Honeycomb low-temperature SCR denitration catalyst and preparation method thereof

A denitrification catalyst, honeycomb technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as difficult molding, and achieve lower calcination temperature, high specific surface area, and energy saving. Effect

Active Publication Date: 2019-03-29
HUADIAN QINGDAO ENVIRONMENTAL TECHNOLOCY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the homogeneous honeycomb low-temperature SCR denitration catalyst has excellent performance, the current honeycomb low-temperature SCR denitration catalyst with a high molybdenum content still needs to be produced by the coating method. Difficult to form in the wet extrusion stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of honeycomb low-temperature SCR denitration catalyst, its preparation method comprises the following steps:

[0041] Mixing: 100 parts of titanium-molybdenum powder of the model SC-X10 produced by American Lilian Company (wherein the molybdenum content is ≥ 7%), 8 parts of carboxymethyl cellulose, 5 parts of polyethylene oxide, 5 parts of silicon dioxide powder, Add 5 parts of silica sol, 7 parts of wood pulp, 25 parts of glass fiber, 50 parts of deionized water, 5 parts of ammonium metavanadate solution, 10 parts of ammonium metatungstate solution, 30 parts of ammonia water and 10 parts of lactic acid into the mixer and mix thoroughly ; After mixing, the water vapor in the mixer is extracted; the molybdenum content in the titanium molybdenum powder is ≥ 7%;

[0042] Molding: Put the material obtained by kneading into the extruder after filtering, and extrude to form a wet billet; in this step, the surface of the extrusion die is treated with electroless nickel ...

Embodiment 2

[0046] A kind of honeycomb low-temperature SCR denitration catalyst, its preparation method comprises the following steps:

[0047]Mixing: 150 parts of titanium-molybdenum powder of the model SC-X10 produced by American Lilian Company (wherein the molybdenum content is ≥ 7%), 20 parts of carboxymethyl cellulose, 10 parts of polyethylene oxide, 7.5 parts of silicon dioxide powder, 7.5 parts of silica sol, 18 parts of wood pulp, 50 parts of glass fiber, 80 parts of deionized water, 15 parts of ammonium metavanadate solution, 20 parts of ammonium metatungstate solution, 55 parts of ammonia water and 15 parts of lactic acid are added to the mixer and fully mixed ; After mixing, extract the water vapor in the mixer;

[0048] Molding: Put the material obtained by kneading into the extruder after filtering, and extrude to form a wet billet; in this step, the surface of the extrusion die is treated with electroless nickel plating, and the thickness of the nickel layer is 100 μm on one...

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PUM

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Abstract

The invention relates to a honeycomb low-temperature SCR denitration catalyst and a preparation method thereof, and belongs to the technical field of flue gas denitration. The preparation method comprises the following steps: A, mixing: 100 parts by weight of titanium-molybdenum powder, 8-20 parts by weight of carboxymethyl cellulose, 5-10 parts by weight of polyethylene oxide, 5-7.5 parts by weight of silicon dioxide powder, 5-7.5 parts by weight of silica sol, 7-18 parts by weight of wood pulp, 25-50 parts by weight of glass fiber, 50-80 parts by weight of deionized water, 5-15 parts by weight of an ammonium metavanadate solution, 10-20 parts by weight of an ammonium metatungstate solution, 30-55 parts by weight of ammonia water and 10-20 parts by weight of lactic acid are added into a mixer to be fully mixed; water vapor in the mixer is pumped after the mixing, and the molybdenum content of the titanium-molybdenum powder is greater than or equal to 7%; B, molding; C, drying; and D,calcination. By the preparation method, the energy consumption is reduced, and the denitration efficiency of the obtained honeycomb low-temperature SCR denitration catalyst at the temperature of 160 to 250 DEG C reaches 83% and above.

Description

technical field [0001] The invention relates to a honeycomb low-temperature SCR denitrification catalyst and a preparation method thereof, belonging to the technical field of flue gas denitrification. Background technique [0002] In the production of honeycomb low-temperature SCR denitration catalyst, molybdenum element is often added to improve the low-temperature performance of the catalyst. The addition method of molybdenum element is closely related to the production process of the catalyst. [0003] There are two main methods for the production of honeycomb low-temperature SCR denitration catalysts: coating method and mixed extrusion method. The coating method is based on pre-treated honeycomb ceramics (such as cordierite), coated with granular catalysts on its surface, and then dried and roasted to obtain catalysts. This type of catalyst has high strength and wear resistance, but has few active components. . The mixed extrusion method is to add suitable additives to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J37/08B01D53/90B01D53/56
CPCB01D53/8628B01D53/90B01D2255/20707B01D2255/20723B01D2255/20769B01D2255/20776B01D2255/30B01J23/30B01J37/08
Inventor 高春昱孟凡强秦一鸣王建国陈华于宁范娟孙文强徐海龙贺明洁王金峰刘莉张鑫韩同江
Owner HUADIAN QINGDAO ENVIRONMENTAL TECHNOLOCY CO LTD
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