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Fe-PCH catalyst as well as preparation method and application thereof

A catalyst, fe-pch technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of easy leakage of NH3, high cost of vanadium-titanium catalysts, secondary environmental pollution, etc. The effect of recycling treatment, high thermal stability and high catalytic performance

Inactive Publication Date: 2018-09-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

NH 3 Easy to leak, need special handling and storage equipment, unreacted NH 3 emissions will cause secondary pollution to the environment
Vanadium-titanium catalysts are expensive, inherently toxic, and difficult to recycle after use

Method used

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  • Fe-PCH catalyst as well as preparation method and application thereof
  • Fe-PCH catalyst as well as preparation method and application thereof
  • Fe-PCH catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of organically modified montmorillonite material: Add 1g of montmorillonite raw material to 100ml of NaCl solution with a concentration of 1mol / L, stir vigorously at 60°C for 12h, and then use a high-speed centrifuge for centrifugation (9000RPM, time 5 min), and the obtained sample was dried in a drying oven at 110° C. for 6 h to obtain sodium montmorillonite. Prepare 50ml of cetyltrimethylammonium chloride aqueous solution with a concentration of 0.1mol / L, mix it with 2.5g of the obtained sodium montmorillonite, stir vigorously in a water bath at 60°C for 24h using a magnetic stirrer, and then wash with deionized water 3 to 4 times until the pH value of the washing liquid is 7, the sample is separated by centrifugation as described above, and dried at room temperature for 24 hours to obtain an organically modified montmorillonite material.

[0028] (2) Preparation of montmorillonite heterostructure material: Dry the required utensils in a 110° C. drying...

Embodiment 2

[0031](1) Preparation of organically modified montmorillonite material: Add 1g of montmorillonite raw material to 100ml of NaCl solution with a concentration of 1mol / L, stir vigorously at 60°C for 12h, and then use a high-speed centrifuge for centrifugation (9000RPM, time 5 min), and the obtained sample was dried in a drying oven at 110° C. for 6 h to obtain sodium montmorillonite. Prepare 50ml of cetyltrimethylammonium chloride aqueous solution with a concentration of 0.1mol / L, mix it with 2.5g of the obtained sodium montmorillonite, stir vigorously in a water bath at 60°C for 24h using a magnetic stirrer, and then wash with deionized water 3 to 4 times until the pH value of the washing liquid is 7, the sample is separated by centrifugation as described above, and dried at room temperature for 24 hours to obtain an organically modified montmorillonite material.

[0032] (2) Preparation of montmorillonite heterostructure material: Dry the required utensils in a 110° C. drying ...

Embodiment 3

[0037] (1) Preparation of organically modified montmorillonite material: Add 1g of montmorillonite raw material to 100ml of NaCl solution with a concentration of 1mol / L, stir vigorously at 60°C for 12h, and then use a high-speed centrifuge for centrifugation (9000RPM, time 5 min), and the obtained sample was dried in a drying oven at 110° C. for 6 h to obtain sodium montmorillonite. Prepare 50ml of cetyltrimethylammonium chloride aqueous solution with a concentration of 0.1mol / L, mix it with 2.5g of the obtained sodium montmorillonite, stir vigorously in a water bath at 60°C for 24h using a magnetic stirrer, and then wash with deionized water 3 to 4 times until the pH value of the washing liquid is 7, the sample is separated by centrifugation as described above, and dried at room temperature for 24 hours to obtain an organically modified montmorillonite material.

[0038] (2) Preparation of montmorillonite heterostructure material: Dry the required utensils in a 110° C. drying...

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Abstract

The invention relates to a Fe-PCH catalyst as well as a preparation method and application thereof. The catalyst is prepared from the following components in percentage by mass: 88 to 95 percent of montmorillonite heterostructure material PCHs and 5 to 12 percent of Fe2O3; the catalyst takes the montmorillonite heterostructure material as a carrier and nanoscale Fe2O3 is uniformly dispersed in a PCHs porous channel. The preparation method comprises the steps of preparation of na-montmorillonite, preparation of an organic modified montmorillonite material, preparation of montmorillonite heterostructure material PCHs and preparation of a Fe-PCH catalyst; the catalyst is used for removing NOx in industrial flue gas. The montmorillonite heterostructure material disclosed by the invention is anovel mesoporous material which has a regular three-dimensional porous structure, and has the advantages of large specific surface area, high thermal stability and the like; the montmorillonite heterostructure material is an excellent catalyst carrier. The nanoscale Fe2O3 is uniformly dispersed in the PCHs porous channel to form an SCR active center and selects hydrocarbon as a reducing agent, sothat high denitration efficiency is realized.

Description

technical field [0001] The invention belongs to the field of catalyst materials and their preparation and application, in particular to an Fe-PCH catalyst and its preparation method and application. Background technique [0002] Nitrogen oxides (NO x ) is one of the main air pollutants, which can cause a series of environmental problems and endanger human health. At present, the industrial stationary source denitrification process mainly uses NH 3 As a reducing agent, the commonly used catalyst is V 2 o 5 -WO 3 / TiO 2 , but there are many problems in this denitrification process. NH 3 Easy to leak, need special handling and storage equipment, unreacted NH 3 emissions will cause secondary pollution to the environment. Vanadium-titanium catalysts are expensive, inherently toxic, and difficult to recycle after use. Hydrocarbon Selective Catalytic Reduction of NO (HC-SCR) technology has great development potential, because hydrocarbons are rich in sources and in NO x ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01D53/90B01D53/56
CPCB01D53/8628B01D53/90B01D2251/208B01D2255/20738B01D2258/0283B01J23/745
Inventor 苏亚欣袁旻昊邓文义
Owner DONGHUA UNIV
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