Ceramic honeycomb type denitrating catalyst and preparation method thereof

A denitration catalyst, ceramic honeycomb technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of easy secondary pollution, high vanadium toxicity, high cost, and achieve reduced production costs and high denitrification. The effect of efficiency

Active Publication Date: 2012-01-04
TSINGHUA UNIV +1
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  • Abstract
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Problems solved by technology

However, vanadium-titanium catalysts have problems such as high cost, hi

Method used

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Embodiment Construction

[0040] The present invention will be further described in detail below in combination with specific embodiments.

[0041] material selection

[0042] The active ingredient of the catalyst is ferrous sulfate.

[0043] The solvent can be water or deionized water, or other suitable solvents. In view of cost, it is preferable to use water as the solvent.

[0044] The catalyst carrier can use molecular sieves, such as A-type zeolite molecular sieves, X-type zeolite molecular sieves, Y-type zeolite molecular sieves, ZSM series molecular sieves, MFI molecular sieves, MOR molecular sieves, etc., and other types of molecular sieves suitable for ferrous sulfate can also be used. In other embodiments, the catalyst carrier may also use other non-molecular sieve materials suitable for ferrous sulfate, such as cordierite, mullite, or pillared clay.

[0045] Forming aids may include binders, extrusion aids, pore-forming agents and / or reinforcing agents, etc. Those skilled in the art can ...

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Abstract

The invention discloses a ceramic honeycomb type denitrating catalyst. The ceramic honeycomb type denitrating catalyst is formed by mixing, forming and calcining a catalyst active ingredient, a catalyst carrier and a forming aid, wherein the catalyst active ingredient is ferrous sulphate. In an embodiment, the catalyst active ingredient comprises 20 to 40 weight parts of the ferrous sulphate; thecatalyst carrier comprises 60 to 90 weight parts of molecular sieve; the forming aid comprises 2 to 4 weight parts of citric acid, 2 to 6 weight parts of sodium carboxymethylcellulose, 2 to 6 weight parts of polyoxyethylene, 0.2 to 1.0 weight part of glycerol, 2 to 4 weight parts of nitric acid, 90 to 120 weight parts of pseudoboehmite, 30 to 40 weight parts of Suzhou clay, 2 to 6 weight parts ofsesbania cannabina pers powder and 10 to 30 weight parts of glass fiber. The raw materials of the catalyst have low cost and do not have toxicity. The denitrating catalyst module has high denitratingefficiency and certain anti-poisoning property and mechanical strength.

Description

technical field [0001] The present invention generally relates to a catalyst for flue gas denitration, and more specifically, the present invention relates to a ceramic honeycomb denitration catalyst and a preparation method thereof. Background technique [0002] It is well known that nitrogen oxides NO X (mainly NO and NO 2 ) is a major air pollutant. Contains NO X If the flue gas is discharged into the atmosphere without treatment, it will cause serious harm to human health and the human living environment. In my country's "Twelfth Five-Year Plan", NO X emission reduction as a binding assessment indicator. Therefore, controlling NO X emissions are imminent. [0003] It has been found in the prior art that selective catalytic reduction (Selective caalytic reduction, SCR) is an effective method for flue gas denitrification (ie removal of nitrogen oxides). The principle of SCR denitrification is to inject NH into the exhaust gas 3 and other reducing agents, under the...

Claims

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Application Information

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IPC IPC(8): B01J29/00B01J27/053B01J35/04B01D53/86B01D53/56
Inventor 禚玉群赵博任雯赵宇峰陈昌和
Owner TSINGHUA UNIV
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