Vanadium-free SCR denitration catalyst and preparation method thereof

A technology of denitration catalyst and plasticizer, applied in the field of denitration catalyst, can solve the problems of toxic effects on human body and environment, narrow operating temperature window of catalyst, etc., and achieve the effect of being beneficial to dispersion, improving use safety, and increasing surface area

Active Publication Date: 2015-12-09
张德生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of existing catalysts such as narrow operating temperature window and certain poisonous effect on human body and

Method used

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  • Vanadium-free SCR denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A vanadium-free SCR denitration catalyst is prepared from the following components in parts by weight:

[0057] 8 parts of diatomaceous earth;

[0058] 13 parts of nano titanium dioxide;

[0059] 6 parts of molecular sieve;

[0060] 9 parts of lanthanum oxide;

[0061] 4 parts of cerium oxide;

[0062] 20 parts of cross-linked chitosan;

[0063] 3 parts talcum powder;

[0064] 6 parts of simethicone;

[0065] 2 parts of phenolic resin;

[0066] 3 parts of dolomite;

[0067] 2 parts of α-cyanoacrylate;

[0068] 4 parts of polytetrafluoroethylene powder;

[0069] 3 parts polyethylene powder;

[0070] 0.2 parts of bis(2-ethylhexyl) phthalate;

[0071] 0.3 parts of dimethyl phthalate;

[0072] Span - 801 copies;

[0073] 2 parts sodium lauryl sulfate;

[0074] 2 parts of polyoxyethylene ether;

[0075] 6 parts of deionized water.

[0076] The preparation technology of a kind of vanadium-free SCR denitration catalyst of the present invention is as follows:

[...

Embodiment 2

[0088] A vanadium-free SCR denitration catalyst is prepared from the following components in parts by weight:

[0089] 12 parts of diatomaceous earth;

[0090] 15 parts of nano-titanium dioxide;

[0091] 8 parts of molecular sieve;

[0092] 10 parts of lanthanum oxide;

[0093] 5 parts of cerium oxide;

[0094] 22 parts of cross-linked chitosan;

[0095] 4 parts of talcum powder;

[0096] 7 parts of simethicone;

[0097] 3 parts of phenolic resin;

[0098] 3 parts of dolomite;

[0099] 4 parts of α-cyanoacrylate;

[0100] 5 parts of polytetrafluoroethylene powder;

[0101] 4 parts of polyethylene powder;

[0102] 0.5 part of bis(2-ethylhexyl) phthalate;

[0103] 0.5 parts of dimethyl phthalate;

[0104] Span - 802 copies;

[0105] 3 parts sodium lauryl sulfate;

[0106] 3 parts of polyoxyethylene ether;

[0107] 8 parts of deionized water.

[0108] The preparation process of the vanadium-free SCR denitration catalyst of the present invention is as follows:

[...

Embodiment 3

[0120] A vanadium-free SCR denitration catalyst is prepared from the following components in parts by weight:

[0121] 15 parts of diatomaceous earth;

[0122] 18 parts of nano-titanium dioxide;

[0123] 12 parts of molecular sieves;

[0124] 12 parts of lanthanum oxide;

[0125] 8 parts of cerium oxide;

[0126] 25 parts of cross-linked chitosan;

[0127] 6 parts of talcum powder;

[0128] 11 parts of simethicone;

[0129] 3 parts of phenolic resin;

[0130] 4 parts of dolomite;

[0131] 5 parts of α-cyanoacrylate;

[0132] 7 parts of polytetrafluoroethylene powder;

[0133] 5 parts of polyethylene powder;

[0134] 1 part of bis(2-ethylhexyl) phthalate;

[0135] 1 part of dimethyl phthalate;

[0136] Span - 805 copies;

[0137] 4 parts sodium lauryl sulfate;

[0138] 6 parts of polyoxyethylene ether;

[0139] 14 parts of deionized water.

[0140] The preparation process of the vanadium-free SCR denitration catalyst of the present invention is as follows:

[0...

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Abstract

The invention relates to a vanadium-free SCR denitration catalyst and a preparation method thereof, and belongs to the field of denitration catalysts. The rare earth modified low temperature SCR denitration catalyst adopts diatomite, molecular sieve and nanometer titanium dioxide as carriers and rare earth oxide as an active site, and does not adopt a toxic active component V2O5. Compared with catalysts in the prior art, the catalyst provided by the invention has the advantages of reduction of pollution to environment, and reaching of the cost reduction and use safety improvement purposes; and cross-linked chitosan resin added in the invention has a special three dimensional net structure, has good stability and good adsorption ability, and is used as the active site together with rare earth oxide, so the denitration activity of the catalyst is improved, and the reaction temperature is reduced. A denitration test result of the vanadium-free SCR denitration catalyst under fixed bed simulated flue gas conditions shows that the denitration rate is 94% or more.

Description

technical field [0001] The invention relates to a vanadium-free SCR denitration catalyst and a preparation method thereof, belonging to the field of denitration catalysts. Background technique [0002] by nitrogen oxides (NO x ) environmental problems such as ozone and acid rain are becoming increasingly prominent, how to effectively eliminate NO x It has become an important topic in the field of environmental protection. Flue gas denitrification, the most mature technology in the world at present is the selective catalytic reduction technology (SCR) with NH3 as the reducing agent. This technology refers to using honeycomb ceramics as the carrier, using vanadium pentoxide as the active component, and injecting the nitrogen oxides in the flue gas and the reducing agent (NH 3 ) undergoes a reduction reaction to generate N under the presence of vanadium pentoxide 2 and H 2 O. The honeycomb ceramic catalyst is the core of SCR technology, which determines the nitrogen remov...

Claims

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Application Information

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IPC IPC(8): B01J31/38
Inventor 赵艳军任谦杨公平牟海波张帅苗澍甘宁
Owner 张德生
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