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SCR catalyst directly moulded from active component via 3D printing and preparation method of SCR catalyst

A SCR catalyst, 3D printing technology, applied in physical/chemical process catalysts, separation methods, chemical instruments and methods, etc., can solve the problems of difficult regeneration and recycling, limited geometric specific surface area, large airflow resistance, etc., and achieve denitrification efficiency Enhanced, large specific surface area, and reduced smoke resistance

Active Publication Date: 2018-05-22
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its airflow resistance is large, the geometric specific surface area is limited, and the loss is high in practical industrial applications; at the same time, it also causes difficulties in the regeneration and recycling of the active components of the catalyst after they fail.

Method used

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  • SCR catalyst directly moulded from active component via 3D printing and preparation method of SCR catalyst
  • SCR catalyst directly moulded from active component via 3D printing and preparation method of SCR catalyst
  • SCR catalyst directly moulded from active component via 3D printing and preparation method of SCR catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An SCR catalyst whose active components are directly formed by 3D printing, including the following raw materials in parts by mass:

[0028]

[0029] A method for preparing an SCR catalyst whose active components are directly formed by 3D printing, specifically comprising the following steps: (1) 100 parts by mass of graphite oxide prepared by Hummer's method, 20 parts by mass of manganese acetate tetrahydrate and polymethyl methacrylate 200 parts by mass, placed in a ball mill at a speed of 800r / min, dispersed for 2h;

[0030] (2) Weigh 30 parts by mass of phthalic acid diacrylate, add 5 parts by mass of Omnicat650 into the above dispersion, mechanically stir for 1 hour, and ultrasonically oscillate for 1 hour;

[0031] (3) Establish a honeycomb catalyst model through the computer software AutoCAD, set the model as a hexagonal junction with a side length of 200mm, a height of 200mm, and a 0.5mm diameter hole inside, and decompose the three-dimensional model into sli...

Embodiment 2

[0035] An SCR catalyst whose active components are directly formed by 3D printing, including the following raw materials in parts by mass:

[0036]

[0037] A method for preparing an SCR catalyst whose active components are directly formed by 3D printing, specifically comprising the following steps: (1) 100 parts by mass of graphite oxide prepared by Hummer's method, 30 parts by mass of manganese acetate tetrahydrate and polymethyl methacrylate 200 parts by mass, placed in a ball mill at a speed of 400r / min, dispersed for 2h;

[0038] (2) Weigh 50 parts by mass of phthalic acid diacrylate, add 7 parts by mass of Omnicat650 to the above dispersion, stir mechanically for 1 h, and ultrasonically for 1 h;

[0039] (3) Establish a honeycomb catalyst model through the computer software AutoCAD, set the model as a hexagonal junction with a side length of 100 mm, a height of 100 mm, and a 1 mm diameter hole inside, and decompose the three-dimensional model into slices with a thickn...

Embodiment 3

[0043] An SCR catalyst whose active components are directly formed by 3D printing, including the following raw materials in parts by mass:

[0044]

[0045]

[0046]A method for preparing an SCR catalyst whose active components are directly formed by 3D printing, specifically comprising the following steps: (1) 100 parts by mass of graphite oxide prepared by Hummer's method, 40 parts by mass of manganese acetate tetrahydrate and polymethyl methacrylate 300 parts by mass, placed in a ball mill at a speed of 800r / min, dispersed for 2h;

[0047] (2) Weigh 70 parts by mass of phthalic acid diacrylate, add 8 parts by mass of Omnicat650 into the above-mentioned dispersion liquid, stir mechanically for 1 hour, and oscillate ultrasonically for 1 hour;

[0048] (3) Establish a honeycomb catalyst model by computer software AutoCAD, set the model as a hexagonal junction with a side length of 150mm, a height of 150mm, and a 1.5mm diameter hole inside, and decompose the three-dimensi...

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Abstract

The invention relates to a catalyst, especially to an SCR catalyst directly moulded from an active component via 3D printing and a preparation method of the SCR catalyst. The SCR catalyst comprises, by mass, 100 parts of graphite oxide, 20-50 parts of manganese salt, 200-400 parts of reactive oligomer, 30-100 parts of an active diluent, and 5-10 parts of a photoinitiator. A graphene and manganeseoxide composite material is taken as an active component of the catalyst. The catalyst has a low-temperature SCR active window, the water adsorption of the surface of the catalyst is reduced, sulfatedeposition on the surface of the catalyst is reduced, and the water-resistant sulfur-poisoning-resistant performance of the catalyst is improved. Through a one-step 3D printing method, the active component of the catalyst is directly moulded. Compared with a traditional honeycomb SCR catalyst, the catalyst is large in specific surface area and suitable for a channel structure. Therefore, the smokeresistance is effectively reduced, the pressure reduction is reduced, and the service life of the catalyst is improved. The catalyst is free of a ceramic carrier, the load capacity of the catalyst iseffectively improved, and the denitration efficiency of the catalyst is significantly improved.

Description

technical field [0001] The invention relates to a catalyst, in particular to an SCR catalyst whose active components are directly formed by 3D printing and a preparation method thereof. Background technique [0002] my country is the country that uses the most coal energy in the world. The development and utilization of coal seriously pollutes the environment and endangers human health. The combustion of coal produces a large amount of sulfur dioxide (SO 2 ) and nitrogen oxides (NO x ), resulting in a series of environmental problems such as acid rain, photochemical smog, and secondary particle pollution. According to statistics, more than 90% of NO x Emissions are from the combustion of fossil fuels in power plants, cement plants, and steel mills. In recent years, countries for NO x Strict restrictions have been imposed on emissions and related regulations have been formulated. Therefore, for the emitted NO x Processing is necessary. [0003] The Selective Catalytic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/90B01D53/56
CPCB01D53/8628B01D53/90B01D2255/2073B01D2255/702B01J23/34
Inventor 曲殿利姚焯李媛郭玉香
Owner UNIV OF SCI & TECH LIAONING