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Oxygen functional group-enriched carbon adsorbing material and preparation method and application thereof

A technology rich in oxygen functions and oxygen functional groups, applied in chemical instruments and methods, other chemical processes, gas treatment and other directions, can solve the problems of low temperature mercury removal efficiency, etc., and achieve cheap raw materials, simple and controllable processes, and easy raw materials. the effect

Inactive Publication Date: 2018-04-20
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the existing research results, the currently reported carbon materials generally have the disadvantages of no oxygen-containing functional groups on the surface and low mercury removal efficiency at low temperature.

Method used

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  • Oxygen functional group-enriched carbon adsorbing material and preparation method and application thereof
  • Oxygen functional group-enriched carbon adsorbing material and preparation method and application thereof
  • Oxygen functional group-enriched carbon adsorbing material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Grind semi-coke particles into 280-mesh coal powder; mix 120 g of coal powder with 30 g of starch and 20 g of deionized water at a stirring speed of 500 r / min, and then use a flat-die rolling granulator at 20 MPa Extruded into a cylindrical shape under pressure to obtain shaped carbon;

[0030] The above formed carbon was carbonized in a high-temperature tube furnace from room temperature to 700 °C for 2 h, then the temperature was raised to 830 °C, 20 mL / min of water vapor was introduced to activate for 1 h, and the temperature was naturally cooled to room temperature to obtain a carbon material;

[0031] Slowly drop 50 mL of concentrated nitric acid into 120 mL of deionized water, and cool the resulting solution to room temperature for later use;

[0032] Add 30 g of the above-mentioned carbon material and 70 mL of the above-mentioned acid solution into a three-necked flask. Then the remaining acid solution (100 mL) was dropped into the three-necked flask through the...

Embodiment 2

[0035] The semi-coke particles are ground into 250 mesh coal powder; 140 g of fine powder is mixed with 45 g of epoxy resin and 30 g of deionized water at a stirring speed of 400 r / min, and then rolled and granulated with a flat die at 30 Extruded into a cylindrical shape under MPa pressure to obtain shaped carbon;

[0036] The above formed carbon was carbonized in a high-temperature tube furnace from room temperature to 600 °C for 3 h, then the temperature was raised to 890 °C, 15 mL / min of water vapor was introduced to activate for 1.5 h, and the temperature was naturally cooled to room temperature to obtain a carbon material;

[0037] Slowly drop 75 mL of concentrated sulfuric acid into 90 mL of deionized water, and cool the resulting solution to room temperature for later use;

[0038] Add 45 g of the above-mentioned carbon material and 110 mL of the above-mentioned acid solution into a three-necked flask. Then, the remaining mixed acid solution (55 mL) was added into the...

Embodiment 3

[0041] The semi-coke particles are ground into coal powder of 230 mesh; 160 g of fine powder, 60 g of resole phenolic resin, and 40 g of deionized water are mixed evenly at a stirring speed of 600 r / min, and then a flat die rolling granulator is used at 40 Extruded into a cylindrical shape under MPa pressure to obtain shaped carbon;

[0042] The above formed carbon was carbonized in a high-temperature tube furnace from room temperature to 500 °C for 4 h, then the temperature was raised to 950 °C, activated by 10 mL / min water vapor for 3 h, and naturally cooled to room temperature to obtain a carbon material;

[0043] Slowly drop 100 mL of concentrated nitric acid into 60 mL of deionized water, and cool the resulting solution to room temperature for later use;

[0044]Add 60 g of the above-mentioned carbon material and 120 mL of the above-mentioned acid solution into a three-necked flask. Then the remaining acid solution (40mL) was added into the three-neck flask through the c...

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Abstract

The invention discloses an oxygen functional group-enriched carbon adsorbing material and a preparation method and application thereof. The preparation method is characterized by comprising the following steps: with blue carbon particles as subjects, and an adhesive and deionized water as objects, sequentially mixing, moulding, carbonizing and performing water vapor activation to obtain a porous carbon material; finally, oxidizing by using strong acid to form the oxygen functional group-enriched carbon adsorbing material, wherein the carbon adsorbing material comprises the following raw materials in parts by weight: 60-80 parts of the blue carbon particles, 15-30 parts of the adhesive and 10-20 parts of the deionized water; the ratio of the used strong acid to the used carbon material is as follows: each 10-100g of the carbon material uses 50-100mL of strong acid. According to the oxygen functional group-enriched carbon adsorbing material provided by the invention, the raw materials are cheap and easy to access, the process is simple and controllable, the operating condition is mild, and the mercury removing rates of the obtained oxygen-enriched carbon adsorbing material are higherthan 70% at different temperatures.

Description

technical field [0001] The invention relates to a carbon adsorption material rich in oxygen functional groups, a preparation method and application thereof, and belongs to the technical field of preparation of carbon adsorption materials. Background technique [0002] Mercury emissions and pollution caused by coal combustion have attracted widespread attention from the international community in recent years. Zero-valent mercury (Hg 0 ) is oxidized to divalent mercury (Hg 2+ ), followed by combined removal through existing air pollution control devices, is currently the best way to remove Hg 0 better way. In recent years, metal / metal oxide-based mercury removal catalysts have been widely used in industry, and Hg 0 Catalytic oxidation to Hg 2+ . However, the exhaust gas temperature of existing coal-fired boilers is mainly concentrated at 100-150 °C. Therefore, the study of new high-efficiency low-temperature mercury removal materials has become an important task of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01D53/02B01D2257/602B01J20/20
Inventor 张长明杨建伟张小超宋雯高颖李瑞
Owner TAIYUAN UNIV OF TECH
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