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Activated coke for absorbing dioxin in flue gas and preparation method thereof

A technology of activated coke and flue gas, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of low cost and high macropore content, and achieve low cost, high yield, and improved wettability

Active Publication Date: 2015-04-22
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide an activated carbon adsorbent with high meso-macropore content and low cost required for the adsorption of dioxins in flue gas, and to provide a method for the adsorption of persistent organic pollutants such as dioxins in flue gas Active coke and its preparation method

Method used

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  • Activated coke for absorbing dioxin in flue gas and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] The coal semi-coke is pulverized and sieved into 80-mesh powder for later use. A complex surfactant solution was prepared by dissolving 0.25g sodium fatty alcohol polyoxyethylene ether sulfonate and 1.25g isopropanol in 48.5mL water. Dissolve 347.8g of NaOH (200g of Na ions) in an appropriate amount of water and mix with the above composite surfactant solution, stir and add water to adjust the volume of the solution to 5L.

[0030] Then, weigh 1Kg of pulverized semi-coke, immerse in 5L of activator impregnation solution, filter and separate after 4h. The impregnated semi-coke was naturally dried at room temperature to a moisture content of 20%, and then placed in a carbonization furnace with N 2 Activation treatment at 900°C for 3.5h under protection, and in N 2 Protected cooling treatment until the temperature is lowered to below 100°C to prepare activated coke for the adsorption of dioxins in flue gas. The adsorption value of activated pyromethylene blue is determi...

Embodiment 2

[0032] The coal semi-coke is pulverized and sieved into 80-mesh powder for later use. Dissolve 0.25g of sodium fatty alcohol polyoxyethylene ether sulfonate and 1.25g of isopropanol in 48.5mL of water to prepare a composite surfactant solution. 460.9g Na 2 CO 3 (200g of Na ions) was dissolved in an appropriate amount of water and added to the above composite surfactant solution, stirred and added water to adjust the volume of the solution to 5L.

[0033] Then, weigh 1Kg of pulverized semi-coke, immerse in 5L of activator impregnation solution, filter and separate after 4h. The impregnated semi-coke was naturally dried at room temperature to a moisture content of 20%, and then placed in a carbonization furnace with N 2 Activation treatment at 900°C for 3.5h under protection, and in N 2 Protected cooling treatment until the temperature is lowered to below 100°C to prepare activated coke for the adsorption of dioxins in flue gas.

Embodiment 3

[0035] The coal semi-coke is pulverized and sieved into 80-mesh powder for later use. Dissolve 0.5g sodium lignosulfonate and 1.0g ethanol in 98.5mL water to prepare composite surfactant solution. Dissolve 347.8g NaOH (Na ion 200g) with an appropriate amount of water and add the complex surfactant solution, stir and add water to adjust the volume of the solution to 5L.

[0036] Then, weigh 1Kg of pulverized semi-coke, immerse in 5L of activator impregnation solution, filter and separate after 4h. The impregnated semi-coke was naturally dried at room temperature to a moisture content of 20%, and then placed in a carbonization furnace with N 2 Activation treatment at 900°C for 3.5h under protection, and in N 2 Protected cooling treatment until the temperature is lowered to below 100°C to prepare activated coke for the adsorption of dioxins in flue gas.

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Abstract

The present invention relates to an activated coke for absorbing persistent organic pollutant like dioxin in flue gas and a preparation method thereof by using coal quality semi coke as a raw material. The preparation method is as follows: crushing the coal quality semi coke; impregnating the coal quality semi coke with an impregnating solution containing metal hydroxide or alkali metal carbonate activator and compound surfactant, and naturally drying; and finally activating the impregnated and dried semi coke at 800-950 DEG C to prepare the activated coke for absorbing dioxin in flue gas. The activated coke has characteristics of developed porous structure, low manufacturing cost and good adsorption effect, etc.

Description

technical field [0001] The invention relates to an activated coke prepared from blue carbon and a preparation method thereof, in particular to an active coke for the adsorption of flue gas dioxins prepared from low-rank coal semicoke and a preparation method thereof, belonging to metallurgical waste gas treatment and related The field of waste gas treatment. Background technique [0002] Dioxins, as persistent organic pollutants, are not only highly toxic, but also carcinogenic and mutagenic, and have genetic effects. As the "Stockholm Convention on Persistent Organic Pollutants (POPs)" (Stockholm Convention for short) came into force in my country on November 11, 2004, the flue gas produced by industrial processes such as waste incineration and metallurgy is persistent organic pollutants such as dioxins. Major source of organic pollutants (POPs). Although the removal of dioxins includes many methods such as physical adsorption and chemical decomposition, activated carbon a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
Inventor 李咸伟水恒福俞勇梅王知彩何晓蕾
Owner BAOSHAN IRON & STEEL CO LTD
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