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High-adsorbability activated semi-coke as well as preparation method and application thereof

An active semi-coke and high adsorption technology, which is applied in the field of coal chemical industry, can solve the problems of specific surface area difference and overall low level, and achieve the effect of low cost, good adsorption performance and high removal rate

Inactive Publication Date: 2017-05-10
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, according to the different preparation conditions, the specific surface area of ​​the prepared active semi-coke has obvious differences, but the overall is not high.
And the application of activated semi-coke to wastewater treatment and systematic research is relatively rare

Method used

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  • High-adsorbability activated semi-coke as well as preparation method and application thereof
  • High-adsorbability activated semi-coke as well as preparation method and application thereof
  • High-adsorbability activated semi-coke as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of high-adsorption active semi-coke includes the following steps:

[0035] Step 1: Crush the raw semi-coke: crush the raw semi-coke to semi-coke particles with a diameter of no more than 0.5mm; the specific process is: use the quarter method to reduce the sample, first use a jaw crusher to moderately crush, and then use a ball mill Crushing, and finally sieving the crushed semi-coke with 0.5mm, 0.25mm, 0.125mm, 0.074mm sieves in sequence, and further crushing the semi-coke that cannot pass through the 0.5mm sieve until all samples can pass the sieve;

[0036] Step two, deashing treatment: de-ashing the semi-coke particles obtained in step 1 by flotation to obtain ultra-pure semi-coke;

[0037] Step three, ZnCl 2 Activation: Combine the ultra-pure semi-coke obtained in step two with ZnCl 2 Mix evenly according to the mass ratio of 1:2.0 to obtain ultra-pure semi-coke and ZnCl 2 Mixture of ultra-pure semi coke and ZnCl 2 The mixture is placed in a heating fu...

Embodiment 2

[0046] A method for preparing high-adsorption active semi-coke includes the following steps:

[0047] Step 1: Crush the raw semi-coke: crush the raw semi-coke to semi-coke particles with a diameter of no more than 0.5mm; the specific process is: use the quarter method to reduce the sample, first use a jaw crusher to moderately crush, and then use a ball mill Crushing, and finally sieving the crushed semi-coke with 0.5mm, 0.25mm, 0.125mm, 0.074mm sieves in sequence, and further crushing the semi-coke that cannot pass through the 0.5mm sieve until all samples can pass the sieve;

[0048] Step two, deashing treatment: chemically deashing the semi-coke particles obtained in step 1 to obtain ultra-pure semi-coke;

[0049] Step three, ZnCl 2 Activation: Combine the ultra-pure semi-coke obtained in step two with ZnCl 2 Mix evenly according to the mass ratio of 1:3.5 to obtain ultra-pure semi-coke and ZnCl 2 Mixture of ultra-pure semi coke and ZnCl 2 The mixture was placed in a tube furnace,...

Embodiment 3

[0059] A method for preparing high-adsorption active semi-coke includes the following steps:

[0060] Step 1: Crush the raw semi-coke: crush the raw semi-coke to semi-coke particles with a diameter of no more than 0.5mm; the specific process is: use the quarter method to reduce the sample, first use a jaw crusher to moderately crush, and then use a ball mill Crushing, and finally sieving the crushed semi-coke with 0.5mm, 0.25mm, 0.125mm, 0.074mm sieves in sequence, and further crushing the semi-coke that cannot pass through the 0.5mm sieve until all samples can pass the sieve;

[0061] Step two, deashing treatment: the semi-coke particles obtained in step 1 are deashed first by flotation, and then deashed by chemical methods to obtain ultra-pure semi-coke;

[0062] Step three, ZnCl 2 Activation: Combine the ultra-pure semi-coke obtained in step two with ZnCl 2 Mix evenly according to the mass ratio of 1:2.5 to obtain ultra-pure semi-coke and ZnCl 2 Mixture of ultra-pure semi coke and...

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Abstract

The invention discloses a preparation method of high-adsorptivity activated semi-coke. The high-adsorptivity activated semi-coke is prepared through the following four steps: crushing raw material semi-coke; performing de-ashing treatment; performing ZnCl2 activation; and obtaining ultra-pure activated semi-coke. According to the preparation method disclosed by the invention, the semi-coke is de-ashed with a flotation method or / and a chemical method before being activated, so that the ultra-pure semi-coke is obtained; and then the ultra-pure semi-coke is activated, so that the obtained ultra-pure activated semi-coke has high adsorptivity. The invention also discloses an application of the high-adsorptivity activated semi-coke, which is prepared with the preparation method disclosed by the invention, to waste water treatment. The high-adsorptivity activated semi-coke prepared with the preparation method disclosed by the invention can be used for deep treatment of waste water, and the rate of removing COD and volatile phenol in the waste water is high, so that the high-adsorptivity activated semi-coke is a high-quality carbon adsorbent; and besides, the cost is low, so that the high-adsorptivity activated semi-coke can completely replace activated carbon to be used as a water purification adsorbent.

Description

Technical field [0001] The invention belongs to the technical field of coal chemical industry, and specifically relates to a high-adsorption active semi-coke and a preparation method and application thereof. Background technique [0002] At present, the activated carbon adsorption method is one of the most effective methods for the advanced treatment of urban sewage and industrial wastewater, and it is widely used in the water purification process. Adopting activated carbon adsorption technology, the effluent can reach the standard, but due to the disadvantages such as high cost and difficult regeneration, the scope of its use is limited. [0003] Semi-coke is the product of coal pyrolysis at low temperature (600~700 ℃). Its main component is carbon. Since semi-coke has not been completely pyrolyzed, it contains more hydrogen and oxygen functional groups inside and has richer pores. And surface structure, so activation is easier. At present, the application of activated semi-coke...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/34
CPCB01J20/027B01J20/20C02F1/283C02F2101/34
Inventor 刘静杜美利李刚杨建利王博
Owner XIAN UNIV OF SCI & TECH
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