A device and method for converting volatile organic compounds into nano-carbon products

A volatile organic compound and nano-carbon technology, applied in nano-carbon and other directions, can solve complex engineering problems and other problems, and achieve the effect of saving power consumption, operating cost, and time of disassembly and assembly.

Active Publication Date: 2021-06-25
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, complex engineering problems arise, that is, the reaction device needs to meet the requirements of continuous conversion and standard conversion at all times
This technique has not been reported

Method used

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  • A device and method for converting volatile organic compounds into nano-carbon products

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] use as figure 1 The apparatus shown, wherein the height of the fluidized bed section 1 is twice the height of the fixed bed section 2. The solid passages in the fixed bed section account for 20% of the bed cross-section. A water vapor injection pipe 4 (opening downward) is arranged at the lower part of the fixed bed section 2 .

[0032] Through the catalyst inlet 7 of the fluidized bed section, a nanometer metal-supported catalyst (90% Fe-10% alumina, grain size 1-6nm) with an average particle size of 0.05 mm is loaded into the fluidized bed section 1 . Through the catalyst inlet 9 of the fixed bed section, a nanometer metal-supported catalyst (50% Ni-50% silicon oxide, grain size 5-15nm) with an average diameter of 10 mm is loaded into the fixed bed section 2 . The device is heated to 500° C., and the absolute pressure of the gas product outlet 6 is controlled to be 0.5 MPa.

[0033] From the VOC inlet 5 at the bottom of the fluidized bed section 1, feed VOC gas (VO...

Embodiment 2

[0038] use as figure 1 The apparatus shown, wherein the height of the fluidized bed section 1 is three times the height of the fixed bed section 2. The solid passages in the fixed bed section account for 5% of the bed cross-section. Two steam injection pipes 4 (opening downward) are arranged at the lower part of the fixed bed section 2 .

[0039]Through the catalyst inlet 7 of the fluidized bed section, the nanometer metal-supported catalyst (8% Fe-2%Co-90% silicon oxide with a grain size of 3-7nm) with an average particle size of 0.5 mm is loaded into the fluidized bed section 1 middle. Through the catalyst inlet 9 of the fixed bed section, the nanometer metal supported catalyst (5% Fe-5% Co-5% Cu-85% zirconia, crystal grains of 2-10nm) with an average diameter of 2 mm is loaded into the fixed bed section 2. The device is heated to 1000° C., and the absolute pressure of the gas product outlet 6 is controlled to be 2 MPa.

[0040] From the volatile organic compound inlet ...

Embodiment 3

[0045] use as figure 1 The apparatus shown, wherein the height of the fluidized bed section 1 is 3 times the height of the fixed bed section 1.5. The solid passages in the fixed bed section account for 15% of the bed cross-section. Two steam injection pipes 4 (opening downward) are arranged at the lower part of the fixed bed section 2 .

[0046] Through the catalyst inlet 7 of the fluidized bed section, the nanometer metal-loaded catalyst (30% Fe-20% Cu-5% Mn-45% magnesium oxide, crystal grains of 5-15nm) with an average particle diameter of 0.1-0.3 mm is installed into the fluidized bed section 1. Through the catalyst inlet 9 of the fixed bed section, the nanometer metal supported catalyst (20%Ni-5%Mn-5%W-70% zirconia, crystal grains of 3-20nm) with an average diameter of 3-5 mm is loaded into the fixed bed Bed section 2. The device is heated to 800°C, and the absolute pressure of the gas product outlet 6 is controlled to be 0.1 MPa.

[0047] From the VOC inlet 5 at the ...

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Abstract

The invention discloses a device and method for converting volatile organic compounds into nano-carbon products. The device comprises a fluidized bed section in the lower section, a fixed bed section in the upper section, and a cyclone separator on the upper part of the fixed bed section, and Inlets for volatile organic compounds, water vapor and catalysts, and outlets for carbon products and gas products; the method includes loading nanometer metal-loaded catalysts with different particle sizes in a fluidized bed section and a fixed bed section respectively. The conversion energy is provided by external heating. The solids (catalyst and carbon product) in the fluidized bed section pass through the solid channel of the fixed bed section together with the gas to supply heat to the fixed bed section; the solid returns to the fluidized bed section through the cyclone separator at the upper part of the fixed bed section; Steam is introduced below the fixed bed section to control the fixed bed section from carbon deposition. By using the method, the volatile organic compounds can be converted efficiently and discharged directly, and the added value of preparing carbon nanometer materials is high. It has the advantages of compact equipment structure, small investment and easy enlargement.

Description

technical field [0001] The invention relates to the technical field of conversion of volatile organic compounds, in particular to a device and method for converting volatile organic compounds into nano-carbon products. Background technique [0002] Volatile organic compounds are a particularly large type in exhaust gas, which has the characteristics of complex composition, low content, and large environmental impact effect. The current methods for dealing with volatile organic compounds include enrichment by absorption or adsorption after pre-cooling. Part of the volatile organic compounds can become liquid after enrichment. A small amount of liquid with simple components can be recycled as a product. However, most of the liquid has complex components and is very difficult to continue to separate, and can only be reprocessed by incineration or catalytic oxidation. In addition, there are also volatile components with extremely low boiling points, which often exist in the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15
CPCC01B32/15
Inventor 骞伟中崔超婕
Owner TSINGHUA UNIV
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