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Method for improving activated carbon performances by self-assembling low-temperature plasma modification

A low-temperature plasma, activated carbon technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of increasing energy consumption of activated carbon modification, uneven discharge, prolonging discharge time, etc., to achieve balanced surface chemical properties and shorten modification. time, the effect of improving the efficiency of modification

Inactive Publication Date: 2017-07-28
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention uses copper sulfate to modify activated carbon to remove gaseous pollutant hydrogen sulfide, but it faces the following defects: (1) The invention loads copper sulfate on the surface of activated carbon, which may block the surface pores of activated carbon, and this method is used to modify activated carbon , the modifier copper sulfate is not in close contact with the activated carbon, it is easy to fall off, and loses its effect; (2) The activated carbon modified by the invention is mainly aimed at adsorbing hydrogen sulfide, and the adsorption effect on other pollutants is unclear; (3) The invention is wet method modification, the waste liquid needs to be treated, which does not conform to the development trend of cleaner production
The invention uses corona discharge plasma to modify activated carbon, and there are disadvantages: (1) The invention adopts a single corona discharge method, which produces less high-energy active substances, and the treatment time of activated carbon modification is 5 to 15 minutes, which is prolonged due to the singleness of the discharge method Discharge time, thereby increasing the energy consumption of activated carbon modification; (2) Due to the use of corona discharge in this invention, there are more or less deficiencies such as uneven discharge, which affects the breaking and reconstruction of chemical bonds on the surface of activated carbon, making the surface properties of activated carbon unbalanced, thus (3) The structure of the device is complex, and the optimum voltage for modifying activated carbon using this device is 15-25 kV, and the time is 10-15 min. The working voltage is high, the modification time is long, and the energy consumption High, higher operating costs, increased production costs

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  • Method for improving activated carbon performances by self-assembling low-temperature plasma modification

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Experimental program
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Effect test

Embodiment 1

[0024] as attached figure 1 As shown, a self-assembled low-temperature plasma modified reactor to improve the performance of activated carbon mainly includes a box 1, a plasma generator 2, a gas distribution and tail gas treatment system, and auxiliary facilities. The box body 1 is rectangular. The plasma generator 2 is mainly composed of a cathode frame 4, an anode frame 5, and a high-voltage insulator 6; the cathode frame 4 is arranged in a rectangular shape by 4 groups of small quartz tubes, 7 sets of stainless steel wires, and 8 negative poles; the anode frame 5 is made of stainless steel rods 9. An octagonal star 10 is placed along the axial direction to form a serrated positive pole; the high-voltage insulator 6 is made of polytetrafluoroethylene, which mainly fixes the cathode frame and the anode frame, and plays the role of insulating high voltage. The gas distribution and tail gas treatment system is a background gas source, a flow meter, a gas buffer device, and an ...

Embodiment 2

[0035] A method for self-assembled low-temperature plasma modification to improve the performance of activated carbon, same as embodiment 1, wherein:

[0036] (1) Activated carbon sieving treatment

[0037] In the (1) step, the activated carbon is sieved and separated for use.

[0038] (2) Reactor detection and setting

[0039] After completing step (1), first open the pressure reducing valve of the steel cylinder to 0.4 MPa, and introduce background gas with a flow rate of 2.0 L / min through the rotameter, and wait for stable and continuous bubbles to appear in the tail gas recovery device, indicating that the reactor is ventilated smoothly. Turn on the power supply, adjust the voltage to 9.0 kV, and after 30 s of power-on, the ozone analysis instrument detects O in the reactor. 3 When generated, it indicates the generation of energetic particles in the reactor. After setting the voltage range value to 9.0 kV, turn off the power. The background gas is air.

[0040] (3) Ac...

Embodiment 3

[0045] A method for self-assembled low-temperature plasma modification to improve the performance of activated carbon, same as embodiment 1, wherein:

[0046] (1) Activated carbon sieving treatment

[0047] In the (1) step, the activated carbon is sieved and separated for use.

[0048] (2) Reactor detection and setting

[0049] After completing step (1), first open the pressure reducing valve of the steel cylinder to 0.4 MPa, and introduce background gas with a flow rate of 2.0 L / min through the rotameter, and wait for stable and continuous bubbles to appear in the tail gas recovery device, indicating that the reactor is ventilated smoothly. Turn on the power supply, adjust the voltage to 10.0 kV, and after 30 s of power-on, the ozone analysis instrument detects O in the reactor. 3 When generated, it indicates the generation of energetic particles in the reactor. After setting the voltage range value to 10.0 kV, turn off the power. The background gas is air.

[0050] (3) ...

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Abstract

The invention discloses a method for improving activated carbon performances by self-assembling low-temperature plasma modification, and belongs to the technical field of activated carbon modification. A self-assembling low-temperature plasma modification reaction device used in the invention mainly comprises a box body, a plasma generator, a gas distribution and exhaust gas treatment system, an auxiliary facility and the like. The activated carbon modification is taken as an aim, and the activated carbon modification is realized via four processes of activated carbon screening treatment, reactor detection and setting, activated carbon modification, and exhaust gas treatment. The method for improving the activated carbon performances by the self-assembling low-temperature plasma modification can effectively reduce the loss of activated carbon, shorten the modification time and improve the modification efficiency of the activated carbon, takes air as an air source which is cheap in price and easily obtained and is simple to operate, free of ozone dissipation and waste liquid to be treated, and environmentally friendly. The method for improving the activated carbon performances by the self-assembling low-temperature plasma modification can be widely used in the activated carbon modification, and further can be popularized and applied to the modification of adsorbents of kaolin and montmorillonite.

Description

technical field [0001] The invention belongs to the technical field of activated carbon modification, and in particular relates to a method for improving the performance of activated carbon through self-assembly low-temperature plasma modification and a reactor thereof. Background technique [0002] Activated carbon has a large specific surface area and rich surface functional groups, and has a strong ability to adsorb and remove organic pollutants and metal ions. It plays an active and huge role in the treatment of wastewater and waste gas in the field of environmental protection. However, activated carbon loses its adsorption activity after adsorption saturation, and needs to be replaced after a period of use; coupled with the limitations of the surface structure of activated carbon and its functional groups, there are disadvantages such as small number of edge atoms of activated carbon, large contact angle of activated carbon, low surface energy, and even liquid repellency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30
CPCB01J20/20B01J20/30
Inventor 王星敏吴潇潇余纯丽何龙斌邓联杰
Owner CHONGQING TECH & BUSINESS UNIV
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