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Device and method for efficiently converting volatile organic compounds

A volatile organic compound, high-efficiency technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve complex engineering problems and other problems, achieve the effect of long reaction life and device cost reduction

Active Publication Date: 2020-06-05
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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  • Device and method for efficiently converting volatile organic compounds

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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 porosity of the porous distribution plate 3 is 30%, and the diameter of a single hole is 1 mm. On the cross-section of the fluidized bed section 1 0.5 m below the porous distribution plate 3, a 1 cm thick wire mesh layer 4 (platinum, with a porosity of 90%, and a single hole diameter of the wire mesh less than 0.01 mm) is set. At the central position of the perforated distribution plate 3 and the wire mesh layer 4, a water vapor injection pipe 5 (opening downward, facing the wire mesh layer 4) is arranged.

[0032] Through the catalyst inlet 8 of the fluidized bed section, a nanometer metal-supported catalyst (10% Fe-90% alumina, 1 nm in grain size) with an average particle size of 0.05 mm is charged into the fluidized bed section 1 . Through the catalyst inlet 10 of the fixed bed section, a nanometer metal-supported catalyst (90% ...

Embodiment 2

[0037] use as figure 1The apparatus shown, wherein the height of the fluidized bed section 1 is 5 times the height of the fixed bed section 2. The porosity of the porous distribution plate is 70%, and the diameter of the single hole is 8mm. On the cross-section of the fluidized bed section 1 1 m below the porous distribution plate 3, a 3 cm thick wire mesh layer 4 (stainless steel, with a porosity of 95%, and a single hole diameter of the wire mesh less than 0.01 mm) is set. At the central position of the perforated distribution plate 3 and the wire mesh layer 4, five water vapor injection pipes 5 (opening downwards, facing the wire mesh layer 4) are arranged.

[0038] Through the catalyst inlet 8 of the fluidized bed section, a nanometer metal-supported catalyst (10% Fe-90% alumina, grain size 20nm) with an average particle size of 0.5 mm is charged into the fluidized bed section 1 . Through the catalyst inlet 10 of the fixed bed section, a nanometer metal-supported catalys...

Embodiment 3

[0043] 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 porosity of the porous distribution plate 3 is 60%, and the diameter of a single hole is less than 3mm. On the fluidized bed section 1 cross-section 0.8m below the porous distribution plate 3, a 2cm-thick wire mesh layer 4 (nickel, porosity 92%, single hole diameter of the wire mesh less than 0.01mm) is set. At the central position of the perforated distribution plate 3 and the wire mesh layer 4, four water vapor injection pipes 5 (opening downwards, facing the wire mesh layer 4) are arranged.

[0044] Through the catalyst inlet 8 of the fluidized bed section, the nanometer metal supported catalyst (30% Fe-30% Co-10% Mo-30% magnesia, crystal grain is 5nm) with an average particle diameter of 0.1-0.3 mm is loaded into the fluidized bed In bed section 1. Through the catalyst inlet 10 of the fixed bed section, a nanometer metal...

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Abstract

The invention discloses a device and method for efficiently converting volatile organic compounds. The lower section of the device is a fluidized bed section, the upper section of the device is a fixed bed section, the fluidized bed section and the fixed bed section are separated by a porous distribution plate, and a metal wire mesh layer for preventing solids of the fluidized bed section from moving upwards, inlets of volatile organic compounds, water vapor and catalysts and outlets of a carbon product and a gas product are arranged. The method comprises the following steps: respectively filling the fluidized bed section and the fixed bed section with the nano-metal supported catalysts with different particle sizes. Conversion energy is provided through external heating, and heat is supplied to the catalyst of the fixed bed section through gas of the fluidized bed section, water vapor is introduced into the middle of the reaction device, the fluidized bed section is controlled to produce a large number of the carbon product, carbon deposition is avoided in the fixed bed section, and a long catalyst life is maintained. By utilizing the method, the volatile organic compounds are efficiently converted and directly discharged, meanwhile, the carbon nano material is prepared, and the additional value is increased. The device has the advantages of compact structure, low investment and easiness in amplification.

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 efficiently converting volatile organic compounds. 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 form of gas, an...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/44
CPCB01D53/44B01D53/8687B01D2256/10B01D2256/18B01D2257/708Y02A50/20
Inventor 崔超婕骞伟中
Owner TSINGHUA UNIV
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