes powder...

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Abstract

The present invention provides a preparation method for active triarrhena carbon, which comprises the steps of that: (1)the stem of the triarrhena is crushed and screened to obtain fine powder of triarrhena stem with a size of 0.5~1.1 cm; (2)carbonizing, the powder is subjected to heating and dry distillation to execute degassing treatment under the condition of air isolated, then dehydration and deacidification decomposition reaction is executed at 270~290 DEG C, and then carbonizing reaction is executed at 320~380 DEG C for 4~5 hours so as to obtain the product with three dimensional structure and a certain initial pore; (3)the obtained product is activated to form active carbon powder after cooling, scrubbing, dehydration, drying, grinding and screening. Compared with the wood active carbon, the active triarrhena carbon of the present invention has the advantages of abundant mineral content, much pores, large specific surface area and stronger absorptive capacity; and can be widely used for removing contaminant of water, discoloring, filtering liquid and gas, and cleaning of air.

Description

technical field [0001] The invention relates to a wetland plant-grass activated carbon preparation process, which belongs to the technical field of activated carbon dioxide preparation. Background technique [0002] Activated carbon is a type of microcrystalline carbon material made of carbonaceous materials with a black appearance, developed internal pore structure, large specific surface area, and strong adsorption capacity. It is a commonly used adsorbent or catalyst carrier and is widely used. In almost all national economic sectors and people's daily life. [0003] The production of activated carbon is generally divided into two processes. The first step is carbonization. The raw material is dried at a temperature of 170°C to 600°C, and its organic tissue is carbonized at the same time; the second step is activation, which is carbonized in the first step. The carbonized material is sent into the reaction furnace, reacts with the activator and water vapor, completes the...

Claims

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Application Information

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IPC IPC(8): C01B31/10C01B31/12C10B53/02C01B32/336
CPCY02E50/14Y02E50/10
Inventor 张建聂玮张成禄史倩倩
Owner SHANDONG UNIV
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