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System and method for treating gas containing volatile organic compounds and preparing carbon nanomaterial

A technology of volatile organic compounds and carbon nanomaterials, applied in gas treatment, separation methods, combustible gas purification, etc., can solve problems such as gaseous organic compounds that are difficult to handle, and achieve the effect of reducing CO2 emissions and reducing costs

Active Publication Date: 2020-01-03
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the deficiencies in the above-mentioned prior art, the object of the present invention is to provide a system and method for treating gas containing volatile organic matter by adsorption and converting organic matter into carbon nanomaterials, which solves the problem of refractory gaseous organic matter after concentration and desorption. At the same time, it realizes the heat recovery and utilization of exhaust gas, reduces energy consumption and increases the added value of products

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  • System and method for treating gas containing volatile organic compounds and preparing carbon nanomaterial
  • System and method for treating gas containing volatile organic compounds and preparing carbon nanomaterial

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Experimental program
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Effect test

Embodiment 1

[0030] like figure 1 As shown, the gas adsorption / desorption subsystem 1, the gas-liquid separation subsystem 2, and the tail gas carbonization subsystem 3 are connected in sequence;

[0031] The gas containing volatile organic compounds (the main gas is nitrogen, and the organic matter is 5000ppm C2-C10 hydrocarbons) is introduced from the gas inlet 4 containing volatile organic compounds of the gas adsorption / desorption subsystem 1, the adsorption temperature is -20 ° C, and the pressure is 2MPa, after passing through the adsorbent layer in the gas adsorption / desorption subsystem 1, the organic matter is adsorbed on the adsorbent (the mass fraction is 50% carbon nanotubes and 50% molecular sieve), and the treated argon gas (organic matter is less than 50ppm , aromatic hydrocarbons are lower than 4ppm) the waste gas discharged up to the standard is discharged from the gas outlet 5 after adsorption of the gas adsorption / desorption subsystem 1;

[0032] When the adsorption lay...

Embodiment 2

[0036] like figure 2 As shown, the gas adsorption / desorption subsystem 1, the gas-liquid separation subsystem 2, and the tail gas carbonization subsystem 3 are connected in sequence;

[0037] The gas containing volatile organic compounds (the main gas is argon, and the organic matter is 20000ppm C 1 -C 3Alcohol, a mixture of epichlorohydrin in any proportion) is introduced from the gas inlet 4 containing volatile organic compounds of the gas adsorption / desorption subsystem 1, the adsorption temperature is -25-0°C, and the pressure is 2MPa. After gas adsorption / desorption After attaching the adsorbent layer in subsystem 1, the organic matter is adsorbed on the adsorbent (20% activated carbon, 80% graphene), the treated argon (organic matter is less than 1.5ppm), and the exhaust gas that reaches the standard is adsorbed / desorbed from the gas. The gas outlet 5 of the attached subsystem 1 is discharged after adsorption;

[0038] When the adsorption layer of the gas adsorption / ...

Embodiment 3

[0041] like figure 2 As shown, the gas adsorption / desorption subsystem 1, the gas-liquid separation subsystem 2, and the tail gas carbonization subsystem 3 are connected in sequence;

[0042] Argon gas containing volatile organic compounds (the main gas is any mixture of hydrogen and CO, the organic matter is 200,000 ppm of crude oil components with a molecular weight of 200-300) is passed from the gas containing volatile organic compounds of the gas adsorption / desorption subsystem 1. The inlet 4 is passed through, the adsorption temperature is 20 °C, and the pressure is 0.3 MPa. After passing through the adsorbent layer in the gas adsorption / desorption subsystem 1, the organic matter is adsorbed on the adsorbent (graphene), and the treated CO and H2 The waste gas discharged from the mixture (organic matter less than 10ppm) up to the standard is discharged from the gas outlet 5 after adsorption of the gas adsorption / desorption subsystem 1;

[0043] When the adsorption layer ...

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Abstract

The invention discloses a system and a method for treating a gas containing volatile organic compounds and preparing a carbon nanomaterial. The system comprises a gas adsorption / desorption subsystem,a gas-liquid separation subsystem and a tail gas carbonization subsystem. The method for treating the gas containing the volatile organic compounds and preparing the carbon nanomaterial by using the system comprises the following steps: the gas containing the volatile organic compounds is adsorbed through the gas adsorption / desorption subsystem, and the gas discharged from the gas adsorption / desorption subsystem is discharged after reaching standards; the organic matters desorbed by the gas adsorption / desorption subsystem are condensed through the gas-liquid separation subsystem to obtain a liquid, and the liquid is collected, and reused or retreated; and tail gas discharged from the gas-liquid separation subsystem enters the tail gas carbonization subsystem, and generates the carbon nanomaterial at a high temperature, and the tail gas of the tail gas carbonization subsystem and the tail gas of the gas adsorption / desorption subsystem are mixed, and then are discharged after reaching standards. The system and the method realize gradient utilization of volatile organic compound components, and are highly safe due to a carbonization process; and the light volatile organic compounds most difficult to treat are changed into the carbon nanomaterial, so that the cost of an adsorbent is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and environmental protection, and in particular relates to a system and method for treating gas containing volatile organic compounds by an adsorption method and preparing carbon nanomaterials. Background technique [0002] Chemical production process, material processing industry and catering industry, as well as oil storage, loading and unloading process, often produce a large amount of gas containing volatile organic compounds (VOCs), which has strong dispersion, many components, large molecular weight differences, and large physical property differences. . Methods for treating gases containing volatile organic compounds usually include condensation, adsorption, absorption, oxidation, etc. Among them, various porous materials (such as activated carbon and silica gel) are commonly used in the adsorption method, which has the characteristics of simple and safe process. If activated ca...

Claims

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Application Information

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IPC IPC(8): B01D53/04B01J20/30B01J20/34B01J20/20
CPCB01D53/04B01D2257/702B01J20/205B01J20/3416B01J2220/4875
Inventor 骞伟中崔超婕尹泽芳于翔
Owner TSINGHUA UNIV
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