Sweet dumpling type formed sulfur-resistant low-temperature denitration catalyst as well as preparation method and application thereof

A denitration catalyst and catalyst technology, which are used in catalyst protection, molecular sieve catalysts, chemical instruments and methods, etc., to achieve the effects of good gas flow, reduced pressure drop, and excellent low-temperature activity.

Pending Publication Date: 2020-12-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the current low-temperature denitrification catalyst, a denitrification catalyst with molecular sieve wrapped in a protective shell is provided, and a method for preparing a sulfur-resistant low-temperature denitrification catalyst by rolling yuanxiao molding is provided.

Method used

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  • Sweet dumpling type formed sulfur-resistant low-temperature denitration catalyst as well as preparation method and application thereof
  • Sweet dumpling type formed sulfur-resistant low-temperature denitration catalyst as well as preparation method and application thereof
  • Sweet dumpling type formed sulfur-resistant low-temperature denitration catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] 20 g of catalyst pellets Cat-1 were used as core pellets. Mix the catalyst core pellets with 20g of titanium oxide powder, 5.4g of silica sol, and 0.6g of squash powder and roll them into catalyst pellets (referred to as F-Cat-1). In the catalyst, the mass ratio of molecular sieve, active component and protective layer is 10:3.3:13.

Embodiment 2

[0114] 20 g of catalyst pellets Cat-1 were used as core pellets. Mix catalyst core pellets with 35g of titanium oxide powder, 6.04g of silica sol, and 0.73g of turnip powder and roll them into catalyst pellets (referred to as F-Cat-2). In the catalyst, the mass ratio of molecular sieve, active component and protective layer is 10:3.3:23.4.

Embodiment 3

[0116] 20 g of catalyst pellets Cat-1 were used as core pellets. Mix catalyst core pellets with 100g of titanium oxide powder, 15.86g of solid silica gel, and 3g of starch and evenly roll them into catalyst pellets (referred to as F-Cat-3). In the catalyst, the mass ratio of molecular sieve, active component and protective layer is 10:3.3:66.7.

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Abstract

The invention discloses a sweet dumpling forming sulfur-resistant low-temperature denitration catalyst as well as a preparation method and application thereof. The denitration catalyst comprises a molecular sieve and a protective shell, the molecular sieve is wrapped by the protective shell; the molecular sieve is loaded with an active component; the protective shell contains titanium oxide; and the protective shell has a porous structure. The protective shell can be flexibly adjusted according to the content of sulfur and water under different working conditions. The denitration catalyst hasthe characteristics of sulfur resistance and water resistance, has a pore structure, reduces pressure drop, enables reaction gas to be more easily close to a catalytic center, is used for denitrationof fixed source flue gas, has the advantages of excellent low-temperature activity and sulfur poisoning resistance, and can be repeatedly used through regeneration.

Description

technical field [0001] The application relates to a roll-shaped Lantern-shaped anti-sulfur low-temperature denitrification catalyst and its preparation method and application, belonging to the field of chemical catalysts. Background technique [0002] Nitrogen oxides (NO X ) is the main pollutant that forms acid rain, photochemical smog and smog, and its sources are mainly motor vehicle exhaust and coal-fired power plant emissions. With the country's emphasis on environmental protection, its emission standards are becoming more and more stringent. Therefore, how to effectively remove nitrogen oxides in flue gas has become an urgent problem to be solved. At present, there are many kinds of NO removal methods at home and abroad. X method, where, to NH 3 The Selective Catalytic Reduction (SCR) technology is currently the most researched, most widely used and most effective flue gas removal technology. Catalyst is the core of SCR technology, which directly affects the effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/48B01J33/00B01J35/08B01J35/10B01D53/86B01D53/56
CPCB01D53/8628B01J29/48B01J33/00B01J35/08B01J35/10
Inventor 谢宏彬蒋祥梅刘家旭
Owner DALIAN UNIV OF TECH
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